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post #1 of 19 (permalink) Old 11-15-2010, 03:47 PM Thread Starter
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Fitting wider tires up front

I'm thinking of ordering a set of spacers for the car, so I can run a wider tire. I'm wondering what kind of extra stresses moving the wheel out an inch or more from the hub is going to put on the chassis. I'd like to be able to run at least a 265 to maybe a 285 wide tire up front. Or, if I were to go down to a 17" wheel, how wide could be fit up front?

Also, this combo would be run for autox, so lots of latteral loading with at least high end street tires, or DOT slicks

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post #2 of 19 (permalink) Old 11-15-2010, 04:01 PM
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I have 17x9s with a 255, and that looks like it's about all that it will take. Anything wider and it will start rubbing.

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post #3 of 19 (permalink) Old 11-15-2010, 04:31 PM
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Quote:
Originally Posted by Kelsey Smith View Post
I'm thinking of ordering a set of spacers for the car, so I can run a wider tire. I'm wondering what kind of extra stresses moving the wheel out an inch or more from the hub is going to put on the chassis. I'd like to be able to run at least a 265 to maybe a 285 wide tire up front. Or, if I were to go down to a 17" wheel, how wide could be fit up front?

Also, this combo would be run for autox, so lots of lateral loading with at least high end street tires, or DOT slicks
Don't waste your time or money on spacers they'll screw your offset up and look like crap.

245 is ideal and 255 is as big as I would recommend going on the front in any size rim.

Get some decent tires in a 245 or 255 and the the car will handle as well as you'll need it to.

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post #4 of 19 (permalink) Old 11-15-2010, 04:58 PM
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I can probably squeeze a 265 or 275 into my 26mm offset wheels without rubbing in the front

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post #5 of 19 (permalink) Old 11-15-2010, 08:17 PM
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IIRC, Will (Mercutio) runs 275's all the way around. You might ask him about the correct wheel offset.

I would advise against the use of spacers though.

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post #6 of 19 (permalink) Old 11-16-2010, 12:38 AM
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post #7 of 19 (permalink) Old 11-24-2010, 04:15 PM
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Well they fit, its super tight. I run 36mm offset on the front, offsets higher then do not attempt. Ill be updating the pics on SCCOA.com later tonight.
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post #8 of 19 (permalink) Old 11-24-2010, 06:58 PM
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Quote:
Originally Posted by Trunk Monkey View Post
Don't waste your time or money on spacers they'll screw your offset up and look like crap.

245 is ideal and 255 is as big as I would recommend going on the front in any size rim.

Get some decent tires in a 245 or 255 and the the car will handle as well as you'll need it to.
that is such good advice... not. why do you think you're such a guru? why wouldn't you run anything bigger than 255?

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post #9 of 19 (permalink) Old 11-24-2010, 08:48 PM
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Quote:
Originally Posted by Trunk Monkey View Post
Don't waste your time or money on spacers they'll screw your offset up and look like crap.

245 is ideal and 255 is as big as I would recommend going on the front in any size rim.

Get some decent tires in a 245 or 255 and the the car will handle as well as you'll need it to.
that is such good advice... not. why do you think you're such a guru? why wouldn't you run anything bigger than 255?

-John
Aren't we the Monday morning quarterback ... RICARDOA1 gets them to fit and I catch this flack. I'm looking forward to seeing his pictures, hearing how he got them to fit and seeing how well they work. Fitting them is one thing, having them perform well and look right is another thing entirely.

I'm not the guru. But I did sleep at a Holiday Inn Express last night.

Seriously though, I'm just quoting the gurus.

Brad (Cudaz101) and Fast ED over at SCCOA have confirmed what I said to be true. And racecougar also backed me up in post #5 on the recommendation against spacers. There are a number of reasons why. Read this thread and the one on SCCoA that is linked to here and do some research in the Tires/Wheels Forum to find out for yourself why.

Quote:
Originally Posted by fast Ed
My wheels were OEM Cobra wheels (+26) with some material shaved off, ended up at about +30. So that was part of why they hung out. But it doesn't really matter, look at cars that have +36 9" wheels tight to the spindle with a 255 tire ... the outer edge of the tire is pretty much even with the fender. A 275 width is just physically too wide to tuck under a stock MN-12 front fender, no matter what the wheel offset is.

