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15x9/15x8 tire size ?

  #26  
Old 12-08-2016, 08:09 AM
Lt. Dan
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Originally Posted by Dr. Spade View Post
Really? I don't see Rivals treadblocks helping to evacuate water any more than Hoosiers
Errr, that's because they don't... LOL
 
  #27  
Old 12-09-2016, 08:42 AM
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Originally Posted by ojannen View Post
I am running 6uls 15x9 front and 15x8 rear. Rivals 225/45 all around. The rears could use a 2mm spacer for a little more clearance to the rear trailing arms. The fronts need a 15-20mm spacer to clear the brakes on my car. There is quite a bit of poke on the front so you need to be careful with suspension travel as well.

The 8" wheels fit the 225 section tires about right and the 9" wheels have a bit of stretch.

I don't think there are any 245 options on Rivals/RE-71s. I would probably switch to 245s at least in front.
Hankook RS4 should be coming out soon. I'm sure with time to spare for Nationals 2017. They'll have a 245/40. But that's running really small diameter now. Smaller than 225/45

Originally Posted by mega72 View Post
why dont you like the short ratio? my speedo is 10mph off but the ratio is great for AX/track, lots more pickup
1st gear useless, 2nd will top out at the airfield we sometimes use. Car has enough power to move as is.
 
  #28  
Old 12-09-2016, 09:54 AM
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I like the extra power from lower gearing. Our courses are too tight for me to hit rev limiter, they typically run 2 events per year we can get into 3rd but gearing wont matter you are still going to get into 3rd with taller tires
 
  #29  
Old 12-12-2016, 10:06 AM
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Originally Posted by mega72 View Post
I like the extra power from lower gearing. Our courses are too tight for me to hit rev limiter, they typically run 2 events per year we can get into 3rd but gearing wont matter you are still going to get into 3rd with taller tires
I'll try it again. Maybe it was just that course and I didn't give it a chance.

Perhaps 205/50 on a 15X7 would be better for a little more diameter at the expense of sidewall flex as opposed to the current 15X8.

I heard Wilcox ran 15s on his STX Mini even tho its a JCW. Those brakes clear?
 
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Old 12-12-2016, 10:34 AM
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Got my 15x9's mounted on the car. Tire clearance is not a concern, but with a 12mm spacer, things are still pretty tight in the back. Very close to the trailing arm. Front with coilovers I have tons of clearance.
 
  #31  
Old 12-13-2016, 04:47 AM
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Originally Posted by Lt. Dan View Post
Tire clearance is not a concern,
So is there room for 245s?

 
  #32  
Old 12-13-2016, 05:05 AM
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"maybe" on the front- I don't think there is enough clearance in the back though...
 
  #33  
Old 12-13-2016, 05:29 AM
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my setup rub on the coilover adjusters with 205's how much spacer did you run on those 15x9 up front, and what size are those tires?
 
  #34  
Old 12-13-2016, 06:10 AM
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The current setup is a 15x9, 36mm offset, with 12mm spacers front and back. Tire size is a 225/45/15 BFG Rival S.

The old setup was a 15x8, 20mm offset, 205/50/15 Bridgestone RE-71's... Didn't need a spacer for that:

 
  #35  
Old 12-13-2016, 07:18 AM
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Dang that photo (and Craig's results) really make me want to run STX.
 
  #36  
Old 12-13-2016, 08:15 AM
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Man, R53s just seem to pull off the smaller diameter better.

Also how are you not hitting fenders with that amount of poke?

How much camber do you have?

#cambergang #static #illest
 
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Old 12-13-2016, 08:45 AM
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it makes them ride LOW too, look how low that front air deflector thing is

I think STX is a nice place to be, works well in HPDE too, it's too bad they dont let us run pulleys
 
  #38  
Old 12-13-2016, 09:42 AM
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Originally Posted by Dr. Spade View Post
Man, R53s just seem to pull off the smaller diameter better.

Also how are you not hitting fenders with that amount of poke?

How much camber do you have?

#cambergang #static #illest
front camber is at 2.7 degrees, rear is just under 2(non-adjustable right now)

I'm running a fairly stiff setup, but combine the short uptravel these cars have with a big front bar, and the wheel honestly doesn't move up in the fender opening a lot...
 
  #39  
Old 12-13-2016, 09:45 AM
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Originally Posted by mega72 View Post
it makes them ride LOW too, look how low that front air deflector thing is
I rubbed the airdam a lot on the 205's, but have a little more clearance with the 225's... I picked up a replacement for when it gets too ratty for 20 bucks at the junkyard.
 
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Old 12-13-2016, 09:50 AM
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This was earlier in the season with a tow hook camera mount:

You can hear that it doesn't rub during competition at all, but at the very end leaving the lot you get a nice "crunch"... LOL
 
  #41  
Old 12-13-2016, 11:54 AM
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One of our main spots for autox is BB&T Center (Panthers Stadium) where it's full of V dips in the parking lot. Stock Vettes and 911s always hit their air dams.

