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Tyre sizes possible

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Discussion

nightSpirit

Original Poster:

907 posts

86 months

Wednesday 27th April 2011
quotequote all
On the 18" spiders (stock width on Tamora) what tyre width can you get away with front and rear? the fronts are stretched at 225/35 and the rears look like they could handle more than 235/40.

I wanted to fit some a048s or r888s to the car but the sizes are different...any thoughts?

Tyre Smoke

10,012 posts

179 months

Wednesday 27th April 2011
quotequote all
I would have thought you could easily go 255/35/18 on the back and 245/30/18 on the fronts, perhaps 245/35/18.

nightSpirit

Original Poster:

907 posts

86 months

Wednesday 27th April 2011
quotequote all
anyone have a preference for 888/A048 or other trackday rubber?

fredd1e

590 posts

138 months

Wednesday 27th April 2011
quotequote all
The front wheel wells usually struggle with 225/40x18s though some fare better than others.
The rears are usually safe with 255/35x18s .
However a lot is dependant on suspension/settings and if your body shell is amenable to the wider or taller tyres.

shep1001

4,122 posts

107 months

Wednesday 27th April 2011
quotequote all
255/40 on the rear works fine. Wider tyres on the front will rub the light access panels unless you have modded them which you have.

Shep
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aubrey9160

396 posts

100 months

Wednesday 27th April 2011
quotequote all
245 40 rub on the rear of my car when driven hard

fredd1e

590 posts

138 months

Wednesday 27th April 2011
quotequote all
255/40 sounds a little tall and I'd have thought would rub a lot as its significantly taller than the original 235/40 whereas the 255/35 is a smidgeon under and thus helps keep the tyre away from the top on the inner arch on bump.

SeiW500

234 posts

86 months

Thursday 28th April 2011
quotequote all
Got 265/35R18's on the back of mine & 225/40R18's front, the fronts rub a bit on full lock but nothing to worry about, the rears are fine... Tyres are Toyo R1R's shame they don't do a 225/35R18 ???

Edited by SeiW500 on Thursday 28th April 14:11

DumDum

114 posts

74 months

Thursday 28th April 2011
quotequote all
Im running 255/35/18 with no issues, on the rear.
Vredestein Ultrac Sessanta. Really really impressed with these so far, mega grip.

DumDum

114 posts

74 months

Friday 29th April 2011
quotequote all
SeiW500 said:
Got 265/35R18's on the back of mine & 225/40R18's front, the fronts rub a bit on full lock but nothing to worry about, the rears are fine... Tyres are Toyo R1R's shame they don't do a 225/35R18 ???

Edited by SeiW500 on Thursday 28th April 14:11
Is that a Sagaris or T350?/Tamora?

Is that on standard 8.5 rears?

geordieexpat

481 posts

110 months

Friday 29th April 2011
quotequote all
i fitted 19" to the sag with no issues

Speed eight

336 posts

140 months

Friday 29th April 2011
quotequote all
Tyres with a width of 265mm require a rim width of 9.5" for optimum fit and thus optimum performance.
This, 9.5" width, I think is the rim width of the 19" diameter wheels from TVR power.

They, the 265mm tyres can be persuaded to fit onto a rim as narrow as 9" and as wide as 10.5"
But both of these situations now detract from the optimum fit size and thus the performance of the tyre becomes compromised and so somewhat a pointless exercise. As surely one is looking for the best performance from the tyres. The side wall situation of the tyre is a very important part of the tyres performance and if compromised by rim width, too narrow or too wide the performance will suffer.

The 255 width tyre is optimised to a rim width of 8.5" As one finds on the popular aftermarket 18" diameter wheels.

Regards.
Speed eight.

LeeT350c

575 posts

99 months

Friday 29th April 2011
quotequote all
Toyo's specs for their R1R's. I have gone 255/35 on the rears and 225/40 on the fronts. Standard 18" spiders.



Cheers. Lee.