shomeda- Posted November 14, 2012 Report Share Posted November 14, 2012 I am looking to get some new shoes for the SHO.. I just have a couple of questions about the following: What is a comfortable width that we should use? What is our Bolt Pattern? What is our Offset? What would be a good Backspace? Quote Link to comment Share on other sites More sharing options...
racerx78 Posted November 15, 2012 Report Share Posted November 15, 2012 I don't know all the info. I know we have 20x8 with a 39mm offset on the '13 SHO's. I know for my race wheels i'm going with a 20x9 38mm, while running a 275/40 tire. It only sticks out .6" more than stock which is fine since i'm not lowered. That 275/40 also matches perfectly with the stock tire height so you don't have to worry about throwing off your speedo. Quote Link to comment Share on other sites More sharing options...
bigPelo Posted November 15, 2012 Report Share Posted November 15, 2012 stock tires 245/45R20 have 28.68in diameter 275/45R20 will be 29.74in Dia, 3.57% more 265/40R20 will be 28.34in Dia, 1.19% less I personally won't go over 3% difference... To answer ShoMeda$: 1. anywhere between 245 and 275 should be ok 2. 5x114.3 3. racerx78 got it right 38-39mm, so you should be ok between 35 and 42 approx. Quote Link to comment Share on other sites More sharing options...
racerx78 Posted November 15, 2012 Report Share Posted November 15, 2012 stock tires 245/45R20 have 28.68in diameter275/45R20 will be 29.74in Dia, 3.57% more 265/40R20 will be 28.34in Dia, 1.19% less I personally won't go over 3% difference... To answer ShoMeda$: 1. anywhere between 245 and 275 should be ok 2. 5x114.3 3. racerx78 got it right 38-39mm, so you should be ok between 35 and 42 approx. Thanks, i meant to say say 275/40 not 45. 275/40 is the same dia. as 245/45 the we have stock. This is the best rim and tire calculator site out there. This is what i use to see if i can make a setup work. Rims-N-Tires: Calculator Quote Link to comment Share on other sites More sharing options...
bigPelo Posted November 15, 2012 Report Share Posted November 15, 2012 WOW! nice tool! I use to go to 1010tires.com but it's not as good as this one. Quote Link to comment Share on other sites More sharing options...
racerx78 Posted November 15, 2012 Report Share Posted November 15, 2012 Yea they make it very easy to see what you can do. I used it when i went from 18x8 with 225 to 17x8.5 with 255's on my MS3. Tire shop said it couldn't be done. That said it could. I had the shop do a test fit and the site was correct, and i ran and race on those tires for 2 yrs and didn't have a problem until i lowered the car, and even then i just had to ad .5 degrees of negitive camber. Quote Link to comment Share on other sites More sharing options...
bigPelo Posted November 15, 2012 Report Share Posted November 15, 2012 Yea they make it very easy to see what you can do. I used it when i went from 18x8 with 225 to 17x8.5 with 255's on my MS3. Tire shop said it couldn't be done. That said it could. I had the shop do a test fit and the site was correct' date=' and i ran and race on those tires for 2 yrs and didn't have a problem until i lowered the car, and even then i just had to ad .5 degrees of negitive camber.[/quote'] And negative camber is not bad while racing: Quote Link to comment Share on other sites More sharing options...
racerx78 Posted November 15, 2012 Report Share Posted November 15, 2012 Yes sir this is that car with the wider wheels. it worked great. Quote Link to comment Share on other sites More sharing options...
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