ACS Maindrive Headset IS42/25.4|IS42/26 Black CheckoutSpec= (140-170) 30.9x408-438mm A zippered internal storage pocket

A zippered internal storage pocket and included integrated rain cover add additional value and usability

and chainstays all have integrated protection that stays close to the frame

this is the lightest performance driven damper yet

1-Bike Add-On Compatible 2” Cam Only (40lb/Bike)

This freehub supports Kickr Move `18 `20 Edition Kickr Kickr V6 and Kickr Core with most Campagnolo 10 11 and 12 speed cassettes

ACS Maindrive Headset IS42/25.4|IS42/26 Black CheckoutSpec= (140-170) 30.9x408-438mm A zippered internal storage pocketCNC machined alloy tops with sealed mechanism 45 45 degree bearings Available as 1" (25. 4mm), 1 1 8"(28. 6mm) and 1 1 8" to 1" reducer Model Maindrive IS S. H. I. S. IS42 25. 4 IS42 26 Color Black Weight 93g Size 1" (25. 4Mm) 1"