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Preparing for the Season. Tires? [Archive] - Toyota MR2 Message Board

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Preparing for the Season. Tires? [Archive] - Toyota MR2 Message Board Toyota MR2 Message Board > General and Racing Discussions > Auto-X Racing > Preparing for the Season. Tires? PDA

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mo01004-14-2012, 05:50 PMI started autocrossing my 2 (93 JDM 3S-GTE) last summer. I did about 6-7 events, along with a school day. I'm interested in stepping it up a notch this year, as I'm commited to making it to all the local events. In terms of preparations I want to put in new brake pads all around. OEM on the front and possibly Carbotechs on the rear.

I'm contemplating wether I should get some serious tires or not. I looked around the best options for street tires and it seems that the Toyo R1R's stand out in terms of their wet and dry performance. We do tend to get mixed weather sometimes so that's a plus. I know they wear quite a bit but she's not driven much other than in summer.

I'm currently running Bridgestones (205-50R16) in the front and Coopers (225-50R16) in the rear. I don't recall the exact types but they're definitly not extreme performance oriented. This brings me to my other issue, my current wheels are 16'' Enkeis. Unless the performance benefit of switching to 15''s is considerable, I would rather save the money of getting an extra set of wheels, unless I can find something really cheap.

So what should I do?

Stick to what I have now and don't bother with the tires
Get R1R's for my current wheels
Get R1R's with new 15'' wheels mr2tim04-15-2012, 05:52 PMWith more than 20 years of experience with tires it all come down to:

Treadware Ratings

For us serious racers traction is noted as treadware rating. The closer you get to Zero "0" the more the tires stick. Hoosier actually has a tire with this rating.

The catch, and in racing there is always a catch, is that these tires won't give you milegage on the street. They are NOT meant to, they are race tires.

You may have noticed the serious racers getting throphies bring a set of tires to race on??. Some put them on for the ride to the race like me. Then pull them off for the ride to work Monday.

So when you get all the blah, blah, blah, my tire is best crap, just ask what the treadware is. Most wanna be's don't have a clue.

Good luck this year!!

Tim
SC ToyZ RacZing
A Toyota Race Team since 1986 palos04-15-2012, 09:45 PMI'm toying with buying some DOT R compound tires and wheels locally advertised and came across a couple of Miata forum threads that may be useful: Do R Comps ever wear out before they cord? [Archive] - MX-5 Miata Forum (http://forum.miata.net/vb/archive/index.php/t-386461.html) and Tires-What are you using, what have you used? [Archive] - Miata Turbo Forum - Home to the Turbo Miata (http://www.miataturbo.net/archive/index.php?t-52196.html).

Though dated, they do address how the tires are going to be used: street/autox; street/track; autox; track.

I would reconsider using two different brake pad compounds unless you have sufficient experience with the pads to try to balance the car. Tires are going to make more of a difference than the brake pads. toyotaspeed9004-16-2012, 02:53 PMI started autocrossing my 2 (93 JDM 3S-GTE) last summer. I did about 6-7 events, along with a school day. I'm interested in stepping it up a notch this year, as I'm commited to making it to all the local events. In terms of preparations I want to put in new brake pads all around. OEM on the front and possibly Carbotechs on the rear.

I'm contemplating wether I should get some serious tires or not. I looked around the best options for street tires and it seems that the Toyo R1R's stand out in terms of their wet and dry performance. We do tend to get mixed weather sometimes so that's a plus. I know they wear quite a bit but she's not driven much other than in summer.

I'm currently running Bridgestones (205-50R16) in the front and Coopers (225-50R16) in the rear. I don't recall the exact types but they're definitly not extreme performance oriented. This brings me to my other issue, my current wheels are 16'' Enkeis. Unless the performance benefit of switching to 15''s is considerable, I would rather save the money of getting an extra set of wheels, unless I can find something really cheap.

So what should I do?

Stick to what I have now and don't bother with the tires
Get R1R's for my current wheels
Get R1R's with new 15'' wheels



Since this is in the auto-x section we're to assume that you're planning to auto-x the car?

Of course Tim didn't touch on the important aspects of auto-x - which is how your car is classed and what the club(s) you run with class cars running R comps vs. Street tires.

Being that you have a swapped engine MR2, and a 3sgte, I'm guessing you're pushing more than stock boost and as such you're immediately stuck in SSM (super street mod). This class allows just about anything for street legal use (except no stripping of the interior).

