Discussion
This sounds simple....... but what is the correct tyre size for a mk1 Tuscan. Im on 18" wheels, well the car is. Yes I have been on the sites and got all the sizes and they are all the same sizes just 245/40/18 or 255/40/18 on the rear, thought I would check tyre calculator not quite the same diameter by 17mm, so now thinking about speedo issues, I think that when new 16" wheels were standard 225/45/16 all round so no problems there. but tyre calc says big problems 44mm dif or 1 3/4 in old money lots of possible answers here I think, If this was a euro box and looking to fit aftermarket wheels and tyres you would not go with these sizes, the recomended dif is 2.5% max these are 7.22% The 18" size dif is 2.6% so in TVR world thats spot on, but joking apart I hope I have got this wrong or there is a logical answer
Non S MK1s on 18" wheels were fitted with 235/40 front and 245/40 rears as standard. They originally used 35 series but the 40 profile improved handling.
I use 235/40 front and 255/35 rear. Some people use 225/40 front as the sidewall height more closely matches the 255/35 rear.
If your car is standard '00 front geometry then technically your better off with 235/40 fronts plus 3mm spacers if you haven't already got them.
I use 235/40 front and 255/35 rear. Some people use 225/40 front as the sidewall height more closely matches the 255/35 rear.
If your car is standard '00 front geometry then technically your better off with 235/40 fronts plus 3mm spacers if you haven't already got them.
Edited by Basil Brush on Thursday 21st February 11:12
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