Wheels

Silky smooth DT Swiss internals laced to OCLV Carbon rims make the Aeolus XXX one set of feather-light wheels that is made to be ridden. Key features: - OCLV XXX carbon utilizes premium materials and resins with industry-leading domestic manufacturing - Stacked lacing alignment provides a better spoke bracing angle for a stiffer wheel - OCLV Carbon tubular rim, 21mm outer rim width - DT Swiss based hubs with 36 tooth star ratchet and SL driver body - DT Swiss Aerolite spokes and Alpina alloy locking hex-head nipples - Compatible with Shimano 10/11spd, SRAM 10/11 freehubs - Includes Bontrager Carbon Stop Cork pads and quick release - No rider weight restrictions

Confidently run a deeper, faster wheel with Aeolus XXX 4. Industry-leading crosswind stability combines with best-in-class aerodynamics to give this 47mm carbon road wheel an incredible speed advantage. The wide profile of the tubular rim bed delivers more tire support for that classic Aeolus ride quality, all with a best-in-class weight. The Laser Control Track enhances braking performance. - OCLV XXX carbon uses premium materials and high temperature resins with industry-leading domestic manufacturing - Speed Stability Shaping reduces side force, allowing for a deeper depth and faster profile - Laser Control Track ensures confident braking performance in all conditions - 47mm rim depth provides unmatched stability and confidence for an all-conditions aero wheel - Tubular rim profile with shape optimized for tubular cyclocross tires - DT Swiss internals for a buttery smooth ride feel and reliable 36-point star ratchet engagement - Laser-etched graphics provide a fast, finished look with no added weight - Includes Bontrager Black Prince Carbon brake pads and internal cam quick release

Shimano's Dura-Ace C24 series carbon clincher laminate wheelset, you’ll experience a faster, smoother and more responsive ride. Expect to out-accelerate and out-climb the competition. It boasts increased rigidity for improved drivetrain efficiency and lightweight titanium hubs for reduced friction. - 24mm rim depth - Wider hub flanges for increased stiffness - Clincher - Responsive acceleration - Carbon laminate rim

- Size : 700c - Model : Aeolus 9 D3 TLR - Holes : 18 / 24 - Color : Black - Finish : Nude - Type : TLR/Clincher - Valve : Presta - Rim : Symmetric (front), Asymmetric (rear)

A carbon road wheel with a 51mm depth that pairs our latest rim profile with Pro-level pricing to deliver an easy upgrade in speed, weight, and stability. Fast and lightweight The versatile Aeolus Pro 51 delivers the latest Aeolus rim profiles for unmatched speed and stability performance at Pro-level prices. The strong, lightweight Pro-level OCLV Carbon allows for faster, more stable rim profiles. These Tubeless Ready rims feature a wider 23mm inner width that's proven to roll with less drag, adding to the overall speed gains. Silky-smooth hubs rolling on DT Swiss 350 internals deliver a fast and quick-rolling ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If you structurally damage your wheels while riding in the first two years of ownership, we'll replace them. It's that easy. Product details - Pro OCLV carbon offers an optimized blend of weight, strength, and durability - 51mm depth rim profile born of 3D design modeling for our fastest, most stable design ever - 23mm inner width proven to roll smoother with less drag for a faster wheel and tire system - Tubeless Ready (TLR) rims allow for quick transition to a tubeless system - 51mm depth OCLV Carbon rim (30mm outer, 23mm inner width), DT Aerolite spokes 24/24, DT Pro Lock nipples - Smooth and reliable DT Swiss 350 hubs with 18-point engagement, SRAM/Shimano 10/11 freehubs, 12sp available - Centerlock disc hubs with 12mm thru-axle front and rear, axle swap available for QR and 15mm - Includes TLR rim strip, TLR valve, and traditional rim strip

