No prob-gotta start somewhere

LBS= Local bike shop

Grip shifter= the shifting mechanism is contained in the handlebar grips---works like the throttle on a motorcycle. The reason i don't like them is that it is too easy to shift accidently if you happen to change your grip on the handlebar

Rapid fire/trigger shifter= both the front and rear derailer are controlled by a set of 2 "triggers" on the handlebar. CLick the trigger=shift gears.