Chainrings

Proven cross-compatibility applied to an ultra-lightweight, durable AL-7075-T6 chainring. Highly CNC'd technical finish. Available to match Helix cassette colors, SRAM™ compatible 3-bolt design. A technology first. Combine with the chain, derailleur/shifter of choice without a change in chain retention quality. Build a dream rig with more freedom and spec creatively. Available in bold colors to match the popular e*thirteen Helix R Cassettes, Plus 35 Stems, and Quick Fill Plasma Valves. - Save weight, keep your drivetrain options open, and use the chain you want - 3-Bolt Direct Mount design for use with SRAM™ 3-bolt direct mount compatible cranks - Cut from billet AL-7075 for the highest strength and wear resistance - SRAM™ and Shimano™ 11 and 12 Speed Chain Compatible - Extensive CNC machining for lightweight and looks that kill - Available in 5 bold Ano colors and 4 sizes 28/30/32/34t - Match and personalize the way you want? - E*thirteen QuickConnect Direct Mount rings include 1mm spacers which allows them to be run on legacy cranks (TRS/LG1/XCX) as well as Helix and Helix R cranks - 3-bolt direct mount chainrings fit SRAM and other similar interface cranks - Tooth profile

Customize your ride with The Helix Race Direct Mount Chainring. Made from ultra-lightweight and durable AL-7075-T6, this chainring offers compatibility with SRAM™/Shimano™ chains and features a flip-flop design for chain line adjustment. With bold color options that match e*thirteen's popular components, it's the perfect addition to your dream rig, ensuring maximum strength and longevity. - E*thirteen QuickConnect Direct Mount rings include 1mm spacers, which allows them to be run on legacy cranks (TRS/LG1/XCX), as well as Helix and Helix R cranks - 3-bolt direct mount chainrings fit SRAM and other similar interface cranks - Tooth profile is compatible with both Shimano and SRAM chains in both 11 and 12-speed - Can be flipped to provide either a 52 or 55mm chainline

Lighter, stronger, and better looking than our original Guiderings; the Guidering SL is intended for use on TRS, LG1, and legacy e*thirteen cranks. The Guidering SL is -8mm offset. This offset will achieve both boost (52mm) and non-boost (49mm) spacing on e*thirteen cranks that feature adjustable chainline (2019 and newer TRS & LG1). On legacy and XCX cranks the Guidering SL will achieve a 49mm non-boost chainline. - Direct Mount chainring for TRS and LG1 cranks - Updated M3 narrow-wide tooth profile eliminates chain noise, and decreases overall system wear while retaining chain - 10/11/12 speed. Compatible with both Shimano and SRAM 12-speed drivetrains - Allows both Boost 148mm and non-boost 142mm chainline on adjustable TRS and LG1 cranks SL Chainrings are not compatible with Helix cranks. Helix cranks require Helix rings.

UL Chainrings are the lightest 1x XC/Gravel chainrings on the market. Using the SL Chainring as the platform, we tweaked the arm design and strategically machined the chainring so that only minimal sacrifice was made in impact strength for large gains in weight reduction. - Direct Mount chainring for XCX, TRS, and LG1 cranks - Updated M3 narrow-wide tooth profile eliminates chain noise, and decreases overall system wear while retaining chain - 10/11/12 speed. Compatible with both Shimano and SRAM 12-speed drivetrains - Provides Boost 148mm chainline on XCX Mountain cranks and 142mm chainlines on XCX Gravel cranks - Provides chainline for Superboost spacing on TRS and LG1 cranks UL Chainrings are not compatible with Helix cranks. Helix cranks require Helix rings available soon.

Upgrade your e-bike drivetrain with our Bosch e*spec Direct Mount Chainrings. Our M3 narrow-wide tooth profile reduces weight without compromising on chain retention. While the steel version is a direct OEM replacement, the premium aluminum versions provide cleaner aesthetics, lighter weight, and long-lasting performance perfect for when you're ready to upgrade from your original ring. Conquer your e-bike trails at a great price—power up your drivetrain now! - Direct Mount chainring for Bosch and Shimano E-Bike fitment - Updated M3 narrow-wide tooth profile eliminates chain noise and decreases overall system wear while retaining chain - 11/12 speed. Compatible with both Shimano and SRAM 12 speed drivetrains

