Silex 400 II1 Gravel Bike 2025Versatility never goes out of style. The SILEX 400 is an adventure ready gravel bike thats equally at home doing a rough commute or winter training laps, thanks to a durable aluminium frame, lightweight carbon fork and huge tyre clearance of 700 x 45 mm or even 42 mm tyres with fenders. Our MTB inspired geometry gives you huge confidence off road, the huge number of mounts mean youll be able to carry what you need easily, and the durable Shimano 2x10