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post #10 of 19 (permalink) Old 11-24-2010, 09:22 PM
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I got the pics up Ill just post them here. Offeset is crucial for this. Its tight but the contac patch will improve handling greatly. The cars are two tons of steel 245s was not doing it for me. I wont know how they feel till next season so use caution.

Rims are 36MM 18x9s Any variaton in that will affect your results. A lower offset will not be a problem but then your fender will start rub.




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post #11 of 19 (permalink) Old 11-24-2010, 10:08 PM
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So what size were the tires that you ended up going with? I think you were going to try 265s?


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post #12 of 19 (permalink) Old 11-24-2010, 10:48 PM
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Tire info over at sccoa.com along with more pics.
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post #13 of 19 (permalink) Old 11-25-2010, 12:32 AM
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I really dont care what anyone decides to do with their car. But for those that are interested in some specific comparisons between the 245-45-18 & 265-35-18 decide for yourself.

A 245-45-18 is optimal IMO, loads of choices, the correct height, fits perfect up to a 9" wheel and Ive never seen or heard of a case where it caused a bump steer.

A 265-35-18 is 25.3" vs 26.7" tall (Do the math here = TOO SHORT), has a load rating over 100 pounds less per corner (1433lbs vs. 1565lbs) and they weigh 3.5lbs more per tire on average. In every case Ive seen a tire 255MM and above has given Bump steer in road conditions other than perfect.


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post #14 of 19 (permalink) Old 11-25-2010, 08:44 AM
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Brad why are you comparing a 265 35 19? I dont think anyone has tried or is even considering trying it. Scroll back up
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post #15 of 19 (permalink) Old 11-25-2010, 10:30 AM
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the very first post says that he would like to run 265 to 285, pretty sure thats where he got it.

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post #16 of 19 (permalink) Old 11-25-2010, 02:05 PM
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Right and I just put on 265 40 18s which is nearly the same outer diameter then stock, unlike 265 35 18s which is a shorter diameter and something I would not recomend either. I know its confusing to read tire sizes but no one suggested a 265 35 18 and its clearly not what I just installed on my car.

And no a 245 vs a 265 on the same tire will not compare, It might be more comfortable to ride on 245s due to less wandering and pull, but for competition, racing or just wanting the best, bigger is better to a certain point on a heavy car.

Regards.
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post #17 of 19 (permalink) Old 11-25-2010, 11:16 PM
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Jeez and I thought that my offset and tires were tight. I'm currently using 40mm offset MB motoring wheels with 255/50/17's Nitto INVO's on all four corners. I doubt I'll ever try to go any larger on the fronts. I also had to clearance the excess nub off of the upper control arm ball joint.

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post #18 of 19 (permalink) Old 11-26-2010, 01:31 PM
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Quote:
Originally Posted by RICARDOA1 View Post
Brad why are you comparing a 265 35 19? I dont think anyone has tried or is even considering trying it. Scroll back up
Relax Rici, I in no way was describing your setup or even mentioned you. It was a simple description and comparison of two tire sizes and neither of them were 19", so you lost me a bit there but Im not asking for an explanation either so please dont take it that way.

Like I said...I dont care what anyone decides to run on their car but before making that decision look at all the specs of the size and be assured that anything wider than 245MM will give you a bump steer. So if thats something someone is OK with then go for it.

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post #19 of 19 (permalink) Old 11-26-2010, 01:43 PM
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Relax Rici, I in no way was describing your setup or even mentioned you. It was a simple description and comparison of two tire sizes and neither of them were 19", so you lost me a bit there but Im not asking for an explanation either so please dont take it that way.

Like I said...I dont care what anyone decides to run on their car but before making that decision look at all the specs of the size and be assured that anything wider than 245MM will give you a bump steer. So if thats something someone is OK with then go for it.

Brad


Yeah I messed up on the 19" quote should have been 18s Im chilling like cold ice. Im just not sure why you picked the 35 profile tire, you even made it clear it was a smaller diameter. 245s give wandering also I ran them for 2 years and they are fine for cruising and street driving. But when putting the car tru its phases it becomes clear that the car needs wider tires upfront.
Who knows maybe Ill hate the wander and need to go back to 245s but my car is not the most stock car here. But I ran 275s on a mustang that was nearly the same size as my SC so I know you can do more with a wider tire. The OP wanted to run wider tires and I was on the same trail, I am just passing along my bread crumbs as I puts along.
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