Performance Tire choices for OEM 15s - Page 3 - MR2 Owners Club Message Board
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post #41 of 57 (permalink) Old July 29th, 2018, 23:59
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If you mean the Kumho tires, I'm not surprised. I find they give almost zero warning before they break away.

At the same time, are your tires broken in? Some factory tires have more slippery solvents on the tread when they're fresh and it might take a week or so for it to rub off.
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post #42 of 57 (permalink) Old July 30th, 2018, 20:14
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If you mean the Kumho tires, I'm not surprised. I find they give almost zero warning before they break away.

At the same time, are your tires broken in? Some factory tires have more slippery solvents on the tread when they're fresh and it might take a week or so for it to rub off.
Yep, the Kumho V720s. My MR2 is a weekend driver, so not a lot of miles on them yet, but at the time they might not have had more than 10-15 miles on them. Shouldn't be too hard to revisit the same area and condition and see if they grip any better since then.
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post #43 of 57 (permalink) Old July 31st, 2018, 22:35 Thread Starter
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Your set has 195s up front, no? Weird thing is I actually experienced my first bit of snap oversteer with these tires, but I was pushing it around a corner and did let off the throttle, so not totally unexpected. But I do think they have now exposed that their limits will come far sooner than the 17" SSRs I had with S.Drive tires.

I wouldn't mind going for a drive in the rain to see how they do, but the recent storms we've been having have also had a chance of hail, and I definitely do not want to get caught in that stuff.

Yup, I have 195/50/r15 out front. Curious to see what you find when you get some miles on the Kumhos.

So I got to test out the ventus rs4s at a track day this weekend. The tires definitely need to be warmed up. There were a few scary moments when I went back on after a break and didn't realize how important that was. The tires are pretty grippy. Stiff sidewalls and rigid structure made for a good initial grip feel. What was surprising was that once you get past the initial limit, they do dig in and give you a lot of grip. I have stock suspension so I found that the tires were better than the suspension. I can't tell if occasional patchy result was due to the tires. Also, in terms of front to back offset, I think 205s out front would have been amazing. But they were not offered in that size. It was very hard to get the car to oversteer which sucked. Also, my car isn't producing a lot of power at the moment so I was not able to put enough stress on the rear tires. The stock turbo gives very progressive power. What I had read about and was happy to see was the minimal amount of tread wear. at the end. I emptied a half tank doing laps and lost only a little bit of tread. These tires will last a long time. If I had to buy these tires again, I'd likely ignore the need for an off-set and get the same 225/50/r15s front and back.
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post #44 of 57 (permalink) Old September 27th, 2018, 00:26
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Pics from this morning's wash...
Nice car. Sounds like this is the size to go to now..for matching sets.
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post #45 of 57 (permalink) Old October 5th, 2018, 18:20
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Every once in a while I take a good hard look at this problem. Tire manufacturers are doing a good job just managing to skirt around the size combos we need. Mostly the 225/50 rear is the problem.

The 205/50 front and 225/45 rear seems like the best compromise because you can get a handful of 200TW summer extreme performance tires in those sizes. Having run these and similar sizes before, I really prefer the taller 225/50 rear for a primarily street-driven car.

I did once find the Toyo T1-R in the right sizes on some UK tyre () web sites, and wondered if any of them were willing to ship to the US and how much that might cost... then again, the T1-R is quite an old tire and I'm sure it's easily surpassed these days.

On my 93T I currently have S.Drives up front and ES100s on the rear in OEM sizes. It isn't ideal. It's correct to question mixing and matching tires as they'll differ in grip, aquaplaning resistance, and warmup characteristics, delivering inconsistent handling and feel. In my case, the ES100s have very soft sidewalls and don't give the most secure feeling to the back of the car.

For a while on my 93NA I ran 195/50-15 fronts and 205/50-15 rears for daily use. Again not ideal because they're small and shorten the gearing, but it retained a little bit of width stagger and I could get matched tires that way.

