Shimano Tiagra FC-4550 50 / 34 Tooth Compact 10 Speed Chainset - 170mm - Silver Headsets Rapid rise rear derailleur with

Rapid rise rear derailleur with smart cage

but there's no denying that no one thinks a huge helmet looks cool

Hydration ready

Powerful wind protection in a stretch thermal knit for superior mobility and warmth

Shimano Tiagra FC-4550 50 / 34 Tooth Compact 10 Speed Chainset - 170mm - Silver Headsets Rapid rise rear derailleur withShimano Tiagra FC 4550 50 34 Tooth Compact 10 Speed Chainset 170mm Silver Sporting many features from pro level equipment, this 2 piece cap free design Tiagra chainset offers unbeatable performance. Fitted with SG X chainrings that feature strategically placed chain pick up pins and tooth profiles to ensure fast and positive shifting. Anodized aluminium crank arms Lightweight aluminium chainrings Designed to work with HollowTech II type bottom bracket