I am waiting on delivery of a 2015 Chausson 718EB on a new Ford chassis which has been increased to 4.1t. I have tried emailing Chausson to find out what they do to the chassis to increase the capacity to this figure (it costs another £800) but have no reply to any of my emails, and Highbridge couldn't tell me either as Ford supply the chassis to Chausson direct. My question however is how does the increased carrying capacity change the speed limits I can go on dual carriageways and derestricted roads? I know when you go over 3.5t the limits drop to 60 and 50 mph, but does this apply to the actual weight of the vehicle (its just over 3.1t I believe unladen) or the plated capacity? This is all new to me, so sorry if I am being a bit dim. Thanks.