Motegi Traklites will fit but Traklite2 will not? Is it the 'Backside' measurement?

I love a certain wheel that only comes in 40mm offset and would like to know how much it would cost to shave a centimeter off the hub. Are there any drawbacks to this method? What should i look for in the yellow pages when searching for a place to do this?

the wheels is 18x7.5 and i would use 225/40 series tires. the application guide says they are good for the rx-8 (didnt have speed3 option) but i assume the rx-8s have more room on the inner wheel fender to run a 40mm offset. any insight would be appreciated.
 
I've been curious about this myself... I think it probably deserves a new topic. I'd imagine any competent machine shop could do it. How safe it is to do something like this should be discussed...

About going to a lower offset... It's confusing, but going from a 52.5 mm offset to a 40 mm offset will actually push the wheels out 12.5 mm.

The fenders are what we need to avoid the most.
 
Sorry to re-hash this old thread, but just thought I'd post a quick update...

I do not think I'm rubbing but it doesn't look like I have a lot of room to spare.
Here's a shot of my 235/45 17s (on 8" rims with 45mm offset) while my car was parked on some uneven ground. This is the driver's rear tire...

I haven't lowered my car BTW.
 
I've got a few messages with some questions about these wheels, so I figured I'd post the answers here...

I have had a little bit of rubbing. The only time I actually noticed it happening while driving was when I had 4 people (including me) in the car and I took a very long, moderately sharp curve (a highway interchange) going around 80. It was a left hand turn and the only place I saw rubbing was on the right-rear tire. I don't think lowering the car with this wheel/tire setup would be a good idea.

Although I haven't done it myself, I think "rolling the fenders" in the rear would probably fix the rubbing, possibly even if the car was lowered. The lip on the fenders is a good 1/2" that could be eliminated.

Maybe I should have posted this earlier, but I must say that I actually felt a fairly big difference in sidewall stiffness the very first time I made a U-turn. I went from the stock 18"s with summer tires to 17"s with all-season tires though, so I guess that's no surprise.
 
Thanks for answering the question Hirudin!
I guess maybe I'll look into something a little different. Maybe I'll just have to spend a little more money to get more expensive rims so I can shave all the weight I can.
 
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