1
Golf mk7 / Re: Could someone look at obdeleven
« Last post by maxie on 07 October 2026, 20:58 »thanks, i'll try ringing them again.
Just had a play with this while looking at going from 225/40R18 to 235/35R19 on a GTI. Nice that it shows the speedo difference and the overall diameter change side by side, saves doing the sums on a bit of paper.
One thing that would be handy is a rim width check, so it warns you when a tyre is outside the recommended width range for a given wheel. Plenty of people here end up stretching or squeezing tyres without realising. Also a quick note on how much the speedo error matters for MOT purposes would help the less technical lot.
Good that you added inch inputs, that's a big improvement.



To average over 50mpg for a single trip tho like others posted, you mean downhill all the way i guess?