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Old 05-10-2016, 11:15 PM   #9
Smallblock454
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Join Date: Jun 2014
Location: LB, Germany
Posts: 1,453
Hello James,

if you want to stay the distance to the inner rim parts the same, you will need:

- 10 mm spacers in the front (wheel comes out 12 mm on the outside, rolling circumference: +1,3 %, ground clearance: +40 mm, speedo difference: -1.2 %)

- no spacers in the rear – you have +1 mm that the wheel comes out on the inside (wheel comes out 25 mm on the outside, rolling circumference: 0 %, ground clearance: 0 mm, speedo difference: 0 %)

The tyre can be wider especially in the rear. So you have to check clearance in the rear anyway. The front seems to be the no difference. But be prepared that a 225 wide tyre mean that it's exactly 225 mm wide. There might be slight differences. Somme are some mm smaller, some are some mm wider. So you have to test clearance any way.

You will have less understeer.

Winter tyres i would only recommend only if you live in a colder area and need a lot of traction for a short time, or you have wet conditions. If the winter tyres are new i would not recommend them for racing – they will be too soft in dry conditions. If they are older (which means the rubber is getting harder), give them a try but don't be surprised if they didn't last very long.

Regards, Markus

Last edited by Smallblock454; 05-10-2016 at 11:23 PM.
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