Shimano Ultegra FC-R8100 Ultegra 12-Speed Double Chainset Seatposts but can fit up to

but can fit up to 40 mm tyres when you want more off-road versatility

Screw-on interface prevents slippage on the handlebar

Serrated top pattern and bottom to anchor shoes even in wet conditions

Max weight capacity 25kg (55 lb)

overlapping steel shells protect the internal steel cable

Shimano Ultegra FC-R8100 Ultegra 12-Speed Double Chainset Seatposts but can fit up toDescription The HollowTech II 12 speed Ultegra chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders HollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load The chainring teeth have been developed to work in conjunction with 12 speed HG chains for