Cocked the handling up - any ideas?
Discussion
Yep, 91 load rating all round.
Not checked the nuts, will do now though.
Will definitely rotate them round too.
Fortunately there's a by-pass near to home that doubles up nicely as a test track.;)
I have had a similar experience in my previous Astra.
Michelin Pilots from new, put 2 new Falken ZE912 on the rear and basically the same thing happened as now.
Eventually solved by getting some more Pilots on.
Not checked the nuts, will do now though.
Will definitely rotate them round too.
Fortunately there's a by-pass near to home that doubles up nicely as a test track.;)
I have had a similar experience in my previous Astra.
Michelin Pilots from new, put 2 new Falken ZE912 on the rear and basically the same thing happened as now.
Eventually solved by getting some more Pilots on.
)
jon- said:
Put a few more PSI in the new tyres and see how it feels.
Bridgestone generally have very firm sidewalls. The latest breed of low rolling resistance touring tyres don't. That, coupled with the new block movement will cause what you're feeling.
Worse case, rotate them to the front and do a few burnouts.
Fixed that for you. Bridgestone generally have very firm sidewalls. The latest breed of low rolling resistance touring tyres don't. That, coupled with the new block movement will cause what you're feeling.
Worse case, rotate them to the front and do a few burnouts.
I've had this.
In my case the new tyres were cheap put on by the previous owner before sale. He also had tracking done.
It was the tyres were different sizes, despite being labeled the same.
Measure the circumference, there was 1/2 " difference on mine. Also the tracking wasn't right.
Don't take it for granted that just because the trackings done its done right.
In my case the new tyres were cheap put on by the previous owner before sale. He also had tracking done.
It was the tyres were different sizes, despite being labeled the same.
Measure the circumference, there was 1/2 " difference on mine. Also the tracking wasn't right.
Don't take it for granted that just because the trackings done its done right.
real4star said:
Does it tell you the number of ply's (is that even a word?) on the sidewall ?
6 ply fronts and 8 ply rears perhaps (IIRC eco tyres are stiffer to save fuel)
Checked the plie info this morning.6 ply fronts and 8 ply rears perhaps (IIRC eco tyres are stiffer to save fuel)
No idea what it all means but here you go:
Bridgestones:
Tread - 1 Polyester.
Sidewall - 1 Polyester + 2 Steel + 1 Polyamide
Dunlops:
Tread - 2 Steel + 3 Rayton + 1 Nylon
Sidewall - 1 Raych (or is it Ratch??)
So, not exactly like for like to make an easy comparison.
Can I assume that the addition of Steel in the Bridgestone sidewall therefore makes it stiffer - I have no idea what 'Raych' is though.
Fastra said:
real4star said:
Does it tell you the number of ply's (is that even a word?) on the sidewall ?
6 ply fronts and 8 ply rears perhaps (IIRC eco tyres are stiffer to save fuel)
Checked the plie info this morning.6 ply fronts and 8 ply rears perhaps (IIRC eco tyres are stiffer to save fuel)
No idea what it all means but here you go:
Bridgestones:
Tread - 1 Polyester.
Sidewall - 1 Polyester + 2 Steel + 1 Polyamide
Dunlops:
Tread - 2 Steel + 3 Rayton + 1 Nylon
Sidewall - 1 Raych (or is it Ratch??)
So, not exactly like for like to make an easy comparison.
Can I assume that the addition of Steel in the Bridgestone sidewall therefore makes it stiffer - I have no idea what 'Raych' is though.
Bridgestone are 1+1+2+1= 5 ply
The Dunlop has more plies (an extra layer) so stiffer construction.
(although I'm used to dealing with reinforced 4x4 tyres, car may be constructed differently)
Not sure if I'm much help, sorry
For those that don't know
Plies are the reinforcing layers held together by the rubber forming the tyres shape (Americans call them 'belts' like in steel belted radials)
No idea what Ratch/Raytch is either... composite material maybe another form of Kevlar?
Edited by real4star on Friday 14th June 13:08
Right.
Just had a phone call from a very nice man at Dunlop (I put my concerns to them via email through their website), and as a few of you have already said the Dunlops do indeed have a soft sidewall makeup and he knew exactly what I was trying to describe.
He explained that whilst badged 'Sport' these particular tyres are infact more aimed at comfort, so aren't as hard as their other 'Sport' models.
He also went onto say that it's quite a common complaint/issue and he'd actually like to see more tyre tests conducted using different combinations to give more of a real world outlook on things. I myself can't ever remember (apart from 4 Avons on the wifes Micra) replacing all four tyres at once on any car I've owned.
So, in conclusion, he recommended NOT increasing the pressures past an already high 36psi but swapping them rear to front instead.
He also asked me to let him know, as he always hears complaints but never really gets to know how anything gets solved.
He also agreed that screwing the hell out of the Bridgestones so that I could get another set of Dunlops was a great idea.
In hindsight I should have just got the same Bridestones (only an extra £10) as already on, but you always think you can improve things don't you.
Just had a phone call from a very nice man at Dunlop (I put my concerns to them via email through their website), and as a few of you have already said the Dunlops do indeed have a soft sidewall makeup and he knew exactly what I was trying to describe.
He explained that whilst badged 'Sport' these particular tyres are infact more aimed at comfort, so aren't as hard as their other 'Sport' models.
He also went onto say that it's quite a common complaint/issue and he'd actually like to see more tyre tests conducted using different combinations to give more of a real world outlook on things. I myself can't ever remember (apart from 4 Avons on the wifes Micra) replacing all four tyres at once on any car I've owned.
So, in conclusion, he recommended NOT increasing the pressures past an already high 36psi but swapping them rear to front instead.
He also asked me to let him know, as he always hears complaints but never really gets to know how anything gets solved.
He also agreed that screwing the hell out of the Bridgestones so that I could get another set of Dunlops was a great idea.
In hindsight I should have just got the same Bridestones (only an extra £10) as already on, but you always think you can improve things don't you.
The SP Sport 01s have quite a solid sidewall (comparatively)
My guess would be the new Sport BluResponse
My guess would be the new Sport BluResponse
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