RingDrive™ Ring Sets for Boost, Superboost, Classic, and ISO hubs

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This is where the bees live, the heart of the Chris King RingDrive™. These parts are compatible with Boost, ISO, Superboost, Classic, Tandem, Single Speed, Uni-Disc, and BMX hubs.

PHB525 - 72T Drive and Driven Ring Set
PHB977 - 36T Drive and Driven Ring Set

The 72T Drive and Driven Ring Set is the standard in all our MTB hubs. It's designed for immediate engagement (read: traction, agility, and power), and is best for XC, trail, and really any pedal-intensive riding.

The 36T Drive and Driven Ring Set is gravity-focused. While still providing reasonable engagement, it's really focused on minimizing drag and noise (read: downhill speed). This set is best for downhill racers and shuttle-junkies.

RingDrive ^TM

We live by the ideal that a product is not worth making unless you make it better. When developing a rear hub, many engagement systems were tried and the RingDriveTMprevailed as the best of the best.

The system consists of three primary parts: the Drive Ring, the Driven Ring, and the Driveshell (freehub). The design allows us to move the engagement mechanism inside the hubshell, inward of the large hubshell bearing, allowing it to have more contact area than a traditional freehub design, and better mitigate torque from the drivetrain. The Drive and Driven Rings are made of heat-treated stainless-steel and have 72-points of simultaneous engagement (45-points in the R45 road hubs). These provide ample, positive engagement, and are capable of handling a torque load of over 800ft/lbs, three times greater than other high end hubs we tested!

RingDrive™ Ring Sets for Boost, Superboost, Classic, and ISO hubs

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This is where the bees live, the heart of the Chris King RingDrive™. These parts are compatible with Boost, ISO, Superboost, Classic, Tandem, Single Speed, Uni-Disc, and BMX hubs.

PHB525 - 72T Drive and Driven Ring Set
PHB977 - 36T Drive and Driven Ring Set

The 72T Drive and Driven Ring Set is the standard in all our MTB hubs. It's designed for immediate engagement (read: traction, agility, and power), and is best for XC, trail, and really any pedal-intensive riding.

The 36T Drive and Driven Ring Set is gravity-focused. While still providing reasonable engagement, it's really focused on minimizing drag and noise (read: downhill speed). This set is best for downhill racers and shuttle-junkies.