by MH3.0R » Tue Apr 19, 2011 8:01 pm
One of the important aspects in wheel dimensions is the offset. The standard wheel offset is +55 mm. I got some 19x8 with +45 offset loaded with KU31 225/35 88Y tyres and had to have the guards rolled. I would suggest that a 20 inch is going to mean you will need to either maintain the +55 mm offset and stay with 8 inch width rims plus roll the guards in advance. Also, have the rims and tyres trial fitted and then have a knowledgeable person estimate the room left for suspension travel, cornering, braking etc. Make sure your purchase is subject to these checks prior to committing otherwise. If you only have the standard suspension, then it could be a nightmare with 20 inch as there will be no way to stiffen the suspension and reduce the travel. I am by no means an expert, but just sharing some potential pitfalls.
There is a dedicated Wheels and Tyres thread that is worth reading several times.
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