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Woody's SS wheel widening project!


woody81

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I liked the idea of wider tires on the front, so i put the 10" rims with 275/35/20 Pirelli's on on the front of the SS. There appears to be plenty of room up front and Robert M said he hasn't had any issues, so I went that route. Now for the rears. I sent my 9" rims to Eric Vaughn to have them widened to 12". I measured them when they came back and the are a little shy of 12", they measure out to about 11 3/4" when using a standard tape measure. I really wanted to try the new 335/25/20 Michelin Pilot Sport Cup ZP's that are on the new ZR1 Corvette. I thought they would be way to wide, but I decided to give them a try. I had the tires mounted and put them on for a test fit. With NO spacers, I have 5/8" clearance between the inside of the tire and the inside of the wheel well. The outside bulge of the tire is the exact same as the original stock tires. The 335/25/20 Michelin Pilot Sport Cup ZP tires are about 3/4" shorter overall compared to the 275/35/20 Pirelli's. Road tests will come in the spring, after the salt washes away and everything warms up.

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I liked the idea of wider tires on the front, so i put the 10" rims with 275/35/20 Pirelli's on on the front of the SS. There appears to be plenty of room up front and Robert M said he hasn't had any issues, so I went that route. Now for the rears. I sent my 9" rims to Eric Vaughn to have them widened to 12". I measured them when they came back and the are a little shy of 12", they measure out to about 11 3/4" when using a standard tape measure. I really wanted to try the new 335/25/20 Michelin Pilot Sport Cup ZP's that are on the new ZR1 Corvette. I thought they would be way to wide, but I decided to give them a try. I had the tires mounted and put them on for a test fit. With NO spacers, I have 5/8" clearance between the inside of the tire and the inside of the wheel well. The outside bulge of the tire is the exact same as the original stock tires. The 335/25/20 Michelin Pilot Sport Cup ZP tires are about 3/4" shorter overall compared to the 275/35/20 Pirelli's. Road tests will come in the spring, after the salt washes away and everything warms up.

 

 

Woody - From the side view in your first picture, I can see the diameter difference.

 

So that 335/25 is closer to 27" overall diameter.

 

I wonder if there is a 275/30 that could be used on the front, and then lower the car to the tire diameters?

 

 

R

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Woody - From the side view in your first picture, I can see the diameter difference.

 

So that 335/25 is closer to 27" overall diameter.

 

I wonder if there is a 275/30 that could be used on the front, and then lower the car to the tire diameters?

 

 

R

 

 

+1

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I'm gonna give these new Michelin Cups a try to see how good they hook up. I think I should put the 255/35/20 Pirelli's back on the front 10" rims so it looks more symmetrical for now. :spend: I want to keep the great look of a Super Snake, and I want it to hook up and GO!

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  • 1 month later...

Beautiful day today! 80 degrees and sunny. So I went out for the test run with my new Michelin's. I drove nice for about 30 miles. Every time I would take off in first gear I would still get wheel spin. So I did a small, maybe 5 second, burnout. Then drove about 5 miles and practiced some launches. First gear is a full traction launch. No wheel spin at all. Once these Pilot Sport Cup's are heated up they hook up great! I didn't feel or hear any rubbing. I'll have to put her up on the lift to get a better look. So far, so good.

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I switched out the 275/35 Pirelli's on the frount and put my old 255/35 Pirelli's on the frount 10 inch rim. Now the frount tires are only 3/8 inch taller than the rear. There wasn't any rubbing from the 275's on the frount, I just wanted a shorter tire on the frount so it looks more symmetrical with the rear tires. While the snake was on the lift, I took off the rear 335/25 Michelin Pilot Sport Cup's for inspection. There isn't any rubbing at all. Here are some new pictures.

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  • 4 weeks later...

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