Quick tyres question

1477 Views 21 Replies 11 Participants Last post by kykota, Sep 18, 2008

Turk

Discussion Starter · Sep 16, 2008

Ok my fronts are about 10-15% tread left. That is an overstatement. The rears are about 60%, maybe more. The cruise is coming up this sunday, I know I should have switched them earlier, but im a lazy bastard. Should I switch them now? I was thinking I would rather understeer a bit then have the rears kick out on me going around a corner, but then again I dont want to lock up and have basically 0 braking ability. Twisty roads obviously. I will be taking it easy because suspension is shagged, but im not going to bitch it obviously. New tyres are out of the question, no $$$

1 - 20 of 22 Posts

AusMX6

· #2 · Sep 16, 2008

what about stay home and not end up with a canary, or worse, a crash with no insurance due to bald tyres?

How about some cheap second hand tyres?

chief tool

· #3 · Sep 16, 2008

Are they down past the tread wear bar ?

I would just switch them around....most of the work on our cars is done at the front.

They must be a lousy brand....if they behave that badly with 10% left.

And year second hand tyres could be an option, you have to hand pick them though, some are good, some are fucked.
Milperra Tyres have heaps of second hand ones, plus there is another place at pendle hill (or used to be) but its not as good, but the tyres are cheaper.

Turk

Discussion Starter · #4 · Sep 16, 2008

They are not below the tread marker yet. I would not drive if they were. Chief, they arent the best tyres. Sumo Firenzas, like $140 or something in 235/45/17. I knew I wouldnt be doing any hard driving till summer so I didnt bother getting anything great. Im just broke as right now because I just got my firearms licence/safe club membership etc which cost more then I thought it would.

Dont get me wrong, they still grip it isnt terrible. I just cant launch as good as before and im not sure about braking because well how often do you go all out on the brakes? Normal driving is fine. I just want to know to switch them or not as it doesnt cost anything.

Looks like I will.

jmoore

· #5 · Sep 16, 2008

turk wtf is a sumo LOL

Stoof01

· #6 · Sep 16, 2008

Im in the same boat i cant get the pressures right in my fronts so they are fucked even with 42psi in them but the rear isnt bad so i was going to swap them around, atm doesnt matter what road im on i just get wheelspin through 1st gear

mhale71

· #7 · Sep 16, 2008

My car needs a good service and something to get rid of this noise it started making today, AND a tank of petrol, which im gonna die putting in (seeing as this tank only got me 300kms)

Tyres arent hard/long to get done.

check202

· #8 · Sep 16, 2008

Millpera Tyres rings a bell,
I believe i went there many years ago and they had a great range of tyres and good price. Just be carefull with 2nd hand, they can be VERY hard

As for 42psi? I thought that was a tad high, i always keep them at 34 - 36psi. Lowest i've ever found them is 12 psi but the tyres where rooted..

Stoof01

· #9 · Sep 16, 2008

check202 said:
Millpera Tyres rings a bell,
I believe i went there many years ago and they had a great range of tyres and good price. Just be carefull with 2nd hand, they can be VERY hard

As for 42psi? I thought that was a tad high, i always keep them at 34 - 36psi. Lowest i've ever found them is 12 psi but the tyres where rooted..

Yer i know 42psi i way too high but the outsides of the tyres are rooted and the center is like new, i hate my tyres they are cheap shit "Achilles" and are eco friendly DONT BUY THEM

daevilone

· #10 · Sep 16, 2008

yep switch them.
seriously rear tyres DONT wear on our cars.
after several hot dashs up hillclimb track that left molten rubber on front left (most corners are right). rear left still had new tyre tabs.

oh and oversteer is MUCH nicer than understeer. At least thats my opinion in my mx6.

heh go 2nd hand semis =D should get 10k driving out of them if you arent on the track.
not going to get 235/45 though. 225/45 easy.

as for psi - yep 42 is far too high for street driving. outside of the tyres are rooted? How hard have you been cornering? Hard cornering will rape the outside of tyres...
only other option is that they have been under inflated for a while.

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mhale71

· #11 · Sep 16, 2008

Better to have more grip at the front ei, those are the tyres that are pointing you and slowing you down.

rodhog

· #12 · Sep 16, 2008

Those Sumo's were the best for frying on 18's about 2 year ago $150 each, my friends rear end planted them all over sydney.
plus they lasted a fair bit too.

just chuck them on the back if your worried.

