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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 03-12-2020, 11:58 AM   #15
MaverickMonk
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Quote:
Originally Posted by Leonardo View Post
I have not run that tire. But, here is my experience with MPSS in 225 and 245 on 8" and 9" wide wheels.

I ran 245's on 8" wide wheels. The steering went all mushy, I hated it. I removed them and installed 225's. The steering was much better. I then bought 9"wide wheel and installed the 245's. The steering with 245 +9" wheels feels very similar to 8" wide wheels and 225's.
Agreed, little bit of wobble at limits of traction and a little bit of steering mush for me with 8Ē wheels and 245 PS4s
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Old 03-12-2020, 03:03 PM   #16
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Originally Posted by BlueWhelan View Post
Ahh, it’s the 40 offset and the spacers that’s are saving ya the extra clearance. How much you got with that setup?


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I have the same exact setup as jflogerzi. RCE Yellows on stock shocks/struts and Konig Dekagrams 17x8 +40 on 245/40/17 Firehawk Indy 500 and there is absolutely no need to run spacers in front. Im not sure why he's using spacers, but there is lots of clearance up front and i got -1.6 camber with camber bolts.

As far as answering this question, i didnt notice any detrimental effects from that tire size. It honestly feels really solid and planted i like the feel. I may try out a 225/45/17 after these tires wear out...
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Old 03-12-2020, 04:24 PM   #17
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Originally Posted by jflogerzi View Post
Running 245's on my 17x8 rims. No issues so far. Stock dampers and rce yellows with crash bolts up front and lca in rear. Less the 2 degrees of camber up front. Offset is 40 and I have a 3mm spacer up front and rear. Front brake clearance and rear just because poke

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Did you get RCE Yellow kit from FT86SpeedFactory? I've been thinking of getting it myself..
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Old 03-12-2020, 04:47 PM   #18
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Yes but that was a while back

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Old 03-12-2020, 05:43 PM   #19
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Generally speaking with a 17x8 wheel a 245 will be a little faster then a 225 around a track. But a 225 might “feel” better to most drivers even if technically its slower.

With that said you would also need to look at the specific tire as some brands 225s are wider then other brands 245s, or vice versa If its a specific tire that runs narrow, normal, or wide.
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Old 04-19-2020, 06:46 PM   #20
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Tests I've seen in the past from Andy Hollis have shown that matching tread width to wheel width is a good rule of thumb. The wider tire isn't effectively used on a narrow wheel as the sidewalls are "pinched".
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Old 04-20-2020, 07:42 AM   #21
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Not all tires are the same width as well. So some 225’s may run as wide as a 245. I know the PS4S and indy 500 for instance are on the narrower side and those in 245 have the same tread width as an RS4 or RSRR in 225.
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Old 04-24-2020, 11:04 AM   #22
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I run 235/40 on a 17x8 wheel for the past few seasons and feel it's a really nice middle ground. Steering feel is (generally speaking) better than a 245 and more grip than a 225.

I do not believe that the RE71R comes in that size though. But if you're not totally set on that exact tire, this could be a really good option.
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Old 08-22-2020, 10:05 PM   #23
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Quote:
Originally Posted by BlueWhelan View Post
Ahh, itís the 40 offset and the spacers thatís are saving ya the extra clearance. How much you got with that setup?


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Never saw this but because bbk

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Old 08-24-2020, 10:59 AM   #24
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My track setup is 17x9 with 255 RS4's all around. The wheels are +40 and I have 3mm spacers installed up front. I have camber plates and both top and bottom camber bolts with stock struts and springs. Maxed the plates out to give the most clearance between the fender and the springs then dialed it in at -3* camber using the bolts.

I didn't see or hear any signs of rubbing but I only got 3-4 laps in before my motor went. (stupid '13 )

My previous car I ran 255 RE71R's on an 8.5" wheel. The tires were definitely pinched and I wouldn't recommend it so I definitely wouldn't recommend a 245 on an 8" wheel either.
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