I bought myself a set of vert bbs rims for auto-x. I am planning to put slicks on them and i want to know what the widest tire i can put on the fronts is? My good rims have 215's so I know that would fit but any help would be much appreciated. Thanks.

i wouldnt go any wider than 225, and thats if youre using a stock height sidewall. The vert rims are only 6.5" wide. If you go to www.tirerack.com it will tell you the acceptable rim diameters for each tire under the tire specs.

So i could put 225 up front and not have it rub on my springs?

I have 225's on the front of my fc without any rubbing problems, but I have 16" rims. I dont think you would have a problem, as long as you dont go any taller than stock height though.

thanks

i run 225/45r17 on the frount of my fc with jic coil overs, on a 8" wide rim but needed a .250" spacer for clearance of the shock but on a stock stut there is no problem even running a 235 with the proper width wheel.

my mustang rims had 235-45-17's, no rubbing on the coil overs, but if i didnt have camber plates they would have been all over the fenders

The rim width will pose more of a problem than the shock clearance. Vert rims are 15 x 6.5. A friend of mine has 245's on the front of his fc with 5 mm spacers.

whats the advantage of taht?



id put skinnier tires

I wanna know how in the heck you get a 245 on a 6.5 inch rim, I have 215/55 on a 17x6.5 and it looks like a balloon.

I didnt say it was a 6.5" rim, it was a 16 x 7 s4 TII wheel, and it bulges a little, but its within the acceptable limits of the tire. My point was that 245's will clear the shock with a 5 mm spacer, so 225's will be just fine.

Ohh okay, I was like damn I need to learn this trick

i squeezed a 275/35R17, or maybe 275/40R17 onto a 17x7.



you can get most tires on any width wheel....its just a matter of how long itll hold, normally if i actually put that combo on a car (275width on a 7" wide wheel) after the tire warms up, do some cornering, it should implode, sucking the bead inward and unsetting it, causing an abrupt stop https://www.nopistons.com/forums/pub...IR#>/smile.png.



i'll have 245's on my 17x7's...until i can up it to some 17x9's in the rear....supposively you should only run up to a 235 on a 7" rim...whatever, ill be my own guinea pig https://www.nopistons.com/forums/pub...IR#>/smile.png.



kevin.

Thats what I heard, I dont think I want to try anything like what you are doing.

each tire has its own characteristics, ill be running toyos which should be fine because of the structure of their sidewall.



flimsy sidewall tires....aka michelin.... would definitely not like being on too wide of a wheel.



kevin.

What do you think of the G-force Sports? Thats what Im gonna be using on mine. 215/50/15 in the front and I was thinking 225/55/15's in the rear, on '91 na 5 stars.

g-force is made by who? BFG? if so ill tell you one thing right away....they wont last many miles lol. BFG's are however a very nice tire, good grip on most models etc. I think theyre the BFG's that youre talking about but let me know.



Honestly ive seen good performance out of toyo's, i liked the T1S but now they changed to the T1R. Toyo's are a little high priced.



I also have heard good things about Federal's SS595 i think it is, something like that, the name is blank to me at the moment. But i think all of those are low profile/large rim tires.

Just to let people know, I'm going to go with 215 all around. It seems easier and will work for what im doing, racing. Unless, would wider rear tires give me a little bit of an advantage on an auto-x race?

Yeah they are BFG's, I dont really care how many miles I get out of them, I get them cheap enough it doesnt matter. I liked my Sumitomo HTZR II's I had on my GSX blades. Those are a bad ass tire.

autocross I would imagine it would be better to have even sizes all the way around, plus low profiles so that the car doesnt lean over the sidewall much. However porsches, z06's etc etc all have staggered tire sizes so who knows.



i think to make your speedo exact, if you had 205/55r16's you need 215/50R16's, a 50 is a decent sidewall, not tooo big not very small. then again i dont think they make 215/50's so youll either get a 215/55 or 215/45. id prefer a 45 over a 55 for autocross, at least i figure itd be better.



kevin.

BFG offers a 215/50 for the G force sports.

so getting a low profile tire is better than stock? So a 215/45-15 would be a good choice?

Not necessarily. You may get slightly more outright grip, but when you lose it it'll be far less progressive because you'll lack that bit of flex in the sidewall.



Mark

What class will you be running in? Running a 225 or wider tire may bump you up to the next class depending on what else is done to the car.

^^ he said it pretty much perfectly.



kevin.

I'm in csp