Tyre wear diagnosis

[Steve - Toyo Tyres]

The target pressure represents the highest pressure where good grip levels are available, and this does not relate to rim widths.
Rim width is important as it does determine the size of the tyre's footprint. For example, a 205/50R15 size tyre will have a larger footprint on a 7" wide wheel compared to a 6" wheel. Where the sidewall is fitting flush with the rim flange, you should be getting the optimum tyre footprint.
There can be many reasons why the tyre is working the outside shoulder more compared to the tread centre or inside shoulder. These include not enough negative camber, the car rolling too much diagonally, spring rate too stiff, suspension binding, to name a few possibilities.
You need to contact Toyo Motor Sport tyre dealers to organise group buys. Quite a few car clubs do group buys this way.
I believe group buys are common through the Qld Toyo motor Sport tyre dealer

[lightyear]

My tyres (r888 205/15) had the same wear, I think even more than yours. It was vey noticable with the wheels of the car. About 1/4 to 1/3rd in from the outside edge there was a noticable depession. On 15x7's. Now i have 15x8's. See if it makes a difference.

[mx5racing]

About 1/4 to 1/3rd in from the outside edge there was a noticable depession.

We have been using Kumho V700's for quite some time on our NB's and now the NC's and found they had a very similar wear pattern with the depression in the tread. In the case of the Kumho it did not affect the life of the tyre nor the performance. We used to run them at 32 hot and this always worked well. We had the tyre inspected by John Mills from Kumho and he advised to run a higher pressure in the initial couple of runs (38 hot) to "settle the case". We started doing this and also run them at 34 hot and have all but eliminated this issue.

Last weekend I ran a set of Toyo's on the NC for the 1st time (i'd never dríven on them before) and was quite impressed. To me they were easy to drive with (much like the Kumho), progressive and good grip. I can see why the QLD'ers and a few of the NSW runners are so happy with them. On the cars we take to Bathurst one driver has asked for Kumho's and the other Toyo's so it will be interesting to see the outcome over the weekend.

[manga_blue]

Hot pressures should be no more than 32psi.
A little more camber would help.
You will find the tyres will wear a little faster at the quarter point compared to the tread centre or shoulders. This relates to the fact that the the tread block is smallest at this part of the tread, therefore it has more movement & a faster wear rate.
The tread pattern is quite efficient at dispersing water considering considering the groove area is small.
Regular rotations will maximize tyre life regardless of the tyre brand or pattern. Most race tracks will work one tyre much hader than the other three.

Welcome Steve.

I'll second what Steve says. This is exactly the wear pattern I had on my R888s and it's exactly the same advice I got from Stuckey Tyres. The rotations worked for me.

[rwf]

Hot pressures should be no more than 32psi.
A little more camber would help.
You will find the tyres will wear a little faster at the quarter point compared to the tread centre or shoulders. This relates to the fact that the the tread block is smallest at this part of the tread, therefore it has more movement & a faster wear rate.
The tread pattern is quite efficient at dispersing water considering considering the groove area is small.
Regular rotations will maximize tyre life regardless of the tyre brand or pattern. Most race tracks will work one tyre much hader than the other three.

Welcome steve, nice to see a rep from a tyre company acutally on the forum. Perhaps you may be able to assist us with other enquires, eg group buys?

group buy would be good

[Steve - Toyo Tyres]

For a group buy in Queensland contact the Toyo motor sport tyre dealer for Queenlsand, Tyre Tech.

[KIJIMA]

Problem is that most 'track days' that arent competion oriented dont give you the best opportunity to get yout tyres right! thus premature wear.

While you might well start the day with your tyres at 28psi cold (preferred) you miss out on the opportunity to bleed your tyres down after 3 fast laps or so, then get them to the right temps front and back, and left and right dependant on turn bias at that particular track you are at. You might do you 5 or 7 laps or whatever it may be, bring the car in then once you get out, check temps and bleed accordingly, chances are you will bleed to much as your tyres have had a chance to sit and warm up with soak, then when you go out again thinking you have the right temps, youve actually bledd them to much and you'll find yourself rolling over on the edges.

Seen this plenty of times.

With full competition you can send the car out and bring it back in during practise sessions till you get the tyres right, then for the rest of the day have fun while getting the best wear out of the them. It is pretty easy at an opentrack day to get tyre pressures wrong just because of the organisation of the day and the inability to get to your car quickly and monitor things properly.

[Boags]

Bought 205/50 R15 Semi slicks on 15x7 rims and did NOT have the scalloping problem. Perfect even wear.

Hot pressure aimed for was 31PSI (26.5 cold in our case).

Car looks gooooood with 15x7 +27 rims too...