When we purchased a new steel wheeled Bailey Ranger Series 5 in November 2006 we also purchased a new Stronghold alloy wheel clamp - the one with the u bend - which we were assured would be suitable. We have now purchased a new 2013 Coachman Amara which has alloy wheels. Does anybody know if we need new wheel bolts? The stronghold web site lists 3 different lengths but retailers don't even seem to ask what caravan it is for when they sell one. Out of interest we compared our bolt with one off a new Coachman at our dealers and ours was very slightly shorter, had less of a shoulder although at the same angle and was shiny compared to the much rougher surface on the Coachman bolt.