Roll the fenders flat front and rear. Alignement after that and you should be good to go. Going to assume your aren’t slamming it since it’s track focused so you should have room to make it work all around.

 

I’ve been wanting to get wheels for so long, but am overwhelmed by fitment. This guide is amazing, but my fenders are mostly rolled, not fully, so I don’t know what offset will actually fit. I know rolled fenders allows me to go higher offset, but how much?

What’s the best way to find out what will fit with my fenders? Previous owner rolled them, so I have no idea what he made fit. I just want the TEs I’ve dreamed about for a decade+!

PS: I’m sure it’s a long shot, but if a friendly Ventura or LA S2000 owner reads this that could help in person that would be a god send. I don’t have car friends, so I feel lost with all this.

PPS: My limited understanding of offset makes me think higher offset would cause LESS rubbing compared to a negative offset. Why is that wrong?

 

Rolled fenders allow for lower offsets. Higher offsets mean the mounting pad is further from the center of the wheel, which results in more of the wheel being on the inside of the car and less poking out (I hope that makes sense, I tried to simplify but may have gone too far).

For example, if you were shopping between these three sets of wheels:

https://www.s2ki.com/forums/wheels-t...tires-1206840/ (17x8.5 +50 front, 17x9 +45 rear)

https://www.s2ki.com/forums/wheels-t...te37s-1206244/ (17x7.5 +48 front, 17x9 +65 rear)

https://www.s2ki.com/forums/wheels-t...-te37-1208923/ (17x7.5 +48 front, 17x8.5 +50 rear)

First let's start with the easy, the last two sets have the same offset and width front wheels, if you ran the same tire they'd fit the same.

In the rear, you're facing both a different width and a different offset. Width influences how a wheel fits in the fender, so a 17x9 +50 would fit differently from a 17x8.5 +50 (it would stick out 6mm further on the fender and go 6mm further into the wheelwell on the suspension side). With this in mind, a 17x9 +65, despite its wider wheel width, would actually stick out just under 9mm less than the 8.5 +50; while going 21mm further towards the suspension).

On the other end, if you compare the 17x7.5 +48/17x9 +65 to the 17x8.5 +50/ 17x9 +45 set, the fronts gain an inch of width, which divided by 2 translates to 12.7 mm, then the 2 mm higher offset means than the wheel (17x8.5 +50) would poke out on the fender side by 10.7mm more than 17x7.5 +48, and fill 14.7mm more on the suspension side. For the rears, the 20mm lower offset of the 17x9 +45 means the wheel pokes 20mm further out on the fender side and gives an additional 20mm of clearance on the suspension side as opposed to the 17x9 +65.

This all ignores the impact different wheel sizes have on how tires fit as well (the same size tire on a wider wheel can help ease fitment, to a point), the impact that lowering the car and changing the alignment has, etc.

 

I think we need to take a step back and figure out what your goals are?

is this aesthetic? Track focused? Staggered or non staggered?

Keep in mind, higher offset wheels allow you to play with fitment with spacers, but lower offset wheels don’t.

I track 17x9 +60 PF01s, which actually ever so slightly rub in the front and look quite sunken in the rear…but are functional.

personally, I’d run 17x9 +55’s in 245 all around which provides enough flexibility to use the same wheels for either looks/performance/both.

let us know your goals though and we can go from there.

 

I've long struggled with figuring out if I want a street queen, a track car, or both (if that's even realistic). I've never tracked my car but badly want to. I'd keep my stock wheels and tires for track days, assuming I finally make it out for one.

So I'd say I'm trying to figure this out for an aesthetic setup, and staggered to keep it feeling how it does on stock wheels. Not necessarily in these sizes, but I'm eye balling these because I've wanted TEs (call me basic) for years and years. Second option is CEs (basic b*$%h again) because they're amazing.

https://www.fitmentindustries.com/bu...-plus-18x95-38
https://www.evasivemotorsports.com/s...143-offset-45/

 

I've got a BSP wheel fitment question. Everywhere I look I get conflicting information. I'm trying to prepare for an 18x12 square setup to run 315's but I am having issues finding something that can work. CCW just jacked up their prices by a good amount so this is going to end up being a one shot investment. Does anyone have any fitment data on 12's up front? Can I fit it with a pull or will it need over fenders?

Quick info - Current car is a 05 full STR prep.

Any help would be appreciated or putting me in contact with someone that is good with this would be awesome too!

Thanks!
-Maniac

 

I don’t think there is anyway to fit 12’s in front without wider fenders. @s2000Junky this seems like your realm of expertise. I think urge has crammed some wide wheels under the car as well maybe hit them up.

 

If your building for purely a unlimited class/ track car, not street, then you can simply hack your stock front fenders back and get that tire pushed out about 3-4" to clear the inner fender/suspension and create some functional wheel travel gap, and go full swamp buggy. I've seen it done. But if your trying to actually fit a 12/315 up front and have the tire clear the inner and tuck the fender on the outer, then aftermarket fenders or custom has to be done. I cant say I'm aware of any off the shelf wider fenders that would even accommodate a 315 x12 up front, not without adding an additional lip and molding in. Typically 10.5"/285-295 max up front with typical 40mm wider Jays or CG front fenders.

 

I test fit some 8x11 wheels today to get rough estimations. I know I can fit the 18x12 in the rear with standard modifications. On the front I know I'll have to mod the fender. I am thinking I can take the stock fenders off to save them and get some metal wide fenders and just aggressively pull them to make them fit. I am going full BSP class which is unlimited wheel and tire on slicks. My only problem is finding something with the right offset or backspacing. My biggest concern is wheel fitment getting as close as I can to the coilover / swaybar / lower arm.

 

Do 17x9 +55 require any modifications (rolling fenders)? Or should fit with no rubbing?