I've got Speedy wheels on my America. The only required mod not alreay mentioned is that you will need the speedy brake resivoir if you are going to run the twin disk brakes. There was a long discussion on this a while back about proper braking force and that the america res. may fail on dual front calipers. I didn't notice a difference but I didn't want to take the chance of a failure. If you are trading parts be sure to swap the res. too as it is engineered as part of a complete brake circut. NR
