Tyres Scrubbing

[flashpixx]

Kumho Ecsta KU31 205 45 16. Just had H&R 35mm coils and Bilstein B8 dampers installed. Front left tyre from negotiating a roundabout at too high a speed?? Front right has no scrubbing.

Is this a common complaint with these Kumhos?

[HaydEn]

Tyres Scrubbing

Yeah the ku31 goes a bit like that with hard cornering. If you dial in a touch more negative camber you can offset this wear.

[Stuwey]

Wheel alignment? Pressure? Looks normal for some "spirited" driving, maybe a little understeer, hence you're scuffing the shoulder off??

[flashpixx]

Wheel alignment? Pressure? Looks normal for some "spirited" driving, maybe a little understeer, hence you're scuffing the shoulder off??

wheel alignment is good, 36 PSI (now up to 38 ) spirited driving yes, a little understeer yes probably...

[noone]

They do tend to eat the outside edge quickly when driving hard.

[flashpixx]

They do tend to eat the outside edge quickly when driving hard.

time for a tyre rotation and some revised driving habits

[HaydEn]

Tyres Scrubbing

time for a tyre rotation and some revised driving habits

It's just the tyre. The tread rolls over onto the shoulder somewhat. More so then a regular tyre.

2 degrees negative front.

1 degree negative on the rear.

[seangti]

Nothing to worry about, normal wear if you're driving it hard. I have the same set up, tyres and suspension. I've got chunks of tyre missing from the outer tread blocks and scalloped, it happens. Though my wear is from the track, not street. If I think of it tomorrow I can add a pic, that'll put your mind to rest

[flashpixx]

Nothing to worry about, normal wear if you're driving it hard. I have the same set up, tyres and suspension. I've got chunks of tyre missing from the outer tread blocks and scalloped, it happens. Though my wear is from the track, not street. If I think of it tomorrow I can add a pic, that'll put your mind to rest

Thanks

[seangti]

Front Left


Rear left


Rear left


Because the circuits up here are all right handers, the left side cops a flogging. The rear left tyre started life on the front left so has sustained more damage from doing sprints. With the "happy laps" we do, whilst we spend longer on the track, it doesn't allow for consecutive hard laps so the tyres don't fall apart. I've done about 20,000kms on these and should get at least another 5k out of em. and have been doing happy laps monthly, so probably ~10 of them and perhaps 2-3 sprints.

[noone]

My preference was to change to RS-R's, so much more grip (and still under $200 a piece).

I don't have to worry about traction as much any more.

Still have the Kuhmo's on the rear, I have not had any issues with any tyres on the rear tho.

[flashpixx]

My preference was to change to RS-R's, so much more grip (and still under $200 a piece).

I don't have to worry about traction as much any more.

Still have the Kuhmo's on the rear, I have not had any issues with any tyres on the rear tho.

so the Rs-R's are a semi slick tyre? What do they wear like and what is the wet grip like?

Federal 595RS-R | Ultra High Performance Street & Track Tyre

[noone]

Ja, thats them.

Wear will be quick (I'm thinking 20,000 kms, but my toy only has 55k kms for an 06, so not a big deal.

Wet, better than the Ku31's. Dry, a lot better than the Ku31's. They are also more comfortable, I'm not going to try and explain why, but I think it has something to do with the soft compound and stiffer sidewalls working better with stiff suspension and bad roads.

[Diesel_vert]

so the Rs-R's are a semi slick tyre?

The Federal 595RS-R is more like a track-biased road tyre (as opposed to a road-legal track tyre), similar to the Bridgestone Potenza RE-11, Kumho Ecsta XS (KU36), Yokohama Advan AD08, and the like.

If you want something for motorsport, a road-legal track tyre like the Federal FZ-201 or FZ-202 would be more suitable.

What do they wear like and what is the wet grip like?

Wet grip isn't as big an issue as you might expect.

EDIT: In fact, as long as the tyre can evacuate water fast enough and have decent temperature, you'll probably generate more G in the corners on moist roads.

The real problem with track or track-biased tyres is standing water (aquaplaning) compared to regular road tyres, which is in part due to their reduced tread depth (when new) and tread pattern (lack of wide grooves for water drainage) amongst other reasons.

Naturally, you'd have to be extra cautious on the road, reduce speed on highways, avoid puddles, and so on - especially after a heavy downpour.

But long as you can manage the aquaplaning, it's fun and just adds to the drama.

Though sometimes it can get on your nerves if you're not in the mood and just want to get home quickly after work.