Zipp Replacement Freehub Body for Firecrest (ZR1 SS) Variant:SRAM XDR we're able to reduce the

we're able to reduce the amount of insulation material required

Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal

Flare: 4 degrees

FeaturesLining material: Resin (3rd generation)Less noise and better modulation40% better wear resistance than H01AProvides long pad life and less fade by cooling technologyPad shape: Narrow type

the Speedcraft is fully loaded with our most advanced technology for the ultimate in sports performance

Zipp Replacement Freehub Body for Firecrest (ZR1 SS) Variant:SRAM XDR we're able to reduce theFreehub body suitable for Zipp ZR1 disc brake and rim brake rear hubs. The ZR1 hub can be converted with this freehub body for the use of Shimano 11 speed road cassettes. Specifications Material: aluminum axle type : 12x142 mm thru axle or 5x135 mm quick release Compatible hubs: Zipp ZR1 hubs (disc and rim brake version) Compatibility: Shimano 11 speed Road Mfr Claimed Weight 68g