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


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Old 02-03-2021, 11:31 AM   #29
fminicooper
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I have very bad experience with Kumho V720, delamination.
Hope that they sort it out for V730, anyway I will be away from Kumho for a long time until is clear to me thet solve their issues.
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Old 02-03-2021, 11:36 AM   #30
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Under the same logic how does a tire like the Federal RS-RR do? Seems to have decent life even though the grip isnt as good as say the re-71s/etc. Best thing about them seems to be the price, for seat time they seem like a decent option as well
IMO, Federal RS-RR has similar grip than Falken 615.
Happy with my first set.
Do not know yet how they cope with 100F day in Texas.
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Old 02-03-2021, 12:16 PM   #31
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Also, Hankook RS4 are getting difficult to find. Not a lot of sizes on Tire Rack available and backordered lots of other places. Could be the beginning of the end...

(i don't know if that's true, just speculating).

Mike, how do the VR1 S2 compare to RS4?

- Andrew
Hankook always runs low on supply in the winter, should get a new shipment around spring. Tire rack customer support might have a status on when they expect more stock. I've heard they only send one shipment of rs3/rs4 to the usa per year.
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Old 02-04-2021, 05:28 AM   #32
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Also, Hankook RS4 are getting difficult to find. Not a lot of sizes on Tire Rack available and backordered lots of other places. Could be the beginning of the end...

(i don't know if that's true, just speculating).

Mike, how do the VR1 S2 compare to RS4?

- Andrew
Significantly faster, will generate more heat but can tolerate it.

Life is long enough to be WRL competitive.

Significantly more hydroplane resistance than the RS4.
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Old 02-04-2021, 12:42 PM   #33
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I've had two sets of the RT-615K+ on my car and I'm almost due for another set. I was thinking about going with the 660 but I'm afraid tire life has dropped way off. I only track or autox sporadically which is why I went with the RT-615K+ over the RE71R. I'm also afraid the 660 will be a death trap in the rain and being in Florida this is a concern for me. I haven't read TireRack reviews of the 660 lately. Last I looked I only saw reviews that only addressed track/autox perf and not a lot of talk about daily driving. Now that they have been out for a while I need to read some more reviews.

I've been really happy with the 615's though. Tire life is good and perf hasn't dropped off a cliff to badly with age. So now I need to pick between another set of 615's or the 660's.
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Old 02-04-2021, 03:26 PM   #34
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Significantly faster, will generate more heat but can tolerate it.

Life is long enough to be WRL competitive.

Significantly more hydroplane resistance than the RS4.
RT-615K+ maintains it performance until to the end, even when they are already almost slicks.
Handles heat very good.
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Old 02-07-2021, 10:49 PM   #35
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Word is that the falkens run wide. Will 245/40 still fit? 9”wheel.
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Old 02-08-2021, 12:12 AM   #36
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Word is that the falkens run wide. Will 245/40 still fit? 9”wheel.
Yes, you could put 265's on a 9" wide wheel if you felt like it. I run 255's on 9" and it's pretty much 'square'.
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Old 02-08-2021, 08:50 AM   #37
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Have 40 offset, hoping to not have to put longer bolts and spacers, so hoping 245 won’t rub
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Old 02-08-2021, 09:45 PM   #38
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You should be fine. I also have +40mm wheels and with Yoko A052 in 255/40, I rub a little bit at full lock. But that's it.
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Old 02-11-2021, 03:59 PM   #39
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Does anyone have experience running the 245/40r17 RT660 on an 8" +35? Stock struts, trd springs with verus plates and bolts, 3.3 front 2.1 rear.

Ran 225 RS4s all last year and they've honestly probably got another track day or two in them. Lining up what I want to try next since I've planned on trying something new each season.

I really don't want to get into rolling fenders or cutting anything yet, and wasn't planning to go to coils this year unless my struts fail on me.
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Old 02-12-2021, 07:04 AM   #40
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Does anyone have experience running the 245/40r17 RT660 on an 8" +35? Stock struts, trd springs with verus plates and bolts, 3.3 front 2.1 rear.

Ran 225 RS4s all last year and they've honestly probably got another track day or two in them. Lining up what I want to try next since I've planned on trying something new each season.

I really don't want to get into rolling fenders or cutting anything yet, and wasn't planning to go to coils this year unless my struts fail on me.
245/40 on an 8" wheel is too much tire. Not recommended at all, it'll feel like mush
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Old 02-12-2021, 01:23 PM   #41
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245/40 on an 8" wheel is too much tire. Not recommended at all, it'll feel like mush
I had been wondering about this as well, and the more I thought about it the more I was doubting it. Do you think I would benefit from 235/40, or is my best bet to just stay on 225/45 until I get a set of 9” wheels?
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Old 02-12-2021, 02:59 PM   #42
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I had been wondering about this as well, and the more I thought about it the more I was doubting it. Do you think I would benefit from 235/40, or is my best bet to just stay on 225/45 until I get a set of 9” wheels?
On a 8" 234/40 is the max I would do. I tried 235/40 and 225/45 and I liked the feel of 225 better, but times were pretty similar, so its up to taste at this point. But dont do 245 on 8", it does feel like a boat, moves about a lot even after it has supposedly taken a set, specially on bumpy tracks.
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