[flash]

definitely sounds like you need to stay away from that shop

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[bbranch]

So, I hate to disagree with Jim, but I just don't like the Toyo T1S tires. I decreased the pressure to 36, and with some more miles, they felt better, but still not right. I also had the alignment checked. I think what I was experiencing was tread squirm. The T1S has very aggressive sweeping ribbed tread, I could grab the tread with my thumb and finger and wiggle/bend it back and forth. I never actually lost traction in my testing, but in aggressive cornering the tire would feel like it was sliding but not actually, kind of a drift, and then a secondary bite that still felt like a slight drift. I don't drift race, but that's the best description I can think of. Last test before returning them, to make sure that I wanted to return them at the expense of more hours and hassle was to run the car to 100mph on a flat road through open farm fields (no lectures about speeding please). At that speeds the car didn't feel stable, more like a normal car floats at higher speeds, not at all like I am used to in the 968. Maybe the tread ribs trapping air under the tires??? I think these tires might be great if they were shaved, but I didn't like the way they felt new. These were 225/50/16 on front and 245/45/16 on rear. If Jim likes his, your mileage may vary at 17" - just thought I'd offer this report <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

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[EEZATOY]

Ok, revving old thread - my tires are going to need to be replaced this spring and I too am considering going to 245/45/16 and 225/50/16's. Are there any updates from those running these sizes?



Also limits the available tire choices, but I have it pretty much narrowed down to 3 possible candidates...



Lower Price

Bridgestone RE750's

Yokohama AVS ES100 (about a pound lighter (Tire Rack))



Or stick with the SO3's that I have now and like but more expensive?



Thanks Sam

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[flash]

what bbranch is talking about is the same kind of problem i see too often in oversizing - the tires wiggle - in a single turn they make you think they are grabbing better, but when you change directions abrubtly, they wiggle, energy is lost, and your handling suffers



on a street car though, this can make for a more comfortable ride



since you are considering oversizing, i presume this is a commuter and not a car that will see the track



i believe the yokes are a soft sidewall tire - oversizing will not make you happy if they are, and you do that



i have the 750s on the bimmer and like them for that car, but they would not grip well enough for me on the 968 - if the car is a commuter, you would probably be fine



i have the S0-3s on the 968, and am happy with the grip, but they tramline a bit - it may not be as bad in that size though - it was not as bad with the 255/40/17 - they have the stiffest sidewall of the bunch, and would lend themselves best to oversizing

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[Greimann]

[quote name='flash' date='Feb 8 2006, 03:17 PM'] 

  i believe the yokes are a soft sidewall tire 

[right][post="15714"]<{POST_SNAPBACK}>[/post][/right] [/quote]

This stiff vs soft has come up before. Can you explain where to find this information from the markings on the sidewall, tire rack tech article or other authoritative source? How is a consumer to know?

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[EEZATOY]

Ok, this shouldn't be oversizing



225/50/16 fit rims 6-8" optimum 7"

245/45/16 fit rims 7.5-9" optimum 8"



Sorry - yes stock 16's I believe they are 7 and 8 respectfully

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[Mark]

For the stock 16's you can pick up an extra 1/2" contact patch running the S2000 S02s. The 750's have been better for me then the AVS ES100's. From what I've run on the 16's in warm/hot weather S2000 S02> 968 SO2> 750s> ES100. It's good to get free mounting and balancing so you can try different things. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

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[flash]

dave - it isn't available in any data sheet i can find - i have had to query each manufacturer one by one, as well as tire installers - certainly not the preferable method - not sure why they don't give out that information - it makes such a huge difference - that's why i only have info on a few models though



eezatoy - by oversizing, i am not referring to recommended rim widths - certainly the tire will fit - but, it is oversize from the stock application - for maximum handling, you want the tire stretched more on the rim, thereby reducing sidewall flex - by putting a bigger tire on there, you end up with more sidewall flex - this will help cornering, but hurt handling - it will also give a smoother ride though - consideration of the construction of the tire is critical here if considering performance



dropping the profile like you're talking about helps a lot - the car wallows in the front enough with the stock sizes, so you want to be careful here - i've run a lot of 225/50s over the years, and they tend to work best on an 8" rim if you are looking for best handling, but the ride quality is best on a 7



it's all about what you want out of the car

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[EEZATOY]

Ok, I get that - profile is a factor of tire width - so by increasing to 225 and lowering to 50 I still end up with the essentially the same amount of sidewall as the 205/55 but a lager contact patch which would then generate more force on the sidewall. Correct?



