The Speed Guide is a classic piece of DMR design…simple, dependable, reliable and race proven. The Speed Guide combines the functions of the Chain Cage and Chain Reactor into one robust and easy to set up chain device. The sealed bearing PU pulley and adjustable lower arm keep your chain in close contact with the chainring and the Stainless Steel cage keeps things under control at the top.

BMX BB size too

BB mount chain device

Fully adjustable upper cage and lower guide

Tough and durable stainless steel construction – will not rust

28.6mm seat tube clamp - 31.8 and 34.9 clamp available on request