Shimano CS-HG400 Cassette - 9 Speed - Shimano HG Splined - 11-28T - Silver New Arrival If you're not sure which

If you're not sure which EPS size your helmet has it should be printed inside the helmet and visible when the headliner and cheek pads are removed

but is designed to work well in any temperature

Air Support™ Back Panel with Body Mapping Technology will help you keep cool

Rigid inner chassis to give consistency to the whole bag and protect from impacts

and a massive 556% range on the 12 speed cassette

Shimano CS-HG400 Cassette - 9 Speed - Shimano HG Splined - 11-28T - Silver New Arrival If you're not sure whichShimano's HG400 9 delivers reliable 9 speed mountain bike shifting performance and a durable, silver finish. Features Close gear steps between primary sprockets create smooth, comfortable pedaling Available in 11 28T and 11 32 Hyperglide technology Lightweight design Quick and easy assembly with cassette sprocket cap