So my other choice would be a 225/45/16 - reduces diameter by aprox. 1" (25 to 24, but within reason of the rear change of 25 to 24.6) and optimum rim width of rim is 7.5" not the 7" that I have. Always a compromise...



Also reduces my choice of available tires

The SO3's

and Yok AVS ES100's (half the price of the SO3's)



Sam

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[flash]

well, what are you going to do with the car? that is probably a better way to decide

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[EEZATOY]

Its my daily driver - with some sprited runs and maybe a DE thrown in...

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[flash]

then i'd say go with the S0-3s in the 225/50 and 245/45 setup - that's probably the best compromise - they have the stiffest shoulder and sidewall, are the right OD, and best grip - the ride should be good too



they can be a bit noisy though - the 750s are quieter, but don't grip nearly as well wet or dry - i think the yokes are too soft in that profile

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[mitch968]

I'm about to purchase new tires for my stock 16 inch rims and am considering the 225/50 245/45 combo. I'm looking at the newer Toyo T1-R, as I've heard that the T1-S is being discontinued. I've seen some reviewers state that the T1-R has a stiffer sidewall than the T1-S. Does anyone here have any experience with the T1-R?



bbranch, how many break in miles did you give the T1-S? I've seen some reviewers state that they take a couple hundred miles to lose the loose feeling you describe.

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[flash]

send me an email - i'll see if i can dig up the number on my toyo guy and get it to you - he had a lot of info like that

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[Nenehubert]

ok..... what's this about tires!?!?!?!?!!



I'm wanting a new set of tires before i leave next friday. I have the 17 inch cup-2 wheels ( edit - cup wheels.. before i'm flamed). The sizes right now are ok 255/40 S-03's in the back and 225/45 S-01's in the front, i'll get the numbers later - i know they are bridgestone. Should i go for the same size.. or plus size? What tires do you all recommend? Yes, i am going to track this car, and i haven't driven it much since i bought it.



Oh yea, still don't have the key to unlock the wheel locks. Never got it from jeff.. perhaps i should call him. Will this be a problem?

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[Nenehubert]

..... nobody likes tires anymore? Need to order/purchase some. What's the stock tyre for the 17 cup's?? i'll just plus size them from there. Should i get the S-03s?

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[Greimann]

I think you should stay with the size you have. The brand and model is really up to your budget. The SO3 is a great tire, but pricey. The Yoko AVS ES 100 is a decent tire and reasonably priced. There are tons of other choices.

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[mitch968]

Not sure about 17's, but I've decided to go with the T1R's in the 225/50 245/45 sizes on stock 16 inch rims. I spoke with Flash's contact at Toyo, and he thought that those sizes would work very well on 7 and 8 inch rims respectively. My tires should be at the installer by tomorrow or Monday, so I'll give some feedback after breaking them in.

Oh yea, still don't have the key to unlock the wheel locks.

My car had the old style key locks, but the key was missing when I bought it. Had to have them broken off. I think there's a way to drill them out, but I've never done it. I now have the new style lug locks on there, but not sure why, since I can't imagine someone bothering to steal old stock wheels in average condition.

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[Nenehubert]

since the stock size on the 17 inch wheels is 225/45 and 255/40 what would be the advantages, if any, of going with say 235/40s in the front and 265/40s in the back? Would this be possible? I think i'm going to stay with the S0-3s.



It's one of those sleepless nights again.. damn.

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[cosimo]

I have the Toyo Proxie T1s on 17" Fikse FM10s, 245 front & 265 rear. They have been great for me. Daily driver and some DE events. Keep the pressure at 36 psi all around. Very good in rain, though I try to avoid that as much as possible. I had 225/245 on my 16" previously and that worked as well.

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