Do Tyres go off?
Discussion
I currently have PP3's on my bike and they are about 1500miles old. They have done 2 half day track days and performed well.
After pulling the bike out of the garage for the 1st time this year, the tyres do seem a little hard, is this just due to the colder temps or could they have gone past there best? I can also see the different compounds in the tyres as there is a clear line.
I just don't have as much confidence in them, as I did have a bum clenching moment last week when exiting a roundabout, as I accelerated hard in 2nd and I could really feel the rear slide ( must have looked good) but s
t me up!
After pulling the bike out of the garage for the 1st time this year, the tyres do seem a little hard, is this just due to the colder temps or could they have gone past there best? I can also see the different compounds in the tyres as there is a clear line.
I just don't have as much confidence in them, as I did have a bum clenching moment last week when exiting a roundabout, as I accelerated hard in 2nd and I could really feel the rear slide ( must have looked good) but s
t me up!
moanthebairns said:
Nords said:
Only if the tyres have a blue sheen on the edges are they knackered, that means really, really heat cycled...
Eh you sure about that. I thought it was just the oils releasing from the rubber.
My tyre is a Metzeler M7RR. It's done two track days (well one and a half), that's it, and I certainly haven't been pushing it to it's limits.
I haven't used tyre warmers, so they've had approx 10 heat cycles, but as they're a road tyre I'm lead to believe that heat cycles aren't as much of an issue as it would be with slicks.
I haven't used tyre warmers, so they've had approx 10 heat cycles, but as they're a road tyre I'm lead to believe that heat cycles aren't as much of an issue as it would be with slicks.
LoonR1 said:
Doesn't matter, it's still not true.
Got to love the proof by blatant assertion...From http://biketrackdayshub.com/motorcycle-tyre-wear-g...
Motorcycle Blue Tyres
You often see the question come up ‘why are my tyres blue’ or ‘what’s this blue stuff on my tyres’ with people suggesting that when you see it the tyres are done. This isn’t completely true.
What makes it blue? – Motorcycle tyres actually contain oils that keep the tyre soft and the blue/green tint you can see on your tyres is just the oils coming to the surface.
Why are they on the surface? – After the tyres have been used to the point where they gain significant heat, when they cool down again (this is one heat cycle) the oils in the tyre will often come to the surface. When you go back out and ride the bike these surface oils are scrubbed off and it’s only when you come back in and let the tyres cool down again that you’ll see more oils coming to the surface.
Each time you take a tyre through a heat cycle you are losing the oils that keep the tyre soft, so the more heat cycles a tyre has been through the less effective the rubber is going to be for you.
As a side note, heat cycles will affect track tyres a lot worse than road biased tyres, as road tyres are expected to go through these cycles.
The ones I had, had been mega temp cycled, and were knackered! Plently of tread still but no grip...
clen666 said:
My tyre is a Metzeler M7RR. It's done two track days (well one and a half), that's it, and I certainly haven't been pushing it to it's limits.
I haven't used tyre warmers, so they've had approx 10 heat cycles, but as they're a road tyre I'm lead to believe that heat cycles aren't as much of an issue as it would be with slicks.
Yep, these were supercorsas in trackday compounds so more likely to be effected. I'm not saying this is the same as your case, just that heat cycling can have a neg effect on tyres. I have experienced exactly that...I haven't used tyre warmers, so they've had approx 10 heat cycles, but as they're a road tyre I'm lead to believe that heat cycles aren't as much of an issue as it would be with slicks.
Nords said:
LoonR1 said:
Doesn't matter, it's still not true.
Got to love the proof by blatant assertion...From http://biketrackdayshub.com/motorcycle-tyre-wear-g...
Motorcycle Blue Tyres
You often see the question come up ‘why are my tyres blue’ or ‘what’s this blue stuff on my tyres’ with people suggesting that when you see it the tyres are done. This isn’t completely true.
What makes it blue? – Motorcycle tyres actually contain oils that keep the tyre soft and the blue/green tint you can see on your tyres is just the oils coming to the surface.
Why are they on the surface? – After the tyres have been used to the point where they gain significant heat, when they cool down again (this is one heat cycle) the oils in the tyre will often come to the surface. When you go back out and ride the bike these surface oils are scrubbed off and it’s only when you come back in and let the tyres cool down again that you’ll see more oils coming to the surface.
Each time you take a tyre through a heat cycle you are losing the oils that keep the tyre soft, so the more heat cycles a tyre has been through the less effective the rubber is going to be for you.
As a side note, heat cycles will affect track tyres a lot worse than road biased tyres, as road tyres are expected to go through these cycles.
The ones I had, had been mega temp cycled, and were knackered! Plently of tread still but no grip...
I'm sure tyres can go off but in 99% of cases I bet it's in your head.
My mate would always ask me for advice on wether to change his track tyres as he'd be convinced they were worn out and sliding. I'd ride it for a session and it would be absolutely fine. He'd then get another day or two out of it as his mind was at ease.
It's (probably) all in your head. I wear my tyres down till the tread has dissappeared and they still grip very well at quite a quick pace
My mate would always ask me for advice on wether to change his track tyres as he'd be convinced they were worn out and sliding. I'd ride it for a session and it would be absolutely fine. He'd then get another day or two out of it as his mind was at ease.
It's (probably) all in your head. I wear my tyres down till the tread has dissappeared and they still grip very well at quite a quick pace
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