Turk

Discussion Starter · #13 · Sep 16, 2008

Looks like that is the plan. Hopefully I will have access to a hoist sometimes this week. My mates boss gets grumpy during the week and this saturday I have a uni exam (weird huh).

wastingtime

· #14 · Sep 16, 2008

chief tool said:
Are they down past the tread wear bar ?

I would just switch them around....most of the work on our cars is done at the front.

They must be a lousy brand....if they behave that badly with 10% left.

And year second hand tyres could be an option, you have to hand pick them though, some are good, some are [fizzle]ed.
Milperra Tyres have heaps of second hand ones, plus there is another place at pendle hill (or used to be) but its not as good, but the tyres are cheaper.

I was there on the weekend and got a good deal with rims got Bridgestone RE95 Potenza's 215/45/17 for $100 each, not bad tyres but nothing special and yet to try them in the wet, had eagle F1's which were great, but tyre place near where I live quoted $290 a tyre so neg to that.

should be fine with that little amount of tread left in dry weather although you have more power than most of us.

chief tool

· #15 · Sep 16, 2008

Stoof01 said:
Yer i know 42psi i way too high but the outsides of the tyres are rooted and the center is like new, i hate my tyres they are cheap [shizzle] "Achilles" and are eco friendly DONT BUY THEM

You might have a suspension/wheel alignment problem if your getting outside wear with 42psi...

Or you need to dial in alot of neg camber...

Are the insides of the tyres wearing too ?

Normally if its just hard cornering, just the outsides wear, but the same thing will happen if you have too much toe in
If the insides of the tyres wear only, then the car has either too much neg camber or toe out.
if you are getting both, its possible that the bushes are worn to the extent where the car swings between toe in and toe out, thanks to the play in the suspension (or steering) wear both inside and outside of the tyre.

I always use tyre wear as a measure of how well my suspension and steering is going....you can even tell by the shape of the tread blocks what the problem is to a certain extent

Stoof01

· #16 · Sep 17, 2008

2

chief tool said:
You might have a suspension/wheel alignment problem if your getting outside wear with 42psi...

Or you need to dial in alot of neg camber...

Are the insides of the tyres wearing too ?

Normally if its just hard cornering, just the outsides wear, but the same thing will happen if you have too much toe in
If the insides of the tyres wear only, then the car has either too much neg camber or toe out.
if you are getting both, its possible that the bushes are worn to the extent where the car swings between toe in and toe out, thanks to the play in the suspension (or steering) wear both inside and outside of the tyre.

I always use tyre wear as a measure of how well my suspension and steering is going....you can even tell by the shape of the tread blocks what the problem is to a certain extent

It is on the sides of the tyres that has no tred like they are under inflated, i have about 2 degrees of neg camber but i think i could be due for another wheels alinment and new bushes

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chief tool

· #17 · Sep 17, 2008

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Stoof01

· #18 · Sep 17, 2008

well there you go i didnt think hard cornering would do that much damage but i do lots of it, i cant feel anything like that in the steering but i will change the bushes just in case and i will get a wheel alignment, thanks :tup:

daevilone

· #19 · Sep 17, 2008 (Edited)

I should show you some pics of the tyres I raced on for the 2nd half of last year....

actually.
lol
im bored... back in 5 with pics

raced/daily drove. racing only like 10km a month though.
new in june, havent used them since last year.
cornering = hard on tyres!!!
LHS of pic would be inside of wheel.

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rodhog

· #20 · Sep 17, 2008

Looks like you need alot more work on your suspension setup.
It's pretty good but I've never had that evenness. It's always been harsh to the inside and even all the way out till about 5mm of the edge, then it's abusive.
but I was doing normal street tyres every 9months - with street use.

Mind you of course my suspension is rebuilt all round and custom alignment. I for go the tyre wear for max grip.

But I have never checked the Wagons settings since I put it all togeather I just set it up exactly the same specs as all south and mid european Wagons were setup.
Add max factory camber V Aus spec 0
So far it's all good on crappy kumho's which do well for plain steet tyre. which is perfect considering the use it gets or is that Abuse.

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