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[TheBoy]

The F1s on the front of the Bullet have gained some worrying splits on the inner edge sidewall (both tyres).

Based on this, and the appalling life I got off TBE's ones does mean I cannot personally endorse these tyres any more.

thats not very hard to do.. I can do it within 5-10 minutes on a bad road TC off full throttle on low gears and sideways until you burn/burst them out 


imo stop testing the limits of tyres and the car..

So it shows the tyre is unsuitable for the car.

[chrisgixer]

The F1s on the front of the Bullet have gained some worrying splits on the inner edge sidewall (both tyres).

Based on this, and the appalling life I got off TBE's ones does mean I cannot personally endorse these tyres any more.

Date code?

....?

[TheBoy]

The F1s on the front of the Bullet have gained some worrying splits on the inner edge sidewall (both tyres).

Based on this, and the appalling life I got off TBE's ones does mean I cannot personally endorse these tyres any more.

Date code?

....?

I need to whip them off before using it, so can check then.  I think they were fitted this year, prob Feb time, so would imagine date code back end of 2013.

[Field Marshal Dr. Opti]

The F1s on the front of the Bullet have gained some worrying splits on the inner edge sidewall (both tyres).

Based on this, and the appalling life I got off TBE's ones does mean I cannot personally endorse these tyres any more.

Date code?

....?

I need to whip them off before using it, so can check then.  I think they were fitted this year, prob Feb time, so would imagine date code back end of 2013.

Just how safe are old tyres?

The family Corsa is still sitting on it's original Pirelli P6000 rears.


September 2003......25,000 miles.


Safe or accident waiting to happen?

[chrisgixer]

Depends how hard you push them.



....clearly not very hard.

[Field Marshal Dr. Opti]

Depends how hard you push them.



....clearly not very hard.

No problem at recent MOT.

75 BHP and FWD means the rears have a relatively easy time however hard you push them.

[05omegav6]

The F1s on the front of the Bullet have gained some worrying splits on the inner edge sidewall (both tyres).

Based on this, and the appalling life I got off TBE's ones does mean I cannot personally endorse these tyres any more.

What pressures do you run

32psi, as per vehicle manufacturers recommendations

That be why they're fooked... Given the speeds you drive it at, they should be at fully loaded pressure. In fact I am surprised Chrisgixer hasn't suffered similar damage, for the same reason, although I think you might actually work the car harder...

Effectively you have overloaded the tyres by running underinflated. Were they extra load or standard 93s?

[chrisgixer]

Other way round Al. A tyre works at an optimum temp. Which equates to a given psi once hot.

So of working the tyre hard, you generate a good deal more heat and the pressure goes up. If the pressure goes up too high, the grip tails off.

Ask any track addict.

....although, it depends on the tyre and how hard the driver pushes to achieve x amount of heat and therefor pressure.

If adding load to the car however then yes wack the pressure up.

[chrisgixer]

Also assumes tyres are of correct load rating to start with. Imo omega minimum load rating for tyres is too low.


....for.....enthusiastic driving anyway.

[05omegav6]

The point being... to dismiss an otherwise perfectly reasonable tyre brand because it has been abused and not stood upto that abuse is somewhat churlish...

[chrisgixer]

Needs further nvestigation, but I doubt TB is doing anything different than on any other tyre he's had.

[cem_devecioglu]

between all these searches for reason I highly doubt daily use performance tyres are designed for track type use..


track tyres are (for dry) have a harder compound and will grip when its hot.. but will be very noisy when cold..


when buying those tyres I compare both dunlops and f1s.. dunlops were harder which I didnt prefer..


but Al has right. for performance use the pressures must be higher for the tyre to keep its shape on fast cornering , fast braking etc regardless of weight.. 32 psi is too low for omegs for high speed use




also I discovered that when accelerating I need higher pressures for clit which now I use 35 psi otherwise it cant grip when turbo kicks in

[05omegav6]

Needs further nvestigation, but I doubt TB is doing anything different than on any other tyre he's had.

At the very least the load rating in those particular tyres is off

[chrisgixer]

clit is front wheel drive cem. Omega is rear wheel drive.


The rear tyres have a lower pressure on front wheel drive to replace the amount or "work" missing from the drive of the engine.

Omega has more balanced psi all round due to weight of the engine and steering at the front, versus drive at the rear.

If asking front wheels to drive and steer at the same pressure they will over heat. Plus an increase in 3 or 4 psi won't affect the structure.




.....however, if running lower than desired pressure, that achieves the desired temp, then it will over heat.


I wonder if pressures have gone unchecked for some time, and gone under inflated. Or the load rating is too low for the car. ( hasty edit,  or too low for the car  when driven by TB...?)

[cem_devecioglu]

clit is front wheel drive cem. Omega is rear wheel drive.


The rear tyres have a lower pressure on front wheel drive to replace the amount or "work" missing from the drive of the engine.

Omega has more balanced psi all round due to weight of the engine and steering at the front, versus drive at the rear.

If asking front wheels to drive and steer at the same pressure they will over heat. Plus an increase in 3 or 4 psi won't affect the structure.




.....however, if running lower than desired pressure, that achieves the desired temp, then it will over heat.


I wonder if pressures have gone unchecked for some time, and gone under inflated. Or the load rating is too low for the car. ( hasty edit,  or too low for the car  when driven by TB...?)

irrelevant with the subject..


if you want grip you must have pressure to keep shape..  deforming shape tyre means less surface..  and its critical in cornering