just to add to my previous post, they were called suicide nobs(think bird mentioned that) also wrist breakers, probaly not so now with power steering but when u had a tough machine to steer they helped, TILL the front wheels caught a hole and the wheels would turn, the steering wheel would turn, the nob would turn, AND YOUR WRIST DID NOT TURN(ouch). don't think that will be a problem with ur machine. so if u like it , get one!