12-04-2016, 12:04 AM | #23 |
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By big track I mean not autox. I recall a 2700lb fiesta st chewing a set up after 4 20 min sessions. Prob lack of camber in that situation as well being on stock suspension.
I've never run a 200 tread wear before only nt01, r1's and v710s. |
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12-04-2016, 12:13 PM | #24 |
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I have run the Nt01's and the V710's also. These re71r's are definitely soft and will benefit from more negative camber front AND rear for that matter when on the track. Amazingly enough, my gut feel tells me they feel faster than the Nt01's but ultimately will have less heat tolerance and durability on the track than the Nt01. The streetability is much better than the Nt01's though, so therein lies the compromise. When my Nt01's were new with full tread, people thought I had a supercharger on my car because the tires made so much noise, hilarious! I tend to spend some time (days, sometimes weeks) on the street with my track setup, in between events, so I like to find a tire that can do both.
Guess we'll see if I can make these work without camber plates like the R-s3's did on my E92 M3, going back and forth between track and street, rotating religiously all the way. I've included a couple of pics of the front and rear (in that order). Two 20 min sessions on the tires with maybe couple hundred street miles. You can see the outside tire wear is visible, but if you look close there is plenty of tread depth on the edges still available on the front. The rear shows the same pattern but with less wear than the fronts. Some street miles will even out the edge wear and clear my OCD of the imbalance too. A flip on the rims will not be out of the question in the future if necessary. Time to rotate. |
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12-04-2016, 01:17 PM | #25 |
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Thanks so much for taking the time to post the pics. Def looks like it could use some camber but they look better than I thought they would.
My brother is trying to steer me towards the star specs for better durability. Since I mostly track and only do a couple autox's a year it might make sense. I just wish Nitto made some nt01's that would fit without any mods. Those tires seem to last forever! |
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12-07-2016, 08:45 AM | #27 | |
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I have a set of Maxxis Victra R tires. I have been able to drive them to and from track and autocross events and as you , keep them on between events only going to the stock tires for long travel or for car events and shows. The maxxis also make some odd sounds (like a whooshing sound more than a whine ) on track. A friend of mine found he was 2-3 seconds quicker on track with them than the NT-01 so the maxxxis are quite slow. The maxxis wear like iron. I can't kill them ! The Re71R is the top autocross tire out today. It handily beats the hankook RS-3 on track and like that tire it is perfectly suited for driving to the track and on track all day and then home. Your assessment on re71r vs an all out R tire like the NT-01Or Victra is spot on! I'm going to probably switch to re-71r for next season for my autocross tires to replace the maxxis |
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03-09-2017, 11:47 AM | #28 |
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Here is a video lap with the C4 TRMotorsports 18X9.5 square setup, Re71r, SRF brake fluid, and EBC yellowstuff brake pads at Arizona Motorsports Park that I forgot to post a while back: https://www.youtube.com/watch?v=5Sqdknd5NWc
Love this setup and the integrated track timer! Last edited by MINI135i; 03-09-2017 at 05:27 PM.. |
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03-09-2017, 04:58 PM | #30 |
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I think the 18x9.5, 265 square setup has a small advantage due to the increased front end bite and the smaller diameter tires which provide a slight gearing advantage.
As implied in your post, the Re71r's themselves, are the greatest speed adder from the stock tire set up, so either wheels, staggered or square, are going to massively benefit from the Re71r switch! Even though we are just talking which is faster here, I cannot help but mention the HUGE benefit of rotation with the square setup as I like to get the most out the the expensive track tires I seem to constantly buy year after year! Last edited by MINI135i; 03-09-2017 at 05:21 PM.. |
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03-11-2017, 08:19 AM | #31 | |
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05-12-2017, 12:33 PM | #32 |
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Now seven 20 min sessions on the Re71r with completely stock suspension. Rotated after every 2-3 sessions.
