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Tire/rim width
I've seen this issue go by a few times, but I forgot :P
What's the widest you can go rim and tire width, in both the front and the back? ------------------ 86' GXL (All parts from this car will be going to the SE) Racing Beat Headers Sebring Exhausts, with Y-Pipe Blitz Intake No A/C & P/S 16" SportComp Electric Fan And all the suspension goodies... ------------------------- 86' SE in the works So far I've bought Erebuni rear skirt, and side skirts. The GTU wing, and next to come is the Type II front airdam from Border. Going to paint it white, and slap on white ADR DTM wheels |
8" front, 9" rear on stock fenders.
-Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
So then that means in front I can go with 225, and 245 in rear? Please correct me, this will be my first time buying racing wheels. https://www.rx7club.com/ubb/smile.gif
------------------ 86' GXL (All parts from this car will be going to the SE) Racing Beat Headers Sebring Exhausts, with Y-Pipe Blitz Intake No A/C & P/S 16" SportComp Electric Fan And all the suspension goodies... ------------------------- 86' SE in the works So far I've bought Erebuni rear skirt, and side skirts. The GTU wing, and next to come is the Type II front airdam from Border. Going to paint it white, and slap on white ADR DTM wheels |
225 up front, and actually 255 in back.
I'm not too sure what you're eyeing... Not all 225 wide tires will fit up front.  The offset of the rim is critical in making sure it fits.  There are some very "fat" 225 tires due to wider sidewall profiles (i.e. curb protection design).  +25mm offset on an 8" wide rim should fit up front - you might need to roll the fenders a bit for slight clearance problem, but this easily clear the inside shock. Th rears can easily swallow a 255 wide tire.  You can run a 9" wide rim with a +30mm offset no problem.  Some people have even run wider 265's in back, but it gets kinda tight with anything over 255. https://www.rx7club.com/ubb/smile.gif -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
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Hey Ted,
Do those numbers hold for both 15" and 16" wheels? My next move for autocross will be race rubber and I'd like to use 15's to keep the weight down. Thanks ------------------ Bill 88 GTU Eibach Pro-Line Springs KYB AGX Shocks |
Originally posted by BhamBill: Do those numbers hold for both 15" and 16" wheels? My next move for autocross will be race rubber and I'd like to use 15's to keep the weight down. Thanks -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
Im running 18X9 rims in the back on my turboII, and still need to buy fronts. Question, what offset are you guys using for your rims? Im going to be using a 17x7 with a 215/45 tire. I dont want to run spacers if i dont have to.
-seth 89 Competition Yellow Mica TurboII 88 323 GTX (AWD Turbo |
I have used:
18x8.5 with 225/35/18 front 18x9.5 with 255/35/18 rear I didn't have any problems running these size tires and rims, and I can actually put 265/35/18 in the rears with no problems. I also recall someone using a 10" rim on the rear of a TII without any problems as well. Offset is the key! ------------------ Richard NSXTASY 1BADRX7 |
I got in contact with the people I'll be buying my wheels from. Would a +38mm wheel offset fit fine in the rear with 245/45/17 tires, and 225/45/17 in front?
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I hate to throw this wrench out, but what kind of racing are you going to be doing?
Big diameter wheels means potentially same or taller gear ratios and more unsprung weight. |
For autocross, you'd be better off with 15 or 16 inch wheels. I run 15x7 wheels with 225/50-15 Kuhmo V700 R compound tires. With my springs and shocks, this setup is good for a little over 1.0 g's of lateral grip.
If you run 245's in the back and 225's in the front, you're gonna push/plow like crazy unless you've got some mad power and/or significant camber adjustments to help coax the rear around. The 225/50-15 will also give you shorter gears and a slightly lower ride height. If you haven't autocrossed much yet, don't even bother with R-compound tires until you've run several events. Not only are they sticky and expensive, but they're very easy to ruin/flat spot in a single day if you're not used to a lot of threshhold braking and cornering. This is, of course, just my .02 on the matter. ------------------ Chris '90 Sunrise Red 5 sp Convertible - Bonez intake & Super-flo cat - Drona-Max Cat-back - MD Racing ECU - Autocross Package - Tokiko 5 ways & Eibach Pros |
I don't want to use these wheels for the racing though, just for looks and daily driving. I have 15x7 wheels on my current rx7 with 225 on both front and rear, i'm planning on using these for just autocrossing. I've never done auto-x before, so this'll be my first time. I just want these for style https://www.rx7club.com/ubb/smile.gif
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Does this rule (225/255) change if you run coil-overs because you have more clearance inside the fenders? I want to run 245's up front!
------------------ Ephesian 4:1-7 |
go_speed_go - What offset are your 15X7's? I thought I'd use 7 or 7.5" wheels with the Kumhos too.
------------------ Bill 88 GTU Eibach Pro-Line Springs KYB AGX Shocks |
I knew of quite a few people back in Japan that ran with with 17x8 in the front and 17x9 in the rear. The common tire sizes they would use were 235/45R17 and 265/40R17 for the front and rear respectively. The fenders might have been rolled, I never checked, but they were normal fenders. https://www.rx7club.com/ubb/cwmsmilies/cwm5.gif
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Ok, I know that for the stock wheels on the Turbo II, their offset is +40mm, so would 245/45 tires fit that 16x7 wheel with a +40mm offset?? If not, what can be done to make them fit?
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Oops, this was like a double post. My browser is kind of screwy.