Just to note for anyone considering the RE71R, be prepared that they have very stiff sidewalls and you'll feel everything. Outstanding performance tire, though. Grip and feedback for days.

Some Porsche 911s used a 225/50-15 up front when new. I wonder what owners of those cars do for tires.

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post #46 of 57 (permalink) Old October 6th, 2018, 03:59
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Some Porsche 911s used a 225/50-15 up front when new. I wonder what owners of those cars do for tires.
Pirelli P-Zeros still come in that size. $320 each!

I have RE71 Rs and love them so far (two events and about 8k road miles). Though mine are on 16" / 17" double staggered aftermarket rims. Bryan is right about the sidewalls. I had RS4s before, and these are noticeably stiffer in that respect.
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post #47 of 57 (permalink) Old October 6th, 2018, 19:09
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Hi Bryan

Is the 225/45 vs 225/50 a huge difference in diameter?

My 94 mr2 has new rear tires and 10 year old front tires. Thus curious what to do on the stock wheels

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Originally Posted by BryanH View Post

The 205/50 front and 225/45 rear seems like the best compromise because you can get a handful of 200TW summer extreme performance tires in those sizes. Having run these and similar sizes before, I really prefer the taller 225/50 rear for a primarily street-driven car.

.
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post #48 of 57 (permalink) Old October 6th, 2018, 21:26
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Here's a handy site to get real numbers (and an approximate visual) on different tire sizes. https://www.tacomaworld.com/tirecalc...0r15-225-45r15

The 225/45 works just fine, I just think we're already turning plenty of RPM on the highway and I'd prefer it not to be even higher. Plus if one has a low mileage car they'll be artificially increasing the odometer reading by, in this case, 3.7% for as long as they're on that size.

As an aside, width is often mis-represented among high performance street tires like the RE71R and similar. Often they are wider than their width number suggests. I don't know if the same then applies to sidewall height and thus overall diameter.

Jim, do the P-Zero$ come in a front size appropriate for us? If so are they a decent tire by today's standards or are they relics still under production for vintage Porsche authenticity?

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post #49 of 57 (permalink) Old October 7th, 2018, 02:08
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Thank you kindly

Yeah my 94 is very low miles. It has kumho ecsta on rear that are new

Front is bf Goodrich - full tread - but 10 years old. I don’t know at what year tires are unsafe do drive

Thus my options are:
Get a pair of new kumho on front

Or more ideally: get 4 performance tires in the closest to OEM sizes without changing mileage/gearing etc

Appreciate the help

Lot has changed in the 10 years I have been out of the mr2 game
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post #50 of 57 (permalink) Old October 7th, 2018, 10:06
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Originally Posted by loanshark View Post
Thank you kindly

Yeah my 94 is very low miles. It has kumho ecsta on rear that are new

Front is bf Goodrich - full tread - but 10 years old. I donít know at what year tires are unsafe do drive

Thus my options are:
Get a pair of new kumho on front

Or more ideally: get 4 performance tires in the closest to OEM sizes without changing mileage/gearing etc

Appreciate the help

Lot has changed in the 10 years I have been out of the mr2 game
Kumho no longer makes the Ecsta AST in 205/50/15, so you won't be able to build a matching set. They do have other tire models in that size, though, so you could have Kumho's all around if that's what you want. The other option is to go with a 195/205 stagger. There are a couple of tire brands to choose from, including Kumho.
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post #51 of 57 (permalink) Old October 7th, 2018, 10:36
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Quote:
Originally Posted by loanshark View Post
Thank you kindly

Yeah my 94 is very low miles. It has kumho ecsta on rear that are new

Front is bf Goodrich - full tread - but 10 years old. I don’t know at what year tires are unsafe do drive

Thus my options are:
Get a pair of new kumho on front

Or more ideally: get 4 performance tires in the closest to OEM sizes without changing mileage/gearing etc

