Just to update I brought a set of 'enduro3' with a 140 TT rear. When fitting the rear tyre I had a problem - I had 1/2 fitted the tyre and tried to fit the inner tube valve in but the tyre walls were so stiff I couldn't do it, I felt I need a Gynaeological tool to keep the tyre open ( I had fitted the previous 140 Conti ok). So I took the tyre off, fitted the valve first and carefully fitted the tyre 1/2 on over the valve, and finished off as per normal. front no problem, both tyres now running ok, first impression is good but need to put on some more miles on dryer roads.

Is there a trick I have missed when fitting tyres?