Tyre age

[FlipFlopGriff]

ChilliWhizz said:

FFG, what wheel sizes/tyre sizes do have? I'm seriously thinking of going R1R's, according to the Toyo website they do 225/45/16's (which I have on the front) but they don't do 245/45/16's (which I have on the rear).... I'm guessing you've either got 17" rims on the rear or you've gone for 225/45's on 16" rears (significant reduction in amount of rubber on the road and reduced rolling radius?)

Thanks in advance,

Chilli

225/50/16 - factory pre cat Griff size. Only V rated though but Mannings were fine with this.
had to go 205/50/15 (standard 205/55/15) but raised the front end a bit to compensate so it looks right. Still got original AMIL wheels.
FFG

[ChilliWhizz]

Thanks FFG....
So, 225/50's on the rear would increase the rolling radius by a couple of mm, give the same tyre width as the fronts, but have 20mm less tread width, which is about 8.5 percent

Hmm, three choices then I guess,
New T1R's on the rears - cheapest quickest option
R1R's all round but lose some tread with on the rears
Put 17" rims on and retain the 225 and 245 tread widths...

Or, go 17" with 8" rims on the rears and fit 255/40's........

decisions decisions.........

So, wider tyres means more grip/traction eh? Not necessarily....
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by ChilliWhizz on Thursday 18th June 08:57

[phazed]

ChilliWhizz said:

Or, go 17" with 8" rims on the rears and fit 255/40's........

decisions decisions.........

Only sensible thing to do.

These are 255/40/17s.



You know you want to!

[QBee]

Richard, one thing Peter omits to mention is that he has switched to 5 stud hubs. This gives him a much better range of wheel widths available to take the wider tyres. If you stay with 4 stud hubs the width range is limited, but you should hopefully be able to find some 8J rears. It's obvious, but there is a minimum and maximum tyre width for each wheel width.

The other thing he omits to remind us is that he has shaved the inside of his wheel arch bodywork to accommodate the wider rubber. If you go to 255s you may need to do the same to your car, as well as raising the ride height.

Peter, please do correct me if I am wrong. It's the memory of someone turning up at Bedford last year with a nice brand new set of wide R888s, catching at all 4 corners, and us having to spanner away to reduce the problem, that is ringing my alarm bells

[phazed]

Current car 5 stud but green chim 4 stud.

Yes, my rear arches are trimmed on both cars but don't let that put you off as it is only a couple of hours work and a piece of pee!

I've never had any problems with tyres rubbing on the front arches even running 235/40/17 Triple 8s.

[Mr Plow]

ChilliWhizz said:

Peter, current T1R's are 225/45/16 on the front and 245/45/16 on the rear, according to the Toyo website they do R1R's in the 225 section width but not in the 245....

Back to the drawing board

Hi

I've been looking at getting some R1R's for mine. I'm currently running 225/45/16 on the front and 225/50/16 on the rear. I'm struggling to find some 225.45.16 Toyo R1R's. I believe Toyo have discontinued this size? Not sure what the alternative is?

Cheers

[FlipFlopGriff]

Mr Plow said:

Hi

I've been looking at getting some R1R's for mine. I'm currently running 225/45/16 on the front and 225/50/16 on the rear. I'm struggling to find some 225.45.16 Toyo R1R's. I believe Toyo have discontinued this size? Not sure what the alternative is?

Cheers

Not many in the smaller sizes. What about 225/50/16?
FFG

[Mr Plow]

FlipFlopGriff said:

Not many in the smaller sizes. What about 225/50/16?
FFG

From memory I think this size is too big on the front as it causes clearance problems with the outriggers. I'll have a look though to double checking using the back wheels.

Cheers

[Mr Plow]

Mr Plow said:

ChilliWhizz said:

Peter, current T1R's are 225/45/16 on the front and 245/45/16 on the rear, according to the Toyo website they do R1R's in the 225 section width but not in the 245....

Back to the drawing board

Hi

I've been looking at getting some R1R's for mine. I'm currently running 225/45/16 on the front and 225/50/16 on the rear. I'm struggling to find some 225.45.16 Toyo R1R's. I believe Toyo have discontinued this size? Not sure what the alternative is?

Cheers

OK, managed to find some 245/45/16 R1R's. Only problem is they are V rated. I'll have to talk to the insurance company to check with them before I order.

I never thought tyres would be such a challenge to buy

[davidindevon]

So can anyone tell me what age my tyres are please?

It says....

DOT NBTB L62125

Which means nothing to me at all.
Thanks

[QBee]

There will be a 4 digit code, quite small but note wallets writing, somewhere on the tyre wall.
First two are the week number, last two the year

[QBee]

Just been outside and checked my R1Rs.
Passenger side, the code is on the side facing the engine., so not visible with the wheel on the car.
Driver's side it is visible



So this one is week 17 of 2013.
It was a brand new tyre last autumn, so clearly had sat on a shelf for over two years.

[SILICONEKID345HP]

Stick those rainsport on for road use , they are spot on.

[jesfirth]

In terms of age of tyre and grip levels I have found that after about 12 months and a number of heat cycles takes a toll on tyres. My use is sprinting but it will be the same for road tyres. I am presently using last years R888's (because I am stingy) and I am roughly 1 second off my 2015 pace on a 60 second run. The tyres still have decent tread but I definitely have much less grip in the corners as 2 spins yesterday at Hethel demonstrates. As a result a new set of R888R's going on this week.

Change tyres as soften as you can and buy the best you can afford. The contact patch on the road is tiny and it makes a huge difference in an emergency.