Appreciate the help

Lot has changed in the 10 years I have been out of the mr2 game
Kumho no longer makes the Ecsta AST in 205/50/15, so you won't be able to build a matching set. They do have other tire models in that size, though, so you could have Kumho's all around if that's what you want. The other option is to go with a 195/205 stagger. There are a couple of tire brands to choose from, including Kumho.
Thank you

I hadn’t heard of the 195/205 stagger. I will do some searching

I am used to daily on R888 and yokoa048, thus would like some more grip 🙂
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post #52 of 57 (permalink) Old October 7th, 2018, 11:10
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Has anyone run 225/50/15 on all 4 corners on stock rims. I am leaning that direction on my new to me low mile 95 turbo. Looking at the tire size comparison it will gain half inch height. Every choice is a comprise this seems lesser of all evils
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post #53 of 57 (permalink) Old October 7th, 2018, 20:15
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Has anyone run 225/50/15 on all 4 corners on stock rims. I am leaning that direction on my new to me low mile 95 turbo. Looking at the tire size comparison it will gain half inch height. Every choice is a comprise this seems lesser of all evils
if the front wheels can support 225, that may be a great option
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post #54 of 57 (permalink) Old October 8th, 2018, 10:07
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if the front wheels can support 225, that may be a great option
My local Discount tire is saying that a 225-50-15 will mount on the stock front 15x6 rim and it's within range. This is for the Kuhmo Ecsta AST

I looked at the other options, they (the tire store) took issue with the Hankook Ventus R-S4 225/45-15 Tires as they are 87w rated tire and the Mr2 specifies 91w, plus I didn't want the smaller diameter.

I haven't done anything yet. The previous owner is running Borbet wheels 15 front and 16 rear to overcome the issue, I'm just interested in returning the stock wheels back onto the car.
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post #55 of 57 (permalink) Old October 8th, 2018, 10:56
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My local Discount tire is saying that a 225-50-15 will mount on the stock front 15x6 rim and it's within range. This is for the Kuhmo Ecsta AST

I looked at the other options, they (the tire store) took issue with the Hankook Ventus R-S4 225/45-15 Tires as they are 87w rated tire and the Mr2 specifies 91w, plus I didn't want the smaller diameter.

I haven't done anything yet. The previous owner is running Borbet wheels 15 front and 16 rear to overcome the issue, I'm just interested in returning the stock wheels back onto the car.
That makes sense. My 94 has the OEM 15 inch wheels, with new Ecsta AST rear, and 10 year old (albeit full tread) BF goodrich 195/55 front.
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post #56 of 57 (permalink) Old May 18th, 2019, 11:43
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Just to update everyone, we have a new option for OEM 15" sizes!

Yokohama has updated the A052 and released more sizes. Among them are the elusive 225/50-15 as well as both 195/55-15 and 205/50-15 for the front.

These are a maximum performance summer tire with 200tw. No experience yet in the wet but in the dry they stick very, very well. It should be a very safe tire for MR2 owners with its short stopping distances and prodigious grip for accident avoidance.

I chose the 205/50-15 front for that little bit of extra grip in autocross. These tires run wide and you can see in the photos below how they are pinched onto the stock-sized wheels. A 195/55-15 up front might be more appropriate for a street-only car.

https://photos.app.goo.gl/1hHaSMLs35e1MruJ9

https://photos.app.goo.gl/95DpTJ2EuQzg4k2e8

https://photos.app.goo.gl/77tpFnZzTS26ZSdk6
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post #57 of 57 (permalink) Old October 2nd, 2019, 14:40
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Any 15" Tire Recommendations for Everyday Driving?

Hey everyone, getting back into the MR2 game after some time off. Managed to hang onto my MR2 in the garage some, but not a lot of TLC over the years until lately. It's currently on some tired 10+ year old Toyo Proxes, and I'd like to get a new set as one of them seems problematic with a slow leak when sitting. Are there any tire size recommendations for the OEM wheels that aren't track or 'summer only' type of tires? I'm in Oregon, and don't play on driving in it in bad weather as it's a second car, but would like something more versatile. Thanks!
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