A light, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Good things last A lightweight carbon mountain bike wheelset ready to tackle any trail and stand up to that rock you just didn't see. Line Pro 30 features best-in-class strength and durability and even helps prevent pinch flats. Plus, simple tubeless setup makes it easy to unlock their full potential and run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - Ultra-durable OCLV Pro carbon provides a lighter layup for the ultimate in lightweight strength - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear DT Swiss Competition Race 14/17G spokes with Alpina alloy locking nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

The lightweight Dura-Ace C40 Carbon Clincher wheel is the ultimate all-rounder. Yet, it’s still aero thanks to the wide rim you’ll see at the C40. This carbon wheel has an increase in rigidity for improved aerodynamic performance, while maintaining a comfortable riding experience. Its braking, handling and acceleration are top notch. - Responsive acceleration - Wide section rim - Carbon laminate rim

There has never been a better time to upgrade to the feel and performance of carbon wheels. Aeolus Pro 3 TLR is a full carbon, tubeless-ready rim brake road wheel that balances durability, weight, and aerodynamics for pro-level performance that doesn’t break the bank. We started with a proven 35mm-depth shape and added a confidence-inspiring brake track to make a carbon road wheel available to all. Key features - D3 Dual Directional Design profile cuts drag at tire-leading and rim-leading edge - OCLV Pro carbon offers an optimized blend of weight, strength, and durability - Tubeless Ready (TLR) rims allow for quick transition to tubeless system - Confidence inspiring brake track increases stopping power while dissipating heat - 35mm depth OCLV Carbon rim (27mm outer, 19.5mm inner width) DT Aerolite spokes and Alpina locking nipples - Quick release hubs, Bontrager 24 point engagement, 3 pawl hub - Compatible with Shimano 10/11 speed, SRAM 10/11 freehubs - Includes TLR rim strip, TLR valve, valve core removal tool, Black Prince carbon pads, and traditional rim strip

The carbon difference If you want a lightweight XC wheel that's ready to race, look no further than Kovee Pro 30. It features a lightweight design and 29mm internal width for better traction and cornering performance so you can ride faster and with more confidence. Plus, the Rapid Drive 108 hub provides near instantaneous engagement so you get out exactly what you put in. - OCLV Pro carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 108 hub instantly transfers effort into forward momentum - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148 wider hub flanges enhance bracing angle for a stiffer wheel - Ultra-durable OCLV Carbon rim with 29mm internal, 36mm external width, 28 hole front/rear - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, valve core removal tool

Wonderfully wide Instantly upgrade your traction and cornering performance with the Line Pro 40. The wide, durable, and lightweight carbon rim perfectly supports plus tires. The wheels are built around Rapid Drive 108 hubs for near-instant engagement to keep you powering through even the most challenging terrain. Key features - OCLV Pro carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 108 hub instantly transfers effort into forward momentum - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Boost 110/148 and Stacked Lacing dramatically increase wheel stiffness - Ultra-durable OCLV Carbon rim with 41mm internal, 46mm external width, 28 hole fr/r - 28 front/rear DT Swiss Aerolite 14/17G bladed spokes with Alpina alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes 21mm TLR tape, TLR valve, valve core removal tool

A carbon road wheel with a 51mm depth that pairs our latest rim profile with Pro-level pricing to deliver an easy upgrade in speed, weight, and stability. Fast and lightweight The versatile Aeolus Pro 51 delivers the latest Aeolus rim profiles for unmatched speed and stability performance at Pro-level prices. The strong, lightweight Pro-level OCLV Carbon allows for faster, more stable rim profiles. These Tubeless Ready rims feature a wider 23mm inner width that's proven to roll with less drag, adding to the overall speed gains. Silky-smooth hubs rolling on DT Swiss 350 internals deliver a fast and quick-rolling ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If you structurally damage your wheels while riding in the first two years of ownership, we'll replace them. It's that easy. Product details - Pro OCLV carbon offers an optimized blend of weight, strength, and durability - 51mm depth rim profile born of 3D design modeling for our fastest, most stable design ever - 23mm inner width proven to roll smoother with less drag for a faster wheel and tire system - Tubeless Ready (TLR) rims allow for quick transition to a tubeless system - 51mm depth OCLV Carbon rim (30mm outer, 23mm inner width), DT Aerolite spokes 24/24, DT Pro Lock nipples - Smooth and reliable DT Swiss 350 hubs with 18-point engagement, SRAM/Shimano 10/11 freehubs, 12sp available - Centerlock disc hubs with 12mm thru-axle front and rear, axle swap available for QR and 15mm - Includes TLR rim strip, TLR valve, and traditional rim strip

