What's the Griff on tyres

[profstoff]

I've got to get some new tyres for the Griff shortly and wondered what people favourite's were, and which ones I should avoid.

Thanks for your advice.

[steve-V8s]

You still on the standard 15x7 16x7.5 wheels ?

[profstoff]

steve-V8s said:

You still on the standard 15x7 16x7.5 wheels ?

Yes

[Sebster36]

Toyo TR1's are a popular choice for the standard Griff wheel dimensions, the fronts may have to be V rated rather than Z rated depending on widths required (I could not find any Z rated Toyos in the 15" 225 width I needed for my Griff) but that should not be seen as a problem vis a vis insurance or road handling/safety.

[tvrbob]

Sebster36 said:

but that should not be seen as a problem vis a vis insurance

Actually it is an issue for insurance. There is a step you must take. Your insurance company must be informed and agree (preferably in writing) to the use of lesser rating tyres. This has nothing to do with the speed you travel at or are limited to in the UK. It is classed as a modification. There shouldn't be any problems or change in cost but without their consent you will be liable to the 'failure to inform' clause in the event of any accident where tyre performance played a part. Many owners have gone through this and got this approval from their insurers so most of the TVR insurers are aware that it is becoming difficult to buy an appropriate tyre for the standard front rim.

[steve-V8s]

Yep Toyo TR1's seem the best option for road use. If you are after "track day" rubber A023r if you can find some or R888 seem popular.

[bigdods]

Or if you want to keep to the approved Z ratings Dunlop SP9000 come in the 15 inch size. I've got falken FK452's on the back and SP9000's on the front . Or at least I will by the time I go and collect the Chim from Topcats later this week :-)

[Toffer]

If you decide to go the TOYO route...they are single walled tyres not double (like those that had the TVR logo on).

At the TVR handbook tyre pressures, I found the TOYOs very "bouncy" and have gradually increased the pressure (psi) to 29F and 33R. (My Griff is poly-bushed.) Everything great now!

[Wildfire]

If you're interested I have a full set of Toyo T1-Rs with around 1000 on the front at 2000 on the rears which I would like to sell. Email me if you're interested.

[laz11]

bigdods said:

Or if you want to keep to the approved Z ratings Dunlop SP9000 come in the 15 inch size. I've got falken FK452's on the back and SP9000's on the front . Or at least I will by the time I go and collect the Chim from Topcats later this week :-)

ditto; On my second set of FK452s and very pleased with them

[The Moosehunter]

Probably the biggest contributions you can make to improving cornering on a Griff ( after driver improvements ) is to fit some Toyo 888's

Also don't believe the hype about these being no good in the wet, not strictly true

They don't cope as well with standing water as some others but the benefits far outweigh the negatives. ( unless you stack it into a hedge of course )

Don't expect too much in the way of longevity, if used properly.

[Hoover.]

I'm currently using Kumho V70A ECSTA available in correct fitting and speed rating..... strictly they are a road legal trackday tyre like the Toyo 888's ... I just wanted to try something different (awkward me)

So much more grippy then then Toyo T1R's I've got sitting in the shed...... although they are not a fan of standing water but I've managed 2 runs (approx 2hrs each) nows in horendous weather and they are ok if you keep your wits about you. On the fisrt run an Mazda RX8 had all its warning lights (traction contral, ABS/EBS or what ever lights coming on on the dash).

[profstoff]

Thanks for the comments so far. On other forums I've heard bad things about TR1s, mainly poor grip in wet and dry. Do they work okay on a Griff?

I don't really want to to 888's as I don't do many track days. I'm after good all round tyres for the road, with an occasional track day.

Chris - YHM

[V8 GRF]

I've had no problems with my Toyo TR1s what so ever in wet or dry.

[Sebster36]

tvrbob said:

Sebster36 said:

but that should not be seen as a problem vis a vis insurance

Actually it is an issue for insurance. There is a step you must take. Your insurance company must be informed and agree (preferably in writing) to the use of lesser rating tyres. This has nothing to do with the speed you travel at or are limited to in the UK. It is classed as a modification. There shouldn't be any problems or change in cost but without their consent you will be liable to the 'failure to inform' clause in the event of any accident where tyre performance played a part. Many owners have gone through this and got this approval from their insurers so most of the TVR insurers are aware that it is becoming difficult to buy an appropriate tyre for the standard front rim.

Nicely put! Its what I was very loosly implying in "not a problem" but no where nearly as well

I also can confirm that I have had no grip issues wet or dry..

[Zumbruk]

profstoff said:

Thanks for the comments so far. On other forums I've heard bad things about TR1s, mainly poor grip in wet and dry.

Ahem.



This is me at the Herts Aero sprint at Debden on the 5th Oct. At one point I was 3 seconds clear of the second placed TVR. On T1-Rs.

(P.S. Sorry it isn't a Griff.)

Edited by Zumbruk on Tuesday 28th October 13:54

[grumpy bear]

Wildfire said:

If you're interested I have a full set of Toyo T1-Rs with around 1000 on the front at 2000 on the rears which I would like to sell. Email me if you're interested.

You have mail

[FlipFlopGriff]

Toffer said:

If you decide to go the TOYO route...they are single walled tyres not double (like those that had the TVR logo on).

At the TVR handbook tyre pressures, I found the TOYOs very "bouncy" and have gradually increased the pressure (psi) to 29F and 33R. (My Griff is poly-bushed.) Everything great now!

29 & 33.
We've been running Toyos for the last 5 years on the 500 which is driven every day in any weather and they have been great, both wet and dry. Nitrons and poly bushes and 24 front 26 rear. This gives even wear so must be about right. I know when the fitters put them at 30 its like driving a skateboard so I dread to think what 33 is like.
FFG

[FlipFlopGriff]

Toffer said:

If you decide to go the TOYO route...they are single walled tyres not double (like those that had the TVR logo on).

At the TVR handbook tyre pressures, I found the TOYOs very "bouncy" and have gradually increased the pressure (psi) to 29F and 33R. (My Griff is poly-bushed.) Everything great now!

29 & 33.
We've been running Toyos for the last 5 years on the 500 which is driven every day in any weather and they have been great, both wet and dry. Nitrons and poly bushes and 24 front 26 rear. This gives even wear so must be about right. I know when the fitters put them at 30 its like driving a skateboard so I dread to think what 33 is like.
FFG

[Zumbruk]

FlipFlopGriff said:

Toffer said:

If you decide to go the TOYO route...they are single walled tyres not double (like those that had the TVR logo on).

At the TVR handbook tyre pressures, I found the TOYOs very "bouncy" and have gradually increased the pressure (psi) to 29F and 33R. (My Griff is poly-bushed.) Everything great now!

29 & 33.
We've been running Toyos for the last 5 years on the 500 which is driven every day in any weather and they have been great, both wet and dry. Nitrons and poly bushes and 24 front 26 rear. This gives even wear so must be about right. I know when the fitters put them at 30 its like driving a skateboard so I dread to think what 33 is like.

That was my response, too. I ran them at 22/24 for a while, but was getting some shoulder wear, which my mender reckoned was symptomatic of under-pressurisation, so I went up to 24/26.