Toyo TR1 - Directional?
Discussion
Guys,
I have just purchased a set of Toyo TR1 tyres and have a question about the tread pattern and rotational direction.
In the sidewalls there is a clear indiciation for 'OUTSIDE' and 'INSIDE' wall. However this would mean that the directional tread pattern is reversed on one side of the vehicle.
I have contacted Toyo and they say to go with the tyre-wall indication and that one side of the vehicle will have a reverse tread pattern.
Anyone else heard of this?
I have just purchased a set of Toyo TR1 tyres and have a question about the tread pattern and rotational direction.
In the sidewalls there is a clear indiciation for 'OUTSIDE' and 'INSIDE' wall. However this would mean that the directional tread pattern is reversed on one side of the vehicle.
I have contacted Toyo and they say to go with the tyre-wall indication and that one side of the vehicle will have a reverse tread pattern.
Anyone else heard of this?
Chaoswill said:
Guys,
I have just purchased a set of Toyo TR1 tyres and have a question about the tread pattern and rotational direction.
In the sidewalls there is a clear indiciation for 'OUTSIDE' and 'INSIDE' wall. However this would mean that the directional tread pattern is reversed on one side of the vehicle.
I have contacted Toyo and they say to go with the tyre-wall indication and that one side of the vehicle will have a reverse tread pattern.
Anyone else heard of this?
I understand your query and agree with you that it sounds an odd situation. I have just purchased a set of Toyo TR1 tyres and have a question about the tread pattern and rotational direction.
In the sidewalls there is a clear indiciation for 'OUTSIDE' and 'INSIDE' wall. However this would mean that the directional tread pattern is reversed on one side of the vehicle.
I have contacted Toyo and they say to go with the tyre-wall indication and that one side of the vehicle will have a reverse tread pattern.
Anyone else heard of this?
Can you show a picture of the direction tread pattern? - or a link to a picture? (of that specific tyre model)
https://www.toyo.co.uk/tire/pattern/proxes-tr1
Looks like asymmetric rather than directional, despite the sweep of the groves on one side. The main thing for dry performance is that outer shoulder of fairly solid tread block, so that will always be on the outside of car. Running the 'v' forwards or backwards won't have all that much effect on rain clearing, despite intuition thinking it ought to sweep it into the other channel.
Looks like asymmetric rather than directional, despite the sweep of the groves on one side. The main thing for dry performance is that outer shoulder of fairly solid tread block, so that will always be on the outside of car. Running the 'v' forwards or backwards won't have all that much effect on rain clearing, despite intuition thinking it ought to sweep it into the other channel.
Exactly the same question from me on TR1s on my 111S - basically, are you saying that these tyres have an outside but are NOT directional?
That seems odd to me...
Having just re-red the thread, it seems we're agreed that while it seems illogical, that's how it's now done.
But it definitely looks odd. And I don't see those patterns on the back of new performance cars...
Cheers
Andy
That seems odd to me...
Having just re-red the thread, it seems we're agreed that while it seems illogical, that's how it's now done.
But it definitely looks odd. And I don't see those patterns on the back of new performance cars...
Cheers
Andy
Edited by Ferrari456MGT on Tuesday 14th June 09:24
With this tyre, same as any other similar asymmetrical tyre just make sure the “outside” marker faces outside and don’t worry about what the groove pattern looks like or whether it looks odd from one side of the car to the other.
If a tyre is ALSO directional then you’d need to also observe the rotation arrow on the tyre but I can’t off the top of my head think of any directional AND asymmetrical tyre as that would be a pain the arse.
If a tyre is ALSO directional then you’d need to also observe the rotation arrow on the tyre but I can’t off the top of my head think of any directional AND asymmetrical tyre as that would be a pain the arse.
SuperPav said:
With this tyre, same as any other similar asymmetrical tyre just make sure the “outside” marker faces outside and don’t worry about what the groove pattern looks like or whether it looks odd from one side of the car to the other.
If a tyre is ALSO directional then you’d need to also observe the rotation arrow on the tyre but I can’t off the top of my head think of any directional AND asymmetrical tyre as that would be a pain the arse.
Pirelli P-Zero Corsas on my Vantage are I think - I distinctly remember having to buy different left and right side tyres for the rear.If a tyre is ALSO directional then you’d need to also observe the rotation arrow on the tyre but I can’t off the top of my head think of any directional AND asymmetrical tyre as that would be a pain the arse.
As others have said, asymmetric designs are pretty common now. If you can see the 'Outside' markers on all four sidewalls, the tyres are fitted correctly. The PS4Ss I've recently had fitted are asymmetric.
The orientation of an asymmetric tyre on the rim is the critical part. After that, it can go anywhere on the car. A directional tyre can be oriented either way on a rim, depending on which side of the car it is going to be fitted to. After that, it must stay on that side of the car.
It seems counterintuitive, but the tyre makers know what they are doing.
The orientation of an asymmetric tyre on the rim is the critical part. After that, it can go anywhere on the car. A directional tyre can be oriented either way on a rim, depending on which side of the car it is going to be fitted to. After that, it must stay on that side of the car.
It seems counterintuitive, but the tyre makers know what they are doing.
Thorburn said:
Pirelli P-Zero Corsas on my Vantage are I think - I distinctly remember having to buy different left and right side tyres for the rear.
Well there you go then! 
Just looked that up, hells bells that's a complicated tyre offering. Directional but symmetrical for front axle, completely different tyre profile asymmetrical + directional for rear axle. So there's 3 types of tyres you have to buy even if you don't have staggered wheels! Mental. Hope the performance is worth it.SuperPav said:
Well there you go then! Just looked that up, hells bells that's a complicated tyre offering. Directional but symmetrical for front axle, completely different tyre profile asymmetrical + directional for rear axle. So there's 3 types of tyres you have to buy even if you don't have staggered wheels! Mental. Hope the performance is worth it.
Nope, they're bloody awful things. Michelin Pilot Sports next time. Just looked that up, hells bells that's a complicated tyre offering. Directional but symmetrical for front axle, completely different tyre profile asymmetrical + directional for rear axle. So there's 3 types of tyres you have to buy even if you don't have staggered wheels! Mental. Hope the performance is worth it.Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff