7J wheel offset on a Tuscan/Vixen

[Turbster]

Hi,

I'm wanting to order some Compomotive ML wheels for my Tuscan and the body is not back on the chassis yet, so I need to make a pretty accurate guess regarding the offset. I've tried some 10mm neg wheels on the standard uprights/hubs and they just touched the pivot bars/dampers. My new uprights have an extra 10mm offset, so the 10mm neg wheels would now be clearing by 10mm in theory, in addition to this I'm adding rear discs which will be mounted on the outer face of the hubs, so this will bring the total increase in offset from standard to 14mm...

So the question is, is anyone running 205/60/15 tyres on 7J rims (or similar)and how much clearance to a standard wheel arch?

Are 7Js possible, if not are TR6 offset 6J the way to go?

Cheers,

Paul.

[TVR_owner]

Turbster said:

Hi,

I'm wanting to order some Compomotive ML wheels for my Tuscan and the body is not back on the chassis yet, so I need to make a pretty accurate guess regarding the offset. I've tried some 10mm neg wheels on the standard uprights/hubs and they just touched the pivot bars/dampers. My new uprights have an extra 10mm offset, so the 10mm neg wheels would now be clearing by 10mm in theory, in addition to this I'm adding rear discs which will be mounted on the outer face of the hubs, so this will bring the total increase in offset from standard to 14mm...

So the question is, is anyone running 205/60/15 tyres on 7J rims (or similar)and how much clearance to a standard wheel arch?

Are 7Js possible, if not are TR6 offset 6J the way to go?

Cheers,

Paul.

Paul,
I run compo FHs on my quite stiffly sprung M race car under fairly stock rear arches. They are on 200/580R slicks. I run 7.5s and 8s at the rear (and 6.5s wet) - still on drums.

Not sure what the offsets are but can check - won't be till Crimbo though if you're in a rush....

Edited by TVR_owner on Monday 30th November 09:58

[Turbster]

This is a race car too, but I've got to run Yoko A048's, I know 205's clear on another Tuscan with 6J's but 7 is the spec for the tyre and they look a bit squeezed on 6's. Thinking about it now I've woke up... the disc will not be additional offset as it will just be in place of the drum, so it's just an extra 10mm not 14mm... Don't know what the lead time on wheels from compomotive is, revolution take a month or so, so I expect it's similar??

[heightswitch]

Turbster said:

This is a race car too, but I've got to run Yoko A048's, I know 205's clear on another