SRAM X-Sync Eagle 12sp Boost DM Chainring 38t Polar Gray Overall Length (mm)-163 Flat contour yet still comfortably

Flat contour yet still comfortably padded

TRP ultra-grippy semi-metallic pads

}Surly Ultra New Rear Hub - Threaded x 135mm 6-Bolt Fixed Black 32H

Parts for servicing Zipp hubs

SRAM X-Sync Eagle 12sp Boost DM Chainring 38t Polar Gray Overall Length (mm)-163 Flat contour yet still comfortablyNewly redesigned X Sync 2 provides better chain retention resulting in a smoother more efficient pedal feel. New aggressive tooth profile reduces friction and debris build up for superior longevity. Compatible with all Sram Eagle 12 speed and Sram 11 speed 1x drivetrains. Robust forged and machined aluminum for ultimate strength. Designed to pair flawlessly with the Eagle chain TECH SPECS Mount Compatibility Direct Mount Teeth 38T Type Material Spec