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03-22-2024, 01:35 PM | #551 | |
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FYI, there is a great thread that just posted on the E9X M3 Track and Road Course discussion Facebook group talking about the Kumho V730 (because of the sale right now). Highly recommend checking it out to see what others are saying about the V730. There are also a couple other posts there too about the V730 with tons of positive comments.
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kolosy1709.00 |
05-05-2024, 11:12 PM | #552 |
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Looking for a recommendation. Long time NT01 user. I'm looking for a replacement that doesn't squirm under hard braking. I've read through the pages - looks like Proxes RR or RE-71RS would be an improvement without giving up much of the NT01 good qualities. I have PS4S to drive to and from the track (and for wet lapping), so I don't need to drive on the street with the new track tires. For those that made the switch, what size do you recommend?
Wheels: Arc-8 Front: 18x10" ET25 Rear: 18x10.5" ET27 Suspension: MCS 2 way NR, 700/1000LB springs Currently running Nitto NT01 275/35R18 tires square with 5mm spacer up front on -3 degree camber and -2 degree camber on rear. Thanks for the help. |
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05-06-2024, 07:34 AM | #553 | |
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My setup is 10.5 square 295/30. For your case, you'd probably want 275/35 front and 295/30 rear. |
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BoilerUP48.00 |
05-06-2024, 10:54 AM | #554 |
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Coming from the NT01, consider the RR. They aren't as quick as the RE71RS, but will have better longevity and should be consistent for HPDE.
The ECF is a *great* HPDE tire with crazy longevity in a track tire, but in my experience they will squirm a bit in heavy braking zones until they get 15-20 sessions on them. |
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D_SheerDrivingPleasure1215.00 |
05-06-2024, 12:58 PM | #555 |
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In my experience, the RR is just a NT01 that starts with less tread. So they don't last as long and are the same speed. So from that perspective the NT01 are much better value.
The only benefit to the RR is they come in 295/30 and 315/30, vs just 275/35 and the 305/35 which is way to tall for this car. Also, I was told that the NT01 and RR are the same rubber compound when I spoke with a Toyo rep a few years back. |
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e92BMW///M3134.00 rhyary1607.50 |
05-06-2024, 01:49 PM | #556 |
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What you give up in tread depth you make up for in cost savings. Track Day Tire.com offers 295/30 toyo RR for $280 ish. Last time I checked the nittos were surprisingly expensive. And loud!
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05-06-2024, 02:59 PM | #557 |
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I've found the RE71RS to be a very user friendly tire, even for a novice like myself, albeit my experience is mostly on LimeRock's .6 mile layout that is more similar to autocross speeds (30-75 or so). They've been very durable and the pace has been there at a dozen events over 15 months. I would probably not run the 275/35 front 295/30 rear, but they offer 285/30 (what I have run, square) as well which should work in the front. I am just not a big fan of the reverse rake and the 275/35 is a bit taller. For me, the 285/30 is a bit short in the rear so it just depends what type of gearing you're looking for as well.
I am likely going to try 295/30 front with a 295/35 rear with the RE-71RS at some point, but first I am going to try out the RT660s that came on a set of rims I bought to compare against the RE-71RS.
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05-06-2024, 06:07 PM | #558 |
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Could be for you guys down in the States. Up here in Canada the NT01 was always similarly priced or slightly cheaper, in the 275 size.
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05-07-2024, 05:39 AM | #559 | |
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Overdriving was a big contributing factor, but I also found the 71RS really don't like to be below 30psi cold/35psi hot on a 3900lb sedan with solidly intermediate driver. They are awesome tires and aren't what I'd call fussy, but they aren't like an ECF or NT01 where one just laps the things...they definitely require more overall management. |
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e92BMW///M3134.00 |
05-08-2024, 09:12 AM | #560 | |
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Personally, I have found that the new RE71RS tire is faster than the outgoing RE71R on the same track and in the same conditions by about 2-3 seconds. It was definitely noticeable for me. Overall, I love the new RS tire. My current set of RE71RS (275/35/18 sq) has two wet track days (totaling 8 sessions, 175 mins on track) and one dry track day (5 sessions, 115 min on track), and I would expect one more dry track day would finish off my set of tires. Realistically, that means I could cord these tires in two track weekends driving at maximum effort (4 dry days, ~6 hours of track time). If I slowed my pace a good bit, they would last quite a bit longer. I found that the tires HOT at 38 psi seemed to work the best (3600lb car/-3F,-2.3R camber). I was also very impressed with them in the wet.
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05-08-2024, 11:50 AM | #561 |
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Trofeo RS might be the new move if you were a cup 2 / supercar 3R user.
https://www.pirelli.com/tyres/en-ww/...zero-trofeo-rs 19/20s though.. lol guess you should just buy a p car kekw.
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05-08-2024, 12:20 PM | #562 | |
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05-09-2024, 11:11 AM | #563 | |
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05-09-2024, 12:01 PM | #564 | |
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That said, I don't see a point in running staggered on these cars, and since 315 is not possible up front without flares/wider fenders, not sure if it's even worth considering Maybeee if you're supercharged? |
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05-09-2024, 02:51 PM | #566 |
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I assume that's full tread NT01, in which case those times make (more) sense. They are usually fastest on their last day, when the tread pattern is gone and you just have the 2 center grooves left (like the RR's lol).
I've run dozens of sets of NT01's and RR's, more NT01's though. Best laps on each are usually within a few tenths of eachother. |
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rhyary1607.50 |
07-06-2024, 01:34 PM | #569 | |
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What's the difference between the R's and RR's? They look the same, have thee same treadwear....Also, do these heat cycle out? I assume no, that they are like NT01s but looking to confirm.
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07-06-2024, 04:41 PM | #570 | |
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The Proxes R is quicker and more predictable than its respectable predecessor, the Proxes RR, while retaining its highly regarded consistency and durability. This DOT competition tire* has 4/32” deep tread and is designed for dry road racing and high-performance driving experiences (HPDE). With a newly developed tread compound and all-new construction, elevate your racing experience and reach the winner’s circle with Proxes R. Last season I used 2 sets of RR's. They didn't heat cycle but they corded surprisingly quick (4 track days) which is inconsistent with my experience with their NT01 sibling. The pricing never made any sense. The 295/30 RR was also significantly less expensive than the 275/35s. With a discount code, I can get a set for about a grand! |
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dvas539.00 |
07-08-2024, 07:07 AM | #571 |
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295s are required width for a couple different spec series, which is why 295 RRs (and Rs) are less expensive than other sizes.
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