Kinda what I expected, although I am a little surprised about how much the rear contributes to the edge wear also, more than I expected. Again, at some point I will probably flip these on the rim. Going to push them a bit further though first. |
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01-15-2018, 06:20 PM | #33 | |
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01-16-2018, 07:32 PM | #34 | |
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01-17-2018, 09:09 AM | #35 |
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01-17-2018, 01:21 PM | #36 |
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Attached photo taken after the sixth 20 minute session on day 2. The tires were completely shot after the weekend - 3 days. It was a hot weekend and I was pushing pretty hard too. Should also note this was my first set of RE-71s, I was trying to get the temps right, etc. as well.
One thing I was told to try with the next set of RE-71Rs was to take it easy the first session out with them. 10-15 minutes to get them warmed up but not hot. Come in and let the tires cool completely. That definitely made a difference! Much better wear all-around, and on the edges too (w/ -2.8 camber). After 1000 street miles and 4 track days the tires are still in very good condition! The outside temps were a good bit cooler as well. |
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01-18-2018, 08:51 PM | #37 |
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Good advice, sounds like the classic "1st heat cycle" then let cool, that we used to pay Tire Rack to do on all of our R-compound before they even shipped to the door.
Yeah, from what I have seen with other drivers, the Re71r's can die quicker when really pushed to the extreme. Definitely, mileage varies depending on driving style. One consistent thing: these are FAST tires, really like them for the track! I got 10 twenty minute sessions before I flipped them on the rim. Hoping to get 20 total twenty minute sessions by the end of their life, we'll see! That said, although I have been doing this for a lot of years and I'm am relatively quick on the track, I am definitely easier on tires and brakes then most of my fellow trackers. I have kind of learned to tend to my tires and brakes when needed during the session, makes a lot of difference in longevity as you mentioned. |
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02-18-2018, 10:32 PM | #38 | |
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02-19-2018, 08:11 AM | #39 | |
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I don’t even run a 275 on a 9.5” wheel. 265 is nice and square, turn in and sidewall flex is better with 265 on a 9.5, and 275 tread width wouldn’t be that much more than 265 on a 9.5 bc it should be on a 10” wheel. |
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08-23-2018, 02:57 AM | #40 |
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Hi,
Can you tell me which SCHROTH QUICKFIT you selected to fit the M2? On their website it only has the E90 or E92 as options when you try and select a BMW model. Have you been happy with the harness? Cheers, Alex |
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08-24-2018, 06:48 AM | #41 | |
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This is a great upgrade for the track....it does not interfere with the stock belts and it holds you in much better on track. My friend used these with his Hans and totaled his car with a drivers side impact and the unit prevented him from getting injured. |
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08-24-2018, 07:32 AM | #42 | |
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Did your friend have aftermarket seats? |
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08-24-2018, 01:39 PM | #43 | |
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08-24-2018, 03:28 PM | #44 |
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No issues whatsoever. 265/35/18 Re71r should be fine as long as your offset is near the +33 range. The Apex 18x9.5 wheel is offered in a +35, so coupled with the 265/35/18 Re71r, that should work just fine with a stock set up. Apex is a good wheel, have run many sets of them other cars. I think Apex plays it a little safe and recommends a 255/35/18 on the 18x9.5 +35 for the M2 to make sure every brand and compound of tire will fit.
The Re71r's are only directional and can be removed from the rim and flipped so the worn outer edge is moved to the inside. Re71r's do not designate an "outside" facing sidewall because of the symmetrical tread and compound pattern. You have to flip at least two tires at a time so they can be moved to the other side of the car to remain directional. If one has been rotating on a normal schedule, flipping all four tires on the rims is the way to go, as they will all need it. This is the way I do it. (And then there is the case that many of us racers know when trying to maximize track tire life and the above mentioned cannot be achieved. Running a tire non-directionally does not blow up the car. It usually just decreases wet performance because the tread pattern is reversed and can't evacuate water as well.) Good luck! |
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