Shimano Tiagra 4550 9 Speed Compact Chainset - 50/34T - 170mm Arm - Silver Handlebar Width_73cm Precision bottom bracket bearings are

Precision bottom bracket bearings are spaced further apart

The Ultra-Shift front derailleur is the lightest ever made by Campagnolo with in addition incomparable rigidity of the parts and operating speed

In-line cable adjuster with quick release

With Vivid indexing & 2-Way release

10k (g) breathability

Shimano Tiagra 4550 9 Speed Compact Chainset - 50/34T - 170mm Arm - Silver Handlebar Width_73cm Precision bottom bracket bearings areShimano Tiagra 4550 9 Speed Compact Chainset 50 34T 170mm Arm Silver This 2 piece cap free design Tiagra level 9 speed compact chainset offers unbeatable performance, sporting many features from the pro level equipment, this allows a quick and easy installation whilst delivering a lighter feel compared to the traditional crank bottom bracket assembly. If you need quick and positive shifting, then the SG X chainrings with its pick up pins and tooth