Extreme Road Legal Track Day Tyres
Discussion
They’re sending me ads on Facebook and I was wondering if anyone had used them...?
Yes, they’re remoulds!
205 60 13’s are £120 each!
https://extreme-tyres.com/tyres/
Yes, they’re remoulds!
205 60 13’s are £120 each!
https://extreme-tyres.com/tyres/
Old attitudes persist.
Remoulding technology has moved on stratospherically since the days of glueing on a new tread band. The cost of large-scale ultra-sound and x-ray scanning has plummeted meaning the carcasses can be examined in detail before they are re-used and dodgy ones rejected, and after that the process for re manufacture is exactly the same as for a new tyre, with the building up of layers of rubber and the final moulding/vulcanising taking place in an autoclave.
I would rather have an EU sourced reputably produced remould over an age-hardened part-worn or a far-eastern Alibaba special.
Unfortunately thought the market doesn't agree, and most attempts to do remoulding properly struggle to compete with the ditchfinders. A good example is Marix - the remoulding arm of Marangoni in Italy. Their off-road and commercial tyres still sell well but their attempt to break into the road and competition market failed not because the product was duff but because they were undercut by cheap Asian offerings and folk instantly thinking new was better than remanufactured.
Attitudes may change in future though when the environmental impact of tyre manufacture starts to hit home.
Remoulding technology has moved on stratospherically since the days of glueing on a new tread band. The cost of large-scale ultra-sound and x-ray scanning has plummeted meaning the carcasses can be examined in detail before they are re-used and dodgy ones rejected, and after that the process for re manufacture is exactly the same as for a new tyre, with the building up of layers of rubber and the final moulding/vulcanising taking place in an autoclave.
I would rather have an EU sourced reputably produced remould over an age-hardened part-worn or a far-eastern Alibaba special.
Unfortunately thought the market doesn't agree, and most attempts to do remoulding properly struggle to compete with the ditchfinders. A good example is Marix - the remoulding arm of Marangoni in Italy. Their off-road and commercial tyres still sell well but their attempt to break into the road and competition market failed not because the product was duff but because they were undercut by cheap Asian offerings and folk instantly thinking new was better than remanufactured.
Attitudes may change in future though when the environmental impact of tyre manufacture starts to hit home.
Edited by Evercross on Friday 22 February 10:40
grudas said:
jon- said:
I don't see where it states these are road legal?
If they are I'll get them to send me some sets and test them against something like the R888.
the first tyre says road legal semi slick in the description.. "extreme wr1"If they are I'll get them to send me some sets and test them against something like the R888.
As soon as my track car is built I'll run a test. I've got time at MIRA dry and wet handling this year.
Two things worth bearing in mind:
1) Serious race teams will only use a pukka competition tyre for a short period of time before it gets chucked in the back of their transporter. Most teams will happily sell such tyres on rather than pay disposal costs. Purchase price can be ridiculously low. Would you rather have a Yoko 48R with 100 miles on it, or a slick with 40km on it, or a brand new inferior tyre for many times as much? That's a genuine question, either answer is valid! Just something to consider, that's all. I'm an occasional club single seater racer, and at my low budget end of the grid it's common to run on secondhand slicks; I've been doing it for years.
2) Making changes to the grip a tyre can produce will generate higher cornering loads. Obviously this stresses components like wheel bearings more, but it also results in greater roll, pitch and dive. Firstly, this will take the suspension out of its designed limits. For example, some cars are deliberately designed with toe/camber characteristics that change throughout travel affecting handling subtley, e.g. most modern Lotuses, and this will be tuned to the tyres fitted as standard and the loads they produce. Secondly, fitting the different tyre could also require different geometry to work optimally, for example more camber.
1) Serious race teams will only use a pukka competition tyre for a short period of time before it gets chucked in the back of their transporter. Most teams will happily sell such tyres on rather than pay disposal costs. Purchase price can be ridiculously low. Would you rather have a Yoko 48R with 100 miles on it, or a slick with 40km on it, or a brand new inferior tyre for many times as much? That's a genuine question, either answer is valid! Just something to consider, that's all. I'm an occasional club single seater racer, and at my low budget end of the grid it's common to run on secondhand slicks; I've been doing it for years.
2) Making changes to the grip a tyre can produce will generate higher cornering loads. Obviously this stresses components like wheel bearings more, but it also results in greater roll, pitch and dive. Firstly, this will take the suspension out of its designed limits. For example, some cars are deliberately designed with toe/camber characteristics that change throughout travel affecting handling subtley, e.g. most modern Lotuses, and this will be tuned to the tyres fitted as standard and the loads they produce. Secondly, fitting the different tyre could also require different geometry to work optimally, for example more camber.
I remember getting 17 (yes SEVENTEEN) part-worn Pirelli P-Zero Corsa tyres (from a Porsche Cup team when their control tyre changed size) for £70 as long as I could pick them up.
it cost me more in petrol at 6 tyres a trip, than the tyres cost.
They were great tyres, but the barge that is an e34 M5 ate a set a day.
it cost me more in petrol at 6 tyres a trip, than the tyres cost.
They were great tyres, but the barge that is an e34 M5 ate a set a day.
TroubledSoul said:
The majority of the top drivers in the hillclimb I compete in are using Extremes. Turn your nose up all you like but these tyres are winning events all over Europe. I'll be trying them myself at some point.
Good point well made. To be fair though, the requirements for a hillclimb tyre are rather unusual and niche...TroubledSoul said:
RobM77 said:
Good point well made. To be fair though, the requirements for a hillclimb tyre are rather unusual and niche...
Think it's list 1a and 1b now that are in use.
My point being that with hillclimbs and sprints you're looking for fantastic performance for under a minute of running from almost cold up to quite hot temperatures from the regular cornering. All those extreme heat cycles would wear a tyre out very quickly, so for a given budget, more sets of these cheaper tyres are going to perform better than one set of very worn premium brand tyres.Gassing Station | Track Days | Top of Page | What's New | My Stuff