A light, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Good things last A lightweight carbon mountain bike wheelset ready to tackle any trail and stand up to that rock you just didn't see. Line Pro 30 features best-in-class strength and durability and even helps prevent pinch flats. Plus, simple tubeless setup makes it easy to unlock their full potential and run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - Ultra-durable OCLV Pro carbon provides a lighter layup for the ultimate in lightweight strength - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear DT Swiss Competition Race 14/17G spokes with Alpina alloy locking nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

A light, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Good things last A lightweight carbon mountain bike wheelset ready to tackle any trail and stand up to that rock you just didn't see. Line Pro 30 features best-in-class strength and durability and even helps prevent pinch flats. Plus, simple tubeless setup makes it easy to unlock their full potential and run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - Ultra-durable OCLV Pro carbon provides a lighter layup for the ultimate in lightweight strength - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear DT Swiss Competition Race 14/16G spokes with Alpina alloy locking nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

The carbon difference If you want a lightweight XC wheel that's ready to race, look no further than Kovee Pro 30. It features a lightweight design and 29mm internal width for better traction and cornering performance so you can ride faster and with more confidence. Plus, the Rapid Drive 108 hub provides near instantaneous engagement so you get out exactly what you put in. - OCLV Pro carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 108 hub instantly transfers effort into forward momentum - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148 wider hub flanges enhance bracing angle for a stiffer wheel - Ultra-durable OCLV Carbon rim with 29mm internal, 36mm external width, 28 hole front/rear - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, valve core removal tool

An industry-leading wheelset that makes upgrading to carbon wheels an easy decision. Rapid Drive 108 hubs provide instant engagement, while OCLV Carbon rims add confidence with best-in-class strength and durability. Line Pro 30 wheels crush the competition and are ready to conquer any trail. Key features: - OCLV Pro Carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 108 hub instantly transfers effort into forward momentum - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148 and Stacked Lacing dramatically increase wheel stiffness - Ultra-durable OCLV Carbon rim with 29mm internal 36mm external width 28 hole fr/r - 28 front/rear DT Swiss Aerolite14/17G spokes with Alpina alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, valve core removal tool

- Original equipment replacement rims for Bontrager Rhythm wheels - Tubeless Ready Design - Optimize with Bontrager TLR Tire Sealant, Tubeless Ready rim strips, valve stems, and tires - Welded seam - Presta valve - Model : 2014 Rhythm Pro Carbon - Holes : 28 - Color : Black - Finish : Nude - Type : Tubeless/Clincher - Valve : Presta - FT/RR/PR : Dual - Rim : Asymmetric - Weight : 400g

Feel the carbon difference Get a better ride feel, shave weight, and add stiffness to your ride with the Kovee Elite 30 wheelset. These wheels were designed with XC and trail riders in mind, with lightweight OCLV Carbon rims and a wide 29mm inner width. Product details - OCLV Pro Carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 54 hub instantly transfers effort into forward momentum - Tubeless Ready (TLR) rims allow for quick transition to tubeless system - Ultra-durable OCLV Carbon rim with 29mm internal, 36mm external width - Carbon Care Wheel Loyalty Program offers no-cost replacement or repair of rim for first two years of ownership - 28 front/rear 14G spokes with Alpina alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, and valve core removal tool

