Re-mapped TDI 90 on 15 inch wheels?

[depronman]

But there are good budgets and crap budgets
All tyres are not created equal
Paul


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[Robthebank]

As a keen cyclist and F1 fan, it’s amazing how much difference tyre pressure makes in different conditions, hence in those sports they are always going on about it. That could also be a key variable in your perceived “spin” V “less spin” set-up.