Take on the toughest terrain and upgrade your e-bike drivetrain with our Shimano e*spec Direct Mount Chainrings. Our M3 narrow-wide tooth profile reduces weight without compromising on chain retention. Our premium aluminum rings provide cleaner aesthetics, lighter weight, and long-lasting performance. Take on the elements with confidence and power up your drivetrain now! - Direct Mount chainring for Bosch and Shimano E-Bike fitment - Updated M3 narrow-wide tooth profile eliminates chain noise and decreases overall system wear while retaining chain - 11/12 speed. Compatible with both Shimano and SRAM 12-speed drivetrains

absoluteBLACK Oval 104/64 BCD Chainrings greatly improve traction and climbing abilities. They are designed for use with all cranksets with a 104/64 BCD interface, including Shimano, SRAM, Race Face, FSA, and more. These chainrings allow you to run a 1x system without chain retention issues. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 9, 10, 11, and 12-speed Eagle compatible

absoluteBLACK Oval 110 BCD 1x Chainrings for Cyclocross greatly improve traction for CX or gravel riding. They are designed for all Shimano 4-bolt cranks such as Dura-Ace 9100, 9000, Ultegra 8000, 6800, and more. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.5-11.4%, with timing of 112-113° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Provides excellent weight-to-strength ratio - 12-Speed Eagle compatible - Chainring bolts are included

absoluteBLACK Oval 110 BCD 1x Chainrings for gravel greatly improve traction for gravel or road 1x setups. They are designed for all Shimano 4-bolt cranks such as Dura-Ace 9100, 9000, Ultegra 8000, 6800, and more. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.5-11.4%, with timing of 112-113° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Provides excellent weight-to-strength ratio - 12-Speed Eagle compatible - Chainring has 1.5mm offset toward frame to provide the perfect chainline - Chainring bolts are included

absoluteBLACK Oval 110 BCD 1x Chainrings for cyclocross greatly improve traction for CX or gravel riding. They are designed for all Shimano 5-bolt cranks such as Dura-Ace 7950, Ultegra 6750, Shimano 105 5750, and more. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.5-11.4%, with timing of 112-113° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 12-Speed Eagle compatible - Chainring bolts are included

absoluteBLACK Oval 110 BCD 1x Chainrings for gravel greatly improve traction for gravel or road 1x setups. They are designed for all Shimano 5-bolt cranks such as Dura-Ace 7950, Ultegra 6750, Shimano 105 5750, and more. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.5-11.4%, with timing of 112-113° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Provides excellent weight-to-strength ratio - 12-Speed Eagle compatible - Chainring has 1.5mm offset toward frame to provide the perfect chainline - Chainring bolts are included

absoluteBLACK Oval 110 BCD 1x Chainrings for cyclocross greatly improve traction for CX or gravel riding. They are designed specifically for SRAM Apex 1 cranks that feature an asymmetric 110 BCD, 4-bolt pattern. The specially designed narrow-wide tooth profile keeps the chain snug. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Only compatible with SRAM Apex 1 cranks - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Provides excellent weight-to-strength ratio - 9, 10, 11, and 12-speed Eagle compatible

absoluteBLACK Oval 76 BCD Chainrings greatly improve traction and climbing abilities. They are designed for Rotor REX cranksets with their original 1x spider. Lighter and stiffer than original chainrings, these provide a super-smooth pedaling sensation. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Only compatible with Rotor Rex cranks - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio

absoluteBLACK 96 BCD chainrings for Hyperglide+ greatly improve traction and climbing abilities. They are designed specifically for Shimano XT M8000, SLX M7000, and MT700 1x or 2x cranks. These chainrings will only work with Shimano CN-M9100, 8100 & 7100 Hyperglide+ chains due to the different thickness and shape of the teeth. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4% and timing of 110.5-116.3° after TDC (top dead center). - This chainring will only work with Shimano CN-M9100, 8100, & 7100 Hyperglide+ chains due to the different thickness of the teeth - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Provides excellent weight-to-strength ratio - Chainrings have built-in standoffs to provide the ideal 1X chainline - For 49mm chainline - Only use the included extra-long chainring bolts

absoluteBLACK Oval 96 BCD 1x Chainrings greatly improve traction and climbing abilities. They are designed for use with Shimano XT M8000, SLX M7000, and MT700 1x or 2x cranks only. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Only compatible with Shimano XT M8000, SLX M7000, and MT700 1x or 2x cranks - Chainrings fit boost and non-boost bikes, as correct offset is realized by the crank spider itself, not chainring - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Chainrings have built-in standoffs to provide the ideal 1X chainline - For 49mm chainline - Only use the included extra-long chainring bolts

absoluteBLACK Oval 96 BCD 1x Chainrings greatly improve traction and climbing abilities. They are designed for use with Shimano XTR M9000 and M9020 cranks only. The specially designed narrow-wide tooth profile keeps the chain snug, allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Only compatible with Shimano XTR M9000 and M9020 cranks - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Rings have built-in threads for ease of mounting and reduction in weight - Not compatible with Shimano XT M8000 cranks

absoluteBLACK Oval Direct Mount 1x Chainrings for CINCH greatly improve traction and climbing abilities. They are designed for Easton EC90SL cranks or Race Face cranks that utilize the CINCH system. The super-stiff design is well suited for cyclocross and gravel riding. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-12.1%, with timing of 110.5-112.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 3mm Offset

