Shimano Ultegra FC-R8100 12 Speed Chainring cassons Dual head nozzle compatible with

Dual head nozzle compatible with Presta and Schrader valves and 1x neoprene sleeve to help avoid freeze burn

Efficiency = speed

For internal wire routing

Sold as a pair of valves (enough for one wheelset)

2mm stainless steel tubing bent in the same graceful curves as our original model

Shimano Ultegra FC-R8100 12 Speed Chainring cassons Dual head nozzle compatible withChainring for the Shimano Ultegra FC R8100 and FC R8100 P 2x12 speed cranksets. The 110 mm bolt circle diameter ensures fast, smooth shifting, and for weight optimization, the outer ring also features a Hollowglide construction that still delivers extreme stiffness. Specifications Outer: aluminum (anodised), carbon fiber reinforced plastic (CFRP) Inner: aluminum (anodised) Mfr Claimed Weight TBC Refresh your Ultegra front shifting with this chainring,