POST 1 / ORIGINAL POSTEROriginal post
These are the stock 17" twists. What's the largest size tires I can put on my wheels. I'm thinking 225/45-17 on the front and 255/40-17 on the rear. ???
3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
Discussion summary
YOUR RESEARCHPutting R-compound tires on OEM wheels.
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 3 captured posts examined · 0 partial discussions
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
- Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
POST 2Original post
Yes, you can install a 225 on the front 7" wheels. However, its effectiveness would be questionable. The ideal wheel width for that size tire is 7.5".
POST 3Original post
NickS - I went through the same eval for R-compound tires about a month ago and chose to go with the stock size 205/50 and 255/40 combo due to limited availability in the 225/45 size. I was looking for a tire I could drive to the track on safely. The only options in the 225/45 size for the front with corresponding matched rear tire are the V700s, Pirelli Corsa, and MPSCs. However, MPSCs are spec'd at a minimum rim width of 7.5"s, the Pirelli's are on back order for months and the V700s aren't ideal for driving back and forth to the track on. I ended up going with Toyo RA-1s and have been pretty happy. It was my first set of R-compound tires and they break away fairly linearly and actually squeel at the limit which most r-compounds do not. While the adhesion limit goes up significantly, the car retains its heavy understeer bias with the stock sizes. To dial this out I believe you need a larger front tire -- but on wider than factory rims. I got a more agressive alignment with -0.6 negative camber (most they could get out of stock suspension) that helped a little but the car still understeers heavily. Next step for me is 18-8.5" wheels with a 235 or 245 front tires. It would be great to hear from others that have been able to dial out the understeer bias.
This is a source reference. Confirm exact model applicability in the original material.