Feel the carbon difference Get a better ride feel, shave weight, and add stiffness to your ride with the Kovee Elite 30 wheelset. These wheels were designed with XC and trail riders in mind, with lightweight OCLV Carbon rims and a wide 29mm inner width. Product details - OCLV Pro Carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 54 hub instantly transfers effort into forward momentum - Tubeless Ready (TLR) rims allow for quick transition to tubeless system - Ultra-durable OCLV Carbon rim with 29mm internal, 36mm external width - Carbon Care Wheel Loyalty Program offers no-cost replacement or repair of rim for first two years of ownership - 28 front/rear 14G spokes with Alpina alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, and valve core removal tool

A strong, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Warrantied for life This durable carbon mountain bike wheelset keeps the good times rolling. It delivers performance on any trail and durability against any rocks you can't avoid. Line Elite 30's robust rim profile delivers best-in-class strength and durability and resists pinch flats. Plus, simple tubeless setup makes it easy to run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - OCLV carbon offers an optimized blend of weight, strength, and durability - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear Grand Forza 14/15G spokes with Alloy hex nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

A strong, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Warrantied for life This durable carbon mountain bike wheelset keeps the good times rolling. It delivers performance on any trail and durability against any rocks you can't avoid. Line Elite 30's robust rim profile delivers best-in-class strength and durability and resists pinch flats. Plus, simple tubeless setup makes it easy to run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - OCLV carbon offers an optimized blend of weight, strength, and durability - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear Grand Forza 14/15G spokes with Alloy hex nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

Affordable Aero Combine state-of-the-art aerodynamics with the benefits of tubeless ready, and you've got the Aeolus Comp 5 TLR road wheel. A classic aluminum rim with a seamlessly attached 50mm carbon fairing combine for a proven aero profile that has been wind tunnel tested to be incredibly fast. Aeolus Comp 5 TLR is a proven high-value option for the aero-conscious rider. Key features - Rim construction combines lightweight aluminum rim with a bonded carbon fiber fairing - Tubeless Ready (TLR) rims allow for quick transition to tubeless system - Aluminum with carbon rim construction (23mm outer, 17.5mm inner width) - Compatible with Shimano 10/11 speed, SRAM 10/11, - Includes Bontrager TLR rim strip, TLR valve stem, internal cam quick release, and traditional rim strip - DT bladed spokes 18fr, 24r, Alpina locking nipples - No rider weight restrictions

Admit it—your bike would be a whole lot sweeter if you were riding carbon. Enter the Kovee Elite 23 wheelset. Designed with the XC and trail rider in mind, these Boost-width wheels will shave weight and add stiffness to your ride. Key features: - OCLV carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 54 hub instantly transfers effort into forward momentum - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Boost 110/148 wider hub flanges enhance bracing angle for stiffer wheel - Ultra-durable OCLV Carbon rim with 22.5mm internal 29mm external width 28 hole fr/r - 28 front/rear 14/15G spokes with alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, valve core removal tool

Admit it—your bike would be a whole lot sweeter if you were riding carbon. Enter the Kovee Elite 23 wheelset. Designed with the XC and trail rider in mind, these Boost-width wheels will shave weight and add stiffness to your ride. Key features: - OCLV Carbon offers an optimized blend of weight, strength, and durability - Rapid Drive 54 hub instantly transfers effort into forward momentum - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148 wider hub flanges enhance bracing angle for stiffer wheel - Ultra-durable OCLV Carbon rim with 22.5mm internal 29mm external width 28 hole fr/r - 28 front/rear 14G spokes with Alpina alloy locking nipples - 6 bolt disc, Shimano 10/11 speed, SRAM XD driver available separately - Includes TLR rim strip installed, TLR valve, valve core removal tool

