Shimano GRX 2 X 10 SpeedBraze-On Front Derailleur Compatio_Enriched efficient and durable compound in

efficient and durable compound in the center of the tire with a tackier compound on the shoulder

The SHIMANO UN26 bottom bracket offers smooth rotation for square taper cranks

With RR-E compound and Race Shield Puncture Protection

make sure your specific trainer will accommodate the width of the thru-axle equipped bike that you are using

Shimano GRX 2 X 10 SpeedBraze-On Front Derailleur Compatio_Enriched efficient and durable compound inThe SHIMANO GRX RX400 front derailleur offer lighter front shifting operation and easier setup thanks to the new link construction and integrated cable tensioner. It features a 2. 5mm outboard chain line design to allow wider tire clearance for mixed terrain riding. Lighter front shifting Ergonomic power curve New link (toggle) construction Natural stroke feeling Wider tire clearance Chainline +2. 5 mm vs. conventional road FD Compatible with up to 42