FC-R9200 Dura Ace 12 speed outer chainring, 54T-NJ for 54/40T 29er built with a breathable upper

built with a breathable upper and moderately stiff nylon outsole that combines comfort and pedalling efficiency

with no bike weighing more than 20kg

Waistband features internal silicon gripper to keep the jersey always in position while you pedal

Samsung 21700 cell li-on

a stout chromoly spindle and sealed cartridge bearings

FC-R9200 Dura Ace 12 speed outer chainring, 54T-NJ for 54/40T 29er built with a breathable upperThe Shimano Dura Ace FC R9200 12 speed chainrings are the perfect replacement for worn or damaged chainrings HOLLOWGLIDE hollow outer chainring technology, giving vast improvements in rigidity and increased weight savings, whilst also removing outer chainring flex, hugely improving shift performance making it precise even under high load The teeth have been developed to work only in conjunction with 12 speed chains for improved contact providing more