Smooth rolling and confidence inspiring Key features - Stacked Lacing - Provides a better spoke bracing angle for a stiffer wheel - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Offset spoke bed reduces wheel dish for stiff and stable performance - 6061 alloy rim 23mm outer, 19.5mm inner width, 3 pawl hub - Shimano 10/11, SRAM 10/11, Campagnolo (freehub sold separately) - Includes Tubeless Ready (TLR) rim strip, TLR valve stem, internal cam quick release - No rider weight restrictions

Cross is always coming Ready for your call-up? Punchy accelerations and twisty off-camber corners are no problem for this cyclocross-specific tubular wheel. The lightweight alloy rim has a wide profile specifically designed to support cross tires and features 108 points of engagement so that every ounce of energy you put down moves you forward, fast. Key features - Light and durable alloy tubular rim designed for cyclocross use - Rapid Drive 108 j-bend hub instantly transfers effort into forward momentum - 142/100 spacing with 12mm thru-axle front and rear, convertible to 15mm/5mm QR fr or 5mm QR rear - Center Lock disc hubs with interchangeable axles increase compatibility - 24 hole fr/r with DT Swiss bladed spokes, Alpina locking nipples - Designed and tested with elite riders from Telenet Fidea Lions - Compatible with Shimano 10/11 speed, SRAM 10/11 freehubs, XD driver available

A tubeless-ready disc brake road wheel that mates a carbon fairing and slippery aero profile to a classic aluminum rim. The feel of free speed What do you get when you combine state-of-the-art aerodynamics with the benefits of tubeless-ready? Say hello to Aeolus Comp 5 TLR Disc road wheel. This wheel features a classic aluminum rim and seamlessly attached 50mm carbon fairing for a proven aero profile that's been wind tunnel tested to be incredibly fast. Aeolus Comp 5 TLR Disc is the high-value option for the aero-conscious rider looking to ride fast and stop on a dime. - Rim construction combines lightweight aluminum rim with a bonded carbon fiber fairing - Tubeless Ready (TLR) rims allow for quick transition to a tubeless system - No rider weight restrictions

Light, smooth, and durable Paradigm is perfect for the cyclist looking for reliable, durable performance at a great value and is packed with many of the features of our higher end wheels. Paradigm features a tubeless ready (TLR) design for easy tubeless conversion and stacked lacing which provides a better bracing angle for a stiffer wheel and more responsive ride feel. Choose Paradigm TLR road wheels for lasting durability and performance that won't break the bank. Product details - Tubeless ready (TLR) rims allow for quick transition to tubeless system upgrade - Offset spoke bed reduces wheel dish for stiff and stable performance - 6061 alloy rim 23mm outer, 19.5mm inner width, 3-pawl hub compatible with Shimano 10/11 speed, SRAM 10/11 freehubs - Includes Bontrager TLR rim strip, TLR valve stem, internal cam quick release - No rider weight restrictions

A wide rim profile supports tires for unmatched traction and cornering. Product details - Original equipment replacement Bontrager Line Comp 40 TLR wheels - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Extra wide alloy rim (44mm outer, 40mm inner width) is perfect for Plus tires - Shimano 10/11 speed, Micro Spline and SRAM XD driver available separately - Does not include skewer, reflector, rim strip, valve, or owner's manual

- Original equipment replacement rims for Bontrager Rhythm wheels - Tubeless Ready Design - Optimize with Bontrager TLR Tire Sealant, Tubeless Ready rim strips, valve stems, and tires - Welded seam - Presta valve - Model : 2014 Rhythm Elite - Holes : 28 - ERD : 535mm - Color : Black - Finish : Anodized - Type : Tubeless/Clincher - Valve : Presta - FT/RR/PR : Dual - Rim : Asymmetric - Weight : 470g

Shimano's Track Dura-Ace Hi-Flange Hubs build up into stiff, fast spinning wheels that want to sprint right out off the line. Stainless steel bearings and Borozon treated bearing races minimize drag for maximum efficiency and speed. You get your choice of single or double-sided cog threading.