absoluteBLACK 1x CX Oval Direct Mount Chainrings for SRAM are designed for SRAM cranks, such as Force and Rival, on which the spider can be replaced with a direct mount chainring. This chainring is well suited for cyclocross and gravel riding. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-12.1%, with timing of 110.5-112.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 6mm offset is designed for 135/142 spacing on standard DUB/GXP/Long-Spindle BB30, as well as 170/177 spacing on fat bike cranks

absoluteBLACK Oval Direct Mount 1x Chainrings for CINCH greatly improve traction and climbing abilities. They are designed for Race Face cranks that utilize the CINCH system. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 3mm offset is designed for bikes with Boost spacing and fat bikes (when reversed)

absoluteBLACK Oval Direct Mount 1x Chainrings for CINCH greatly improve traction and climbing abilities. They are designed for Race Face cranks that utilize the CINCH system. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 6mm offset for standard 49mm chainline

This absoluteBLACK 1x Oval Direct Mount Chainring for CINCH is designed exclusively for use with Shimano Hyperglide+ chains (CN-M9100, 8100, and 7100). Oval chainrings greatly improve traction and climbing abilities. They are crafted from CNC machined 7075 aluminum for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%. - This chainring will only work with Shimano Hyperglide+ CN-M9100, 8100, & 7100 chains due to the different thickness of the teeth - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - 3mm offset is designed for bikes with Boost spacing and fat bikes (when reversed) - Provides excellent weight-to-strength ratio

absoluteBLACK 1x Oval Direct Mount Chainrings for SRAM greatly improve traction and climbing abilities. They are designed for SRAM cranks that have a 3-bolt direct mount interface and removable spider and will only work with 12-speed Hyperglide+ chains. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - This chainring will only work with Shimano Hyperglide+ CN-M9100, 8100, and 7100 chains due to the different thickness of the teeth - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - 3mm offset converts any SRAM crank into Boost setup needed on Boost-spaced bikes - Designed for GXP, DUB, and long-spindle BB30 cranks - Provides excellent weight-to-strength ratio - 3mm offset is designed for 141/148 Boost spacing on standard DUB/GXP/long-spindle BB30, as well as 157 Super Boost spacing on dedicated Super Boost DUB cranks

absoluteBLACK Oval Direct Mount 1x Chainrings for Shimano greatly improve traction and climbing abilities. They are designed for Shimano XTR M9100, XT M8100, and SLX M7100 cranks and will only work with 12-speed Hyperglide+ chains. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - This chainring will only work with Shimano CN-M9100, 8100, & 7100 Hyperglide+ chains due to the different thickness of the teeth - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio

absoluteBLACK Oval Direct Mount Chainrings for e*thirteen greatly improve traction and climbing abilities. They are designed for use with e*thirteen TRS cranks. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2-14.4%, with timing of 110.5-116.3° after TDC (top dead center). - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - The unique, patent-pending narrow-wide tooth profile keeps the chain in place - Teeth have been 3D-machined for ultimate mud shedding and quieter operation - Provides excellent weight-to-strength ratio - 9, 10, 11, and 12-speed Eagle compatible - 49mm chainline

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for Shimano Dura-Ace 9100, Ultegra 8000, & 105 R7000 4-bolt cranks only. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - 10, 11, and 12-speed compatible - Ramps are designed specifically for a 50/34 combination - If only switching the inner chainring to oval, use all original crank bolts - 6.5% ovality is ideal for road climbing

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for Shimano 4-bolt cranks like Dura-Ace 9000, Ultegra 6800, 105 5800, and others. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - Not compatible with FSA cranks - If only switching the inner chainring to oval, use all original crank bolts - 6.5% ovality is ideal for road climbing

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed for Shimano 4-bolt cranks like Dura-Ace 9000, Ultegra 6800, 105 5800, and others. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - Not compatible with FSA cranks - 6.5% ovality is ideal for road climbing

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are for use with all pre-2014 Shimano 5-bolt cranks, such as Dura-Ace FC7950, Ultegra FC6750, Shimano 105 5750, and more. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - Use with absoluteBLACK long chainring bolts - If only switching the inner chainring to oval, use all original crank bolts - 6.5% ovality is ideal for road climbing

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are designed specifically for SRAM cranks that have 1 hidden chainring bolt behind the crank arm, such as RED, RED eTap, RED 22, Force 1, Force 22, Rival, Rival 1, and more. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - If only switching the inner chainring to oval, use all original crank bolts - Ovality is optimized for road climbing

absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are for use with all pre-2014 Shimano 5-bolt cranks, such as Dura-Ace FC7950, Ultegra FC6750, Shimano 105 5750, and more. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. - Oval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while riding - Chainring design reduces the possibility of leg cramps and allows you to maintain a better cadence while climbing - Use with absoluteBLACK long chainring bolts - 6.5% ovality is ideal for road climbing