I had the idea to use 4 OEM rear wheels on all 4 corners. The reason to do this is so i can fit 245/40 in the front and 255/40 rear.

If I use a 10mm spacer up front the wheels will have the same factory offset as the OEM fronts. Anyone ever try this? According to my calculations the 245/40 Tire will stick out .6 inches closer to the suspension and also stick out .6 inches more towards the outside fender then the OEM 215/45 tires. I could also use a different spacer to move the wheel in or out a little bit...

What do u think? Good idea or not??

 

You don't need a spacer, a 8.5" +65 will already stick out more than a 7" +55. A lot of people have done this but you need to bore out the wheel to fit over the larger front hub. The only reason to run a spacer is if you want to avoid boring out the wheel. In that case you should probably get spacers in the rear as well to match.

 

thanks for the reply. The reason I am considering a spacer is becase without one the tire will be a full 1 inch closer to the suspension and breaks. Do we have 1" of extra clearance to spare?

Rubbing on the suspension or fenders is my main concern. The car is totally stock and i intend to keep the suspension that way.

 

there is nothing for it to hit, dude

 

The wheel wont be 1 inch closer.

 

SebRed thank you for the response, but I disagree.

I used this site to calculate the tire and wheel positions compared to the OEM wheels. http://www.wheelsmaster.com/rt_specs.jsp

For the fronts:

Using the rear OEM wheels in the front with no spacers and a 245/40 tire the Tire(not the wheel) will be 1" closer to the suspension compared to stock. The Wheel itself will be .9 inches closer to the suspension compared with the stock wheel.

If I use the same rim with a 10mm spacer (this changes the offset to +55) the the Tire will only be .6 inches closer and the Wheel will be .6 inches closer then stock as well.



Turbosix: Are you sure about that? I recall reading about people who run 255s on all 4 corners having the wheel or the tire rub on the suspension or steering components when the steering is turned as far as it will go (like when making a tight U-turn).

The tricky part with putting a tire this wide on the front is finding an offset that fits between hitting suspension and hitting the fenders. Unfortunately I am a noob and have no idea what that magic number is or if its even possible.... It would be great if I could do this without rolling the fenders, but if there is no way around it thats what i will have to do. I would still like to know exactly how much clearance I have on the suspension sides of things.

 

Package is 35 mm (1.4'') closer to suspension/brakes components. Make sure that you have enough room for that. If not, consider lower offset, narrower tires or using spacers.
Fenders Package will stick out 15 mm (0.6'') farther. Acceptable for most cars.
Wheelwells Will fill out the wheelwell by extra 2 mm. Almost no difference


i do not think 1.4" on the inside is going to matter much, if you are worried, turn your wheels full lock and see what the closest suspension component is..