E.Potter
Member
What I meant was running like a 315 on a 9.5 wide....something silly like that
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The quest for wider wheels and tires, 295, 305 and beyond...
- Thread starter Davidss2
- Start date
A couple of corvette guys I know did that with A7's on their fronts. I was worried about putting one on a 10.5"
.They worked well but I got some 11" now for my rear 315A7's & they fit better + room for more I'd think. 325 or 335 maybe? need to up the front to 315(really 325) minimumI already have 3mm and 5mm spacers. I'm looking for ways to go in between and have an effective 4mm. I don't see a way to order a 4mm spacer (except from Australia via ebay at like $100). And nobody seems to be selling 1mm or 2mm spacers (which I'd then use as 3+1 or 2+2). I've tried a few 'custom spacer' websites and they start at 3mm and then go to 5mm+. I suppose I could try to hit some local machine shops. Shouldn't be hard with a proper CNC machine.
E.Potter
Member
if it's down to the MM like that ...just adjust the camber a few ticks....really wouldn't take much adjustment...just a MM...lol
It's an option, but my front camber is already into the range that's not really daily-driving friendly. My plan is to roll the front fenders a bit, and then to actually reduce the front camber a bit. And extra mm to work with would be nice.
TacoSteve
Closed
I'm sure if you contact one of these spacer companies they can either make what you want or point you in the right direction.
Grab a 5mm spacer and hand it to a local machine shop and ask them to plane 1mm off.
Or do it yourself with a belt sander!
Or for a 1mm spacer, design your own and have it lasered out of an aluminum sheet.
Or get a universal 4mm one: CARiD
Or just pay the $100 for the sellers that are overseas where for some reason this is more common.
Or do it yourself with a belt sander!
Or for a 1mm spacer, design your own and have it lasered out of an aluminum sheet.
Or get a universal 4mm one: CARiD
Or just pay the $100 for the sellers that are overseas where for some reason this is more common.
Alright, instead of spending $$ on some odd spacer I took a side-quest:
So, I *think* I'm now good on clearance with my 305/30/19 RT660s. Did some random shake down driving on a nearby parking lot and so far so good. An autox event this weekend, we'll see how it goes.
On the rear clearance, I leaned heavily on info from @MasterC17 , who has MPP rear rotors, a +25 wheel, and had to dial almost 4 degrees of camber.
My wheels are +32 and I'm on OEM rear rotors, so between the offset and the rotors I had about 11mm extra to work with. So, I could probably get away with 2.5ish degrees of camber. At the moment I've dialed about 3. I may have to get tighter to the rear fenders if I get a ton of understeer.
On the front, based on @MasterC17's front clearance pic on a 19x10.5 +25 wheel I fully expected to add 7-8mm worth of spacers to my +32 wheel, but somehow ended up only needing a 3-4mm spacer. I'm on MPP front rotors, so, I guess, MasterC17 is currently on some front brake setup that doesn't push things out much compared to OEM.
I also had to reduce the compression stroke of my Redwood Ohlins. Without it, tires go deep into the wheel well at max bump, and no amount of fender rolling and/or camber would solve it.
For reference, I'm was on the lowest RW-recommended settings for the front - shock length of 630mm, and 12 mm of preload. I've cut the preload by 6mm to shorten the wheel bump travel (by about 8mm), and extended the shock free length by the same amount to try to get to the previous ride height. That should've worked in theory, unless I miss something, but I somehow ended up with a slightly higher front ride height. Maybe it's the MPP compression rod bushing inserts that I installed at the same time....
For the moment, I'm gonna try it as is, and maybe readjust again later.
So, I *think* I'm now good on clearance with my 305/30/19 RT660s. Did some random shake down driving on a nearby parking lot and so far so good. An autox event this weekend, we'll see how it goes.
On the rear clearance, I leaned heavily on info from @MasterC17 , who has MPP rear rotors, a +25 wheel, and had to dial almost 4 degrees of camber.
My wheels are +32 and I'm on OEM rear rotors, so between the offset and the rotors I had about 11mm extra to work with. So, I could probably get away with 2.5ish degrees of camber. At the moment I've dialed about 3. I may have to get tighter to the rear fenders if I get a ton of understeer.
On the front, based on @MasterC17's front clearance pic on a 19x10.5 +25 wheel I fully expected to add 7-8mm worth of spacers to my +32 wheel, but somehow ended up only needing a 3-4mm spacer. I'm on MPP front rotors, so, I guess, MasterC17 is currently on some front brake setup that doesn't push things out much compared to OEM.
I also had to reduce the compression stroke of my Redwood Ohlins. Without it, tires go deep into the wheel well at max bump, and no amount of fender rolling and/or camber would solve it.
For reference, I'm was on the lowest RW-recommended settings for the front - shock length of 630mm, and 12 mm of preload. I've cut the preload by 6mm to shorten the wheel bump travel (by about 8mm), and extended the shock free length by the same amount to try to get to the previous ride height. That should've worked in theory, unless I miss something, but I somehow ended up with a slightly higher front ride height. Maybe it's the MPP compression rod bushing inserts that I installed at the same time....
For the moment, I'm gonna try it as is, and maybe readjust again later.
MasterC17
Active Member
Well, after these got chewed up some at their first event, the energy use jumped to 350-380 Wh/mi on the way back...
what's the widest tires I can run with a 20x9 et 30 squared set up lowered with eibach sport springs?
TIA
I’d stay closer to the 255 range, check out the tire company’s recommended wheel spec for the size you @colindo1990 want to use.
Gimmethecash
Member
Doubtful you need a spacer. I run +35 19x9.5's with 275/35's and have no clearance issues.
Thanks man, I figured as much. Looks like I’ve got some more wheels that’ll work nicely then. I was gonna put 285 or 295 on a 30 profile on them but got a new job and have to drive a lot more for work now so car will see a lot more street use than I was expecting
I have completely stock M3P brakes. The red, bigger ones. Don't know what to say, my 275 Yoko A052's fit without any issues on two sets of +35 9.5" wheels, and his setup has 4 more mm of space. The extra wheel width shouldn't be the limiter given 10.8" section width of tire in both cases.
I've been trying to decide whether to go 18" or 19" for my track/autocross wheels and tires, so I generated the attached spreadsheet, based on data on TireRack.com. Definitely confirms for me that based on tire availability I'll be going with 19" wheels. Most likely 19"x10.5, 275-35-19.
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