Spiders on the Cerb

[Killer Rhubarb]

What size tyres should be on the 18's?

I picked up a mint set of anthracites and they appear to have 255's all round. There is a bit of rubbing on full lock, so I'm assuming they should be 235's front? Looks good though...

[high52kojak]

Normally 225 on the fronts, 255 on the rear

[5MUG]

They look great - think I'd like those for mine when I get one.

[Killer Rhubarb]

225/40? ta

[high52kojak]

It depends on the tyre you want, I have 888's all round and use 225 40 18 on the front as thats what was recommended. 225 35 are fine though.

[Gazzab]

Are they all 'front' spiders. I assume not. So you may well have the wrong wheels for the back and the wrong tyres from the front. Although some cerbs can get away with rear spiders.

[Killer Rhubarb]

Gazzab said:

Are they all 'front' spiders. I assume not. So you may well have the wrong wheels for the back and the wrong tyres from the front. Although some cerbs can get away with rear spiders.

To be honest Im not sure, they were off a saggy? I just got them thrown on, only realised a day after they were too wide on the front

[FUBAR]

high52kojak said:

It depends on the tyre you want, I have 888's all round and use 225 40 18 on the front as thats what was recommended. 225 35 are fine though.

Ive just had the same put on. Had to have the wheel arches ground out to stop (most of) the rubbing. Same with yours?

[high52kojak]

No they don't rub at all, they are quite close but they are fine.

[Gazzab]

Killer Rhubarb said:

Gazzab said:

Are they all 'front' spiders. I assume not. So you may well have the wrong wheels for the back and the wrong tyres from the front. Although some cerbs can get away with rear spiders.

To be honest Im not sure, they were off a saggy? I just got them thrown on, only realised a day after they were too wide on the front

then they are not a set of four fronts. You may have issues at the rear as well as the front.

[Killer Rhubarb]

Gazzab said:

Killer Rhubarb said:

Gazzab said:

Are they all 'front' spiders. I assume not. So you may well have the wrong wheels for the back and the wrong tyres from the front. Although some cerbs can get away with rear spiders.

To be honest Im not sure, they were off a saggy? I just got them thrown on, only realised a day after they were too wide on the front

then they are not a set of four fronts. You may have issues at the rear as well as the front.

With rubbing?

[Gazzab]

I am not sure what issues it causes ie whether it is rubbing (or not, if you get away with it) or whether it is an offset issue. I am sure others will know better than me.

[Gazzab]

Few other things:-
You want 255 35 18 on rear and 225 35 18 on the front. You can get away with 40s sometimes or even 235 35 on the front.
You will need stop locks on the front to stop the inside edge of the wheel rubbing on the wishbones. These are chamfered (sp?) edged plastic things that go on the steering rack to limit the turning circle slightly.

[ro_butler]

Gazzab said:

I am not sure what issues it causes ie whether it is rubbing (or not, if you get away with it) or whether it is an offset issue. I am sure others will know better than me.

It's an offset issue. The 'fronts' are ET 42 but the 'rears' are ET35. Both fronts and rears are 8.5" wide. The main thing this causes is rubbing. The higher offset (fronts) are less likely to rub on the rear arches. Having said that I got away with it. Since fitted SP12's which are miles better.

Edited by ro_butler on Tuesday 22 June 01:18

[Killer Rhubarb]

Gazzab said:

Few other things:-
You want 255 35 18 on rear and 225 35 18 on the front. You can get away with 40s sometimes or even 235 35 on the front.
You will need stop locks on the front to stop the inside edge of the wheel rubbing on the wishbones. These are chamfered (sp?) edged plastic things that go on the steering rack to limit the turning circle slightly.

SP automotive to get the locks? Thanks mate

[Gazzab]

Racing Green and other TVR parts suppliers sell them I'm sure.

[JR]

Killer Rhubarb said:

Gazzab said:

Few other things:-
You want 255 35 18 on rear and 225 35 18 on the front. You can get away with 40s sometimes or even 235 35 on the front.
You will need stop locks on the front to stop the inside edge of the wheel rubbing on the wishbones. These are chamfered (sp?) edged plastic things that go on the steering rack to limit the turning circle slightly.

SP automotive to get the locks? Thanks mate

(sp?) was for spelling although SilverstoneP may well sell them. You'd best check all of the wheel widths and offsets before deciding which way round to put them on your car and which tyres, wheel spacers and stop locks to buy.

[Mr Completely]

Ummmm, sorry to add to this so far down the line but you do know that the wheels have the giveaway stamps "front" and "rear" on the inside of the bosses should you have any doubts.......



and, as you can see, my sets have a 33mm offset on the rear.

Hope that's not too late to help.

[JR]

Mr Completely said:

Ummmm, sorry to add to this so far down the line but you do know that the wheels have the giveaway stamps "front" and "rear" on the inside of the bosses should you have any doubts.......



and, as you can see, my sets have a 33mm offset on the rear.

Hope that's not too late to help.

Hi, I've measured a set of RL 17s off the car: the offset isn't stamped on the inside and all of the wheels have both the same rim width and the same offset.
They are 8J x 17 with a 41mm offset (calculated by measuring the overall width of the wheel, 9", and subtracting half of that from the distance from the outside of the rim to the hub face, 6 and 1/8th", giving 1 and 5/8", or 41mm.) The PCD is the traditional english 4.5" or 114.3mm. So with the wider rim you may well need spacers whatever the offset.

[Gazzab]

JR said:

You'd best check all of the wheel widths and offsets before deciding which way round to put them on your car and which tyres, wheel spacers and stop locks to buy.

YOU just need to put those wheels stamped 'front' at the front. You will need the right tyres (per earlier post) and you will need stop locks.
On the rear you will either need a set of 'fronts' OR you might be lucky and get the rears to fit or you might need to grind or possibly you will need to find some 'fronts'.