tyre stretching

[woodsnasty6n]

Hi there i was reading some passed comments regarding the limits to stretching a tyre?

I found this info very useful.

Spec | Sidewall | Radius | Diameter | Circumference | Revs/km | Difference

185/55-14 102mm 280mm 559mm 1756mm 569 0.0%

195/45-15 88mm 278mm 556mm 1748mm 572 -0.5%

185/45-15 83mm 274mm 548mm 1720mm 581 -2.1%

165/50-15 82mm 273mm 546mm 1715mm 583 -2.3%

165/45-15 74mm 265mm 530mm 1663mm 601 -5.3%



So the 165-50 will be fine and i'v seen it on a number of euro cars but has anyone done this in the uk, as i can get hold of the tyres quite easily but geting some one to fit them is a different story!

Can any one help at all??