[This message has been edited by Jerk_Racer (edited March 07, 2001).] |
I want to auto-x
------------------ 86' GXL (All parts from this car will be going to the SE) Racing Beat Headers Sebring Exhausts, with Y-Pipe Blitz Intake No A/C & P/S 16" SportComp Electric Fan And all the suspension goodies... ------------------------- 86' SE in the works So far I've bought Erebuni rear skirt, and side skirts. The GTU wing, and next to come is the Type II front airdam from Border. Going to paint it white, and slap on white ADR DTM wheels |
What's the widest meats that will fit on the stock TII wheels? Is it 255 or 245?
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Originally posted by Sebring7: I got in contact with the people I'll be buying my wheels from. Would a +38mm wheel offset fit fine in the rear with 245/45/17 tires, and 225/45/17 in front? The rears are fine 8". -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
Originally posted by Flamin' NOS: What's the widest meats that will fit on the stock TII wheels? Is it 255 or 245? -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
Originally posted by E6KT2: Does this rule (225/255) change if you run coil-overs because you have more clearance inside the fenders? I want to run 245's up front! -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
Originally posted by Sebring7: Ok, I know that for the stock wheels on the Turbo II, their offset is +40mm, so would 245/45 tires fit that 16x7 wheel with a +40mm offset?? If not, what can be done to make them fit? -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
Originally posted by RETed: How wide of a rim? 7" wide rim up front with that kinda offset will fit a 225 tire but NOT with a 7.5" or 8" or wider rim. The rears are fine 8". -Ted |
I have a quick question about the stock TII rims... i just bought some for racing and was wanting to know if the Kumho 245/45/16(i think?!) would fit on the front and back??
if not i dont think kuhmo makes less wide ones for the front do they?? keep in mind these are for race only so would they still be aight? jason ------------------ ~~~~~~~~ 86 GXL ~~~~~~~~~ ~Apexi N1 Dual ~2.5" Race Pipe ~Bonez Intake ~3" Straight ABS Intake Hose ~TII Fuel Pump ~6 Ports Via Airpump ~8mm ignition wires ~blue silicon vacuum lines ~17" Konig J-specs ~215/45/17 Dunlops ~Phoenix Gold Competition Stereo ~Recaro Seats ~Tinted Windows ~2650 lbs. ~0-60mph @ 7.01 seconds (Gtech) ~1/4 Mile 15.41 @ 95.4 mph (Gtech) ~See it all at http://www.geocities.com/rx_treme http://rxtreme.50megs.com/little_gxl.gif |
Originally posted by BhamBill: go_speed_go - What offset are your 15X7's? I thought I'd use 7 or 7.5" wheels with the Kumhos too. Here's what they look like: http://www.geocities.com/go_speed_go/wheels.html [This message has been edited by go_speed_go (edited March 06, 2001).] |
Originally posted by Rx_treme: I have a quick question about the stock TII rims... i just bought some for racing and was wanting to know if the Kumho 245/45/16(i think?!) would fit on the front and back?? if not i dont think kuhmo makes less wide ones for the front do they?? keep in mind these are for race only so would they still be aight? -Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
yeh i have been readin them but i just figured that since one of my race buddies runs 245 all around that i could too.
So with this "flex" on the side wall it would be better to 225/50/16 all around?!?! i just figured wider the better.... hmm thanks Jason |
On (stock) 7" rims, it is recommended to run 225 wide tires - anything wider will just buldge the sidewalls, and the car will feel like jello due to the sidewall flex.  Initial turn-in transition and how quick the streering reacts has a lot to do with sidewall flex...
-Ted ------------------ Ted Koseki Technical Advisor http://www.k2rd.com/ |
I just bought a set of Koneg Impacts a couple of weeks ago off of a TII that was getting parted out. I think they are 17x7.5...maybe 17x7, not sure. They have 215/45's up front and 235/45's in the rear. I can definately see room for more in the rear. I moved the 235's up front to check clearances and they are maybe 1/4" to 3/8" from the strut assembly and a little more on the fender-side. I could see running 235's up front for street use if you're just cruising, but a nasty bump while you're turning would definately do some fender damage.
The 215's in the front are perfect, and I could really use another 1/2" of rim and tire out back to have the same fender overhang as the front. I'll have to agree with the rest of the guys here, 225/235 looks like the limit up front, unless you are just a cruiser and take it easy. Brian '90 GTU [This message has been edited by Sledgehammer (edited March 06, 2001).] |
I need this info *bump*
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what offsets will keep the wheel even with the fenders using:
front- 215/45-17 on a 17x7 back- 245/40-17 on a 17x8 i'm guessing i will need a different offset in the front and back but that is not a problem. |
A friend of mine runs a Discount Tire here in Arlington and he test fitted several sizes on my car and 225/50r16,17,18 is all thats gonna fit due to the strut (coilovers cant help the clearance issue). The only solution to wider tires is a fender kit, rolling the fender, or relocating the strut farther inward.
Also 245 is as wide as you can go in the back on stock rims. Removing the Muffler shields opens up lots of space for maybe a 275 even but definatly only on aftermarket rims Listen to Ted ya'll he is full of good advice. He hasnt steered me wrong yet :D Thanks Ted |
ARDT2 (Rishie) said this was the best setup for widest tires on a FC or soemthing along those lines
Front: 17"x8" 225/45 +38 Rear: 17"x9.5" 255/40 +35 |
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