Anyone fitted 18” front and rear?

[SwedishTVR]

hi, has any of you managed to fit 18” wheels front and rear on the Griffith?

[MikeE]

Plenty of people have fitted 18” Spiders front and rear. What’s the specific question?

[SwedishTVR]

I like to know if the 18” will fit, the body is off my chassis and before i dare to buy the new wheels, I like to hear if some of you could confirm if these would fit front and rear.

[eff eff]

TVR 18" rear Spiders fit front and back, remember they're 5 stud and you need to run 35 profile tyres

Edited by eff eff on Thursday 11th June 20:24

[SwedishTVR]

Thanks for your reply, looks really good, i presume you have no issues with the front tyres touching the outrigger when steering to the max positions?

[Jobster]

eff eff said:

TVR 18" rear Spiders fit front and back, remember they're 5 stud and you need to run 35 profile tyres

Edited by eff eff on Thursday 11th June 20:24

Looks good, prefer the staggered set though.

Edited by Jobster on Saturday 13th June 21:55

[RichB]

Personally I think 18" wheels on the front spoils the poise of the car. I have no idea what it does to the handling at high speed but I imagine the high nose may have a detrimental effect.

[Jobster]

RichB said:

Personally I think 18" wheels on the front spoils the poise of the car. I have no idea what it does to the handling at high speed but I imagine the high nose may have a detrimental effect.

IMHO, this is much better, 16 front 18 rear:

but than again, some love the daughter, some the mother.......

[eff eff]

SwedishTVR said:

Thanks for your reply, looks really good, i presume you have no issues with the front tyres touching the outrigger when steering to the max positions?

I have a Sportmotive Evolution chassis which was designed to run 18's so there are no clearance issues, the out riggers are in the standard position. I think 18's may rub on the standard wishbones on full lock, rack stops fix that. I did think about running 16 front and 18 rear and I still might try it. The evolution chassis has a different front end geometry, closer to the later T cars and I haven't noticed any particular ride issues.

Edited by eff eff on Sunday 14th June 12:53

[MikeE]

Jobster said:

RichB said:

Personally I think 18" wheels on the front spoils the poise of the car. I have no idea what it does to the handling at high speed but I imagine the high nose may have a detrimental effect.

IMHO, this is much better, 16 front 18 rear:

but than again, some love the daughter, some the mother.......

This setup was developed by Neill Andersen for TVR and the sprint championship so that’s a good enough endorsement for me

[Bananaman99]

Hi
A bit late to the topic but
Thinking of fitting 16/18 spiders so can you let me know what off sets and tyre sizes you have
Thanks

[QBee]

To avoid rubbing you need to avoid going too wide with the front tyres, and you need to keep the overall rolling diameter right.

I would suggest 215/40 18 front and 235/40 18 rear.

I know that the rears work because they work on my Chimaera with SP12 wheels (avaiable from ACT TVR), which are 17 inch front and 18 inch rear.
My Sp12s have 17 inch fronts, on which I use 215/45 17, so 215/40 18 will work on your choice of wheels.

I have tried 225/45 17s on the front.....they caught on the back of the headlight area. So there is not a lot of room for error.

Some people do use 245 width tyres on the rears - I had catching issues on my car.

The 5 stud conversion is not cheap.


To calculate the rolling diameter of any tyre and wheel set up:

Wheel diameter is in inches, so multiply by 25.4
Tyre width is in millimetres.
The ratio of sidewall height to tyre width (the aspect ratio) is a percentage.

So 215/45 17 = 215 x 45% x 2 (height top to bottom is the wheel plus the tyre thickness top and bottom) + 17 x 25.4
Which is tyre 193.5 + wheel 431.8 = 625.3 mm

215/40 18 is 215 x 40% x 2, ie 172, plus 18 x 25.4 ie 457.2
Which is 172 + 457.2 = 629.2 mm

235/40 18 is 188 + 457.2 = 645.2 mm

If you went for 35 profile fronts:

215/35 18 is 215 x 35% x 2 = 150.5 + 457.2 = 607.7
225/35 18 is 225 x 35% x 2 = 157.5 + 457.2 = 614.7
But beware of the tyre width on the 225s causing catching.

The standard front to back rake on a TVR is 25-30 mm

Hope this helps

Standard

[mk1fan]

RichB said:

Personally I think 18" wheels on the front spoils the poise of the car. I have no idea what it does to the handling at high speed but I imagine the high nose may have a detrimental effect.

Given the overall diameter of the wheel doesn't change that much (there's 80mm less tyre diameter and 77mm more wheel diameter how is the 'poise' of the car affected? The car looks visually different but the centres of the wheels remain virtually unchanged - and the suspension 'should' be set nose down (according to my Sage). There's a bigger difference in fitting new tyres to one end only.

[RichB]

What is Sage?

[8Speed]

RichB said:

What is Sage?

[RichB]

8Speed said:

RichB said:

What is Sage?

Okay, guess it depends on who your teacher is. Anyway I'll not get involved, it was simply a passing comment of mine.
I run 17" front & 18" rears with Nitron adjustable suspension and TVR101 set it up for me. Does that make Woody my sage?

[mk1fan]

My question is a genuine one about what was meant. If it can't be articulated then fair enough.

Edited by mk1fan on Friday 28th August 18:41

[RichB]

mk1fan said:

My question is a genuine one about what was meant. If it can't be articulated then fair enough.

I appreciate that and all I can say is that the Griffs with similar sized wheels f & r never appear to sit right. Given that the space under the wheel arches is very tight I wonder if the front can be lowered much if it's on 18" rims? But, as I say, I am not the expert.When I did mine 20 years ago, it was pre-5 stud hub kits and all that, and I was helped with the ideas for my wheels, brakes and suspension by conversations with Neill Anderson, chassis designed at TVR. It worked well...

[TONYGRIFF]

So where do you get the 5 stud hubs from?

[MikeE]

RichB said:

mk1fan said:

My question is a genuine one about what was meant. If it can't be articulated then fair enough.

I appreciate that and all I can say is that the Griffs with similar sized wheels f & r never appear to sit right. Given that the space under the wheel arches is very tight I wonder if the front can be lowered much if it's on 18" rims? But, as I say, I am not the expert.When I did mine 20 years ago, it was pre-5 stud hub kits and all that, and I was helped with the ideas for my wheels, brakes and suspension by conversations with Neill Anderson, chassis designed at TVR. It worked well...

Like I said below, my car is Neill Anderson's development pre-cat griffith and he chose 16" fronts, 18" rears so I'm not going to argue with that (and as RichB says it looks better in my opinion).

People seem to be fitting 'Bola' 17" wheels to TVRs now which look very similar to Spiders but are available in 4 stud fitment avoiding the cost and effort of changing hubs

https://www.lkperformance.co.uk/wheels/bola/6128-b...