If the club you run with separates the classes you will need to decide if you want to run in the street tire or race tire class - at which point you need to see what the club rules.

Many clubs allow up to 100 treadwear in street tire which essentially throws you in the R1R club... however, some clubs (like the one we run with) are aware that the R1R is basically a heat-cycling required R comp for street use - we only allow treadwear 140 in street tire.

60 for 60 treadwear isn't necessarily the same thing. The tire companies have varying compounds and they react different in varying temperatures, conditions, etc.... A perfect example of this is that you can buy Kumho R comps that are 60 threadwear (V7##) for Auto-x or for lapping days.... obviously if you're running auto-x running the lapping day tires won't work as well as a higher treadwear auto-x tire because you won't actually reach the max stickyness in a short auto-x run.


***edit***

I can tell you that in our club - the street tire guys can be quite competitive... but the R-comp guys that run in our little city.... some of them are extremely serious and if all you have is a car with a swapped engine, minimal mods, and some sticky tires you won't stand a chance. The really serious guys will read the rule book and basically max the mods they are capable of doing within that class (or are able to 'get away' with). These are the guys running with multiple clubs who tend to win tire prizes. I live in a pretty small city - we tend to get around 60-70 competitors and there's 1 guy with a 300+whp Miata who on track days keeps up with Ariel Atoms and on auto-x days will beat the FSAE car in raw time. kbrew899104-17-2012, 02:56 PMR1Rs for the current wheels is my vote toyotaspeed9004-17-2012, 06:36 PMcheck your local club classes first. mo01004-17-2012, 10:46 PMI ran in SSM-S last year. The last S being for street tires. I think I want to stay in SSM-S this year, as most of the SSM guys are running street tires. Additionally, I don't want to suffer from the wear of a racing tire, as I'm leaning towards just getting the R1R's for my current wheels and leave them on all summer. They should last right? I have another car to daily drive, but I tend to drive the MR2 around 3-4 days a week in summer given the weather is nice.

On another note, I'm considering getting new OEM rotors (depending on how my current ones are holding up) and stainless steel lines with the pads. I'm also looking into the Prothane bushings kit available here (http://twosrus.com/catalog/product_info.php?products_id=431{1}16{43}198{44}20 0). Any one have any experience with this kit? Also what about ball joints and tie rods? I'm not sure about the condition of my current ones.

My main point here is do you guys think these upgrades or refreshments are worth spending money on? Or should I be focusing on other areas first, keep in mind the car has KYB Gymkhana Super Special shocks which I find way too stiff to be honest. toyotaspeed9004-18-2012, 12:45 PMif the R1R's are classed in your street tire then go for it. they won't last all that long....

a 60 tread R comp will usually last (from what I've told) is about 6-10 auto-x's depending on number of runs. R1R is a 100 treadwear and will probbly take slightly longer to warm up and last longer.... but it isn't a tire I would necessarily run on the street all the time.

If need be - get some extra wheels and swap them out for auto-x days.

I don't even plan on running the 140's on the street at all... just because I want them to last for auto-x days. arber021404-18-2012, 12:48 PMFind a race shop next to you and just buy a set of used slicks for about 500 $, they will last about 8-9 events. I am happy with them and they do the job great since i only participate about 9 times a year mo01004-18-2012, 01:50 PMif the R1R's are classed in your street tire then go for it. they won't last all that long....

a 60 tread R comp will usually last (from what I've told) is about 6-10 auto-x's depending on number of runs. R1R is a 100 treadwear and will probbly take slightly longer to warm up and last longer.... but it isn't a tire I would necessarily run on the street all the time.

If need be - get some extra wheels and swap them out for auto-x days.

I don't even plan on running the 140's on the street at all... just because I want them to last for auto-x days.

It says here (http://www.toyojapan.com/tires/pattern/pxr1r/#/images/tires/pattern/pxr1r_01.jpg) that they're 140 treadwear rating? toyotaspeed9004-18-2012, 02:40 PMwhoops.... I was thinking R888's.

If you're looking at 140 treadwear you might want to look into the Hankook RS3's.... same treadwear but probably significantly less expensive. Many fast cars last year were using these tires and is also why I picked them up for my size (15" wheels) once available. They were so popular last night that no vendors could get them. Powered by vBulletin® Version 4.2.5 Copyright © 2026 vBulletin Solutions Inc. All rights reserved.

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