Originally Posted by
prairiepedaler
How does the I-Spec thing work? Is it like a regular thumbshifter? I've never ridden an indexed shift bike before.
It is a system by Shimano for flat bar shifters/brakes. It uses seperate trigger shifter and brake lever, but both mount to a single handlebar clamp (i.e. only the brake lever has a clamp). Sram has a similar system, the MatchMaker.