07-12-2018, 09:32 PM | #1 |
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Bridgestone RE71r 235/45 17 for Auto X
Installed Potenza RE71r in 235/45 R17 size.
So far no issue with fitment/rubbing. (17x7.5 ET40) Sidewall doesn't seem like very stiff but need more time to really feel the difference. Will see how much it rolls. Compound on this tire is very soft. You can feel it when you touch the thread. As expected, it picks up everything on the road and throw back to fender liner. lol It doesn't feel too noisy for now. Although it has some weird hum at higher speed. Looking forward to next Auto X. |
07-13-2018, 07:37 AM | #2 |
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you just put yourself into the R-comp class with that tire.
I run these regularly on street/ road track. Super sticky, very soft, wont last long, not loud at all when comparing to other r comps. keep it around 34 hot, sidewalls are much stiffer than a mpss. Compare this tier with a nt01.
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07-13-2018, 08:22 AM | #3 |
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I run this size 17x8 wheels, like it ! Next will be a little more street friendly in 245/40-17 like Toyo R1R
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07-13-2018, 08:36 AM | #4 |
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07-13-2018, 09:28 AM | #5 | |
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Some organizations bump you into another class or allocate more points to your car if you run RE71. Bimmer Challenge Time Attack did this to me when I ran RE71.
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07-16-2018, 08:06 AM | #6 | |
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Some clubs may overlook it, most won't. enjoy the tires!!! I thought they were too sticky for auto x on the awd with the understeer, wanted to slide a little more out back. And watch those cones! I hit one at 90mpg 2 weeks ago, re routed my brake lines cost me $1000 to repair.
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07-18-2018, 11:52 AM | #11 |
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Cause it's a cheater tire
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07-22-2018, 10:24 PM | #12 |
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I did a Auto X this weekend and it was a blast.
Tire held up very well at respectably low pressure (compare to MPSS). I ran 36~37 in front and 30~32 rear, hot. Tire wear did not even touch the wear marker triangle. I was impressed. (I had to run 43~48 psi in front with MPSS to keep the letter readable on the sidewall. lol) I did not improve that much in terms of my time/score compare to other regular drivers but I think I was little too scared to push way further than I used to with MPSS. After I checked my videos, I don't hear much tire squeal. I should've pushed more. way more. Next time, I will lower the pressure to 32~34 in front and 28~30 in rear and push much harder. will see. Overall, I can see why this is THE tire for Auto X. Last edited by TajoMan; 07-22-2018 at 10:33 PM.. Reason: . |
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08-21-2018, 10:26 AM | #13 |
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I’m considering switching to re71r as my full time tire, but primarily for autocross. I wish I could have a dedicated set but I just don’t have the storage space.
I’m a little concerned about running the re71r full time since it’s not XL load rated and the car (228i convertible) wants XL tires. Does this matter? |
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08-21-2018, 12:39 PM | #14 | |
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https://blog.tirerack.com/blog/bens-...s-xl-stand-for Woops...hold on! The Rack shows this XL RE71R as a tire that fits your car: https://www.tirerack.com/tires/tires...Clar=M%20Sport I suggest calling them and asking them if they'll work for your car and your intended purpose.
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08-21-2018, 08:42 PM | #15 |
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[/QUOTE]
just watching that video, id put the hardest tires i have on... thats like the worst surface possible. I thought we had it bad!
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08-21-2018, 10:33 PM | #16 | |
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Thanks @dradernh! Not sure how I missed that!
I'm actually considering switching to RE71Rs up front and keeping the MPSS in the rear. I'm thinking that will give me a more neutral handling balance and I'll replace RE71Rs as they wear out from autocross and the MPSS in the rear should last substantially longer (saving $). Has anyone else done this? Should I be concerned that tire shops won't mount different tires front/rear? Quote:
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08-21-2018, 10:41 PM | #17 |
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08-28-2018, 03:39 PM | #18 | |
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08-28-2018, 03:59 PM | #19 |
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actually, going from staggered to square setup, my car feels very close to neutral. Maybe slightly understeer.
Stock staggered MPSS setup is definitely understeer. It was pretty bad. I think it will feel very neutral in 228i with square setup since it's a lot lighter in front. |
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09-04-2018, 09:54 AM | #20 |
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I did another auto x with Windycity Miata club last weekend.
I was shocked how many runs they do. 17 runs! Anyhow, tire felt great with ton grip, but they do overheat very easily. (well with 17 runs..lol) When it overheats, it does get greasy and I did not have any water to spray. Still, my time was very consistent for last 10 runs in dry. First 7 runs were in rain. In terms of pressure, I was running 32 in front and 30 rear. Tire temperature was about 165F. I felt tire lose grip a little when temperature was over 150F. Next time, I will try to spray water as it heats up. |
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09-04-2018, 01:39 PM | #21 |
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Wow! I might have stuck with autocross if that many runs had been available.
As it was, I realized that unless I went every weekend or two it was going to take me a long time to get any good it.
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10-18-2018, 09:09 AM | #22 | |
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just watching that video, id put the hardest tires i have on... thats like the worst surface possible. I thought we had it bad![/QUOTE] Don't take this wrong but picking hard tires for rough surfaces is not conducive to being fast. As choppy as Rantoul's concrete surface appears in that video, it is actually much smoother that it appears and very grippy. Fair more grippy than virtually any smooth asphalt surface, and only slightly less grippy than the best sites in the US. Many national competitors come to our local events to get seat time on this site before trekking to Lincoln for Nat's because of that reason. We are a welcoming club with a relaxed atmosphere. If you are in the area, check out an event.
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