I'd definitely take out a fender there using your wheel/tire set up. I have fixed camber plates in front. Aligned at -2.2F -1.5R. Going to see if there's any minuscule amount I can add in front and I'll add to rear accordingly. Ideally I want -3F -2R.

Also I'm on Koni Yellows and Swift springs (4.5K F 5.5K R) so it's not particularly stiff. Stock sway bars.
 
  #42  
Old 01-09-2017, 02:05 PM
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Originally Posted by Dr. Spade View Post
...Aligned at -2.2F -1.5R....

...Also I'm on Koni Yellows and Swift springs (4.5K F 5.5K R) so it's not particularly stiff. Stock sway bars.
Wow, you are on the exact setup I am about to order. I was not expecting -2.2F camber with only the 0.7 drop. Did you run the plates with the stock height springs and if so, what was the camber then, if I may ask. Also, I thought I had read that you DD the car as well, how is the wear at 2.2?

I have the Hsport Comp RSB, so that will be a slight difference.
 
  #43  
Old 02-17-2017, 07:59 AM
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Originally Posted by Chili_head View Post
Wow, you are on the exact setup I am about to order. I was not expecting -2.2F camber with only the 0.7 drop. Did you run the plates with the stock height springs and if so, what was the camber then, if I may ask. Also, I thought I had read that you DD the car as well, how is the wear at 2.2?

I have the Hsport Comp RSB, so that will be a slight difference.
I've stopped DDing it. Bought a 1.8T Jetta and have been using that since Jan.

Camber wear wasn't bad at all while I did DD. I have Ireland Eng fixed camber plates up front. It's really a 1.1" drop that gets reduced to 1" with the plate. It works well enough; the plate has a hole for the Koni adjuster. I have new Eibach adjustable plates laying around but no hole.
 
  #44  
Old 04-17-2017, 11:34 PM
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Originally Posted by Dr. Spade View Post
I'll try it again. Maybe it was just that course and I didn't give it a chance.

Perhaps 205/50 on a 15X7 would be better for a little more diameter at the expense of sidewall flex as opposed to the current 15X8.

I heard Wilcox ran 15s on his STX Mini even tho its a JCW. Those brakes clear?
Actually I have a Mini Cooper S non-jcw with the JCW tuning kit option. This allows for the TCE performance 11.75" Front Brake kit which easily fits most 15's. I'm running a 15x9 Front and 15x7 rear. For 2017 I'll be running a 245 40 15 up front and 225 45 15 in the rear. My tire choice is the Rival 1.5, at least up front. I'll test the 1.5 in the rear as well as the 2016 Rival S. My front springs are only 5" long which allows the wheel/tire to sit under the bottom spring perch to allow for extra inside clearance. I have a 6" spring now that I'm going to possible test fit to see if I can make it work since on some courses where there are big bumps I seem to possibly be either running out of spring travel or running out of shock travel(which would require raising the front a bit or using longer springs) which causes bouncing. I'm running the Storm S1 15x9 up front in a 35mm offset but am also using a 10mm spacer. I have the extended stud kit to allow for enough threads since I'm using a spacer. Anyway sorry for the long post, just throwing some info out there..... :-)
 
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Old 04-17-2017, 11:57 PM
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15x9 front 15x7 rear. Please ignore my sloppy bunper trim lol<br/>
 
  #46  
Old 04-18-2017, 03:24 AM
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I am looking forward to the new rivals. Extra grip plus extra width. I am still on 225s all around with a stretch in the front.
 
  #47  
Old 08-07-2017, 10:22 AM
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Originally Posted by OasisT View Post
Actually I have a Mini Cooper S non-jcw with the JCW tuning kit option. This allows for the TCE performance 11.75" Front Brake kit which easily fits most 15's. I'm running a 15x9 Front and 15x7 rear. For 2017 I'll be running a 245 40 15 up front and 225 45 15 in the rear. My tire choice is the Rival 1.5, at least up front. I'll test the 1.5 in the rear as well as the 2016 Rival S. My front springs are only 5" long which allows the wheel/tire to sit under the bottom spring perch to allow for extra inside clearance. I have a 6" spring now that I'm going to possible test fit to see if I can make it work since on some courses where there are big bumps I seem to possibly be either running out of spring travel or running out of shock travel(which would require raising the front a bit or using longer springs) which causes bouncing. I'm running the Storm S1 15x9 up front in a 35mm offset but am also using a 10mm spacer. I have the extended stud kit to allow for enough threads since I'm using a spacer. Anyway sorry for the long post, just throwing some info out there..... :-)
Thanks for letting me know. I have some 15X8s I can use. Unfortunately both of my 15X9's are Miata hub spec so they're 2MM too small to go on Mini.
 

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