18" Spider Wheels

Author
Discussion

JasperJ

Original Poster:

322 posts

242 months

Wednesday 1st December 2004
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Just a quick sense check - if 18" Spider wheels were removed from a Tuscan, I assume they would be fine on a Tamora.. anyone know any different??

chris watton

22,478 posts

266 months

Wednesday 1st December 2004
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yep, they're exactly the same Jasp No difference whatsoever

JasperJ

Original Poster:

322 posts

242 months

Thursday 2nd December 2004
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thanks Chris.

hilti

299 posts

245 months

Thursday 2nd December 2004
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Wheels are the same, but tyre profiles are different.

JasperJ

Original Poster:

322 posts

242 months

Thursday 2nd December 2004
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John, thanks - do you know what the Tuscan is vs a Tamora/350? The tyres on the ones I'm looking at will need replacing anyway. What are most people using?

hilti

299 posts

245 months

Thursday 2nd December 2004
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I'll double check tonight and let you now.

J

Targarama

14,656 posts

289 months

Thursday 2nd December 2004
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I believe the front and rear wheels are slightly different widths and/or offset though - better check just so you don't get them on the wrong way round.

chris watton

22,478 posts

266 months

Thursday 2nd December 2004
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Yes, they are slightly different widths, as I found out (to my cost!) when I bought my Tam,,, when it was serviced, the guys noticed I had 3 front tyres on my Tam, one on the back!!! The rear wheels are slightly wider than the front ones!

tvrinbfg

1,458 posts

290 months

Thursday 2nd December 2004
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The TVR Factory recommed four Tuscan 18" front alloys for fitment to the Tamora, but I can't remember the tyres sizes.

chris watton

22,478 posts

266 months

Thursday 2nd December 2004
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tvrinbfg said:
The TVR Factory recommed four Tuscan 18" front alloys for fitment to the Tamora, but I can't remember the tyres sizes.


The front 18" don't fit properly on the rear (at least they don't on mine!), as the centre cap cannot be fitted, leaving the hugh centre wheel nut exposed!

hilti

299 posts

245 months

Friday 3rd December 2004
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Tamora tyre sizes:-

Front 225x35x18 87Y

Rear 235x40x18 91Y

I believe that the speed ratings are unique to TVR.

Don't know what the Tuscan Tyre profiles are, but i do know that the changed the profile on the front. Was, I think 215 or 225, is now 235x35?

John.

hilti

299 posts

245 months

Friday 3rd December 2004
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The rear wheels are same width as front, I think, but different offset, (more dish)

Targarama

14,656 posts

289 months

Friday 3rd December 2004
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Thinking about it, the other way to spot the difference in front/rear wheels is by how far the wheel bolt goes into it's little 'alcove' in the wheel. The front bolts stick out further if you take a look.

chris watton

22,478 posts

266 months

Friday 3rd December 2004
quotequote all
hilti said:

The rear wheels are same width as front, I think, but different offset, (more dish)


I was told that my geometry could not be set up correctly until I had a rear wheel (Not the front wheel which was on my car at the time, not now though, I bought a new rear wheel!!) because a; the offset was different and b; the width was slightly narrower on the front (only about 5mm, which didnt affect the tyres)
Before I changed my front rear wheel, the back end was VERY skittish under 'brisk' acceleration,, after the wheel was changed, not a hint of skittishness (is that a word!!!) I was amazed at the difference in handling over something so seemingly trivial!

JasperJ

Original Poster:

322 posts

242 months

Saturday 4th December 2004
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thanks everyone.. is there any way to tell the rear wheels from the front when they are off the car?

chris watton

22,478 posts

266 months

Saturday 4th December 2004
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JasperJ said:
thanks everyone.. is there any way to tell the rear wheels from the front when they are off the car?


Hmm, not sure, It may be best to order one new and specify front or rear (that's what I did),, as soon as you put the front wheel on the rear, you'd be able to tell!!

PHTVR

11 posts

253 months

Saturday 4th December 2004
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I believe Tuscan front 18" rims are 40mm profile 235mm wide while Tamora must be 35mm and a max of 225mm wide.

Rear rims are much deeper dished, fitted wrong way round tyres will rub on the wheel arch - found this out the hard way at a track day when putting on for the first time a second hand set of rims off an X tuscan.

Some batches of rims actually have a R for rear printed on the inside of the rear rims in the centre hub area.

tvrinbfg

1,458 posts

290 months

Saturday 4th December 2004
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Just in from the pub! TVR told me you fit four 18" Tuscan front alloys to the Tamora.

They've also been recommending you do this with the Cerbera too for some considerable time, but with that model, you have to grind the rear Cerbera hub down 3-4 mm so that the caps go on. I guess/assume it is the same for the Tamora.

JasperJ

Original Poster:

322 posts

242 months

Sunday 5th December 2004
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Chirs said:
Hmm, not sure, It may be best to order one new and specify front or rear (that's what I did),, as soon as you put the front wheel on the rear, you'd be able to tell!!


Thanks, unfortunately was trying to buy a second hand set...

I'm a little bit of confused now (not difficult) !!

Are we saying that the Tuscan 18" Wheels will fit, but I need to check that they are two rears and two fronts.. Hopefully this can be done as some have an R for rear printed on the inside of the rear rims in the centre hub area. But when I do get them I will need to change the tyres to ensure they are - Front 225x35x18 87Y & Rear 235x40x18 91Y.

Anyone agree????

thanks again.

PS - Maddog pehaps another 'tip' for the site, once I get to the bottom of it..

21tvr

655 posts

262 months

Sunday 5th December 2004
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Martin if you stuck to the rubber that is meant to be fitted to these rims you would fit

Front: 235/40 ZR18 In say a Toyo Proxes T1S or similar
Rear: 245/40 ZR18

You could fit a 35 or even a 30 profile but what you will gain in dry cornering ability will be wipped out by the loss in ride comfort - in fact you may well be tramlining more with a 35 profile

You could try stretching to a 255 width on the rear but I wouldn't like to then drive at speeds up to 150 just in case the tyre decided it really didn't want to stay on the rim

Huge debate on manufacturer, I drove on both Bridgestone and Toyo's and found that I had markedly more control with the Toyo's
i was tempted to go for Yokohama's as they are meant to be very good in the dry
Just be careful if you go for tyres on price alone because there are some 'grey' imports out there that are cheap but the compound was meant for South America or Japan or some very different climate to our carp one!

hope this helps

sp