The lad across the rode had a Raleigh Burner 20 bought for him for Christmas. The Freewheel has buggered and now spins freely and i went to replace it for him today with a new threaded freewheel.... The problem is that the Burner back hub looks to have the freewheel incorporated into the hub... its like a casstte/freewheel hybrid and wont take a threaded freewheel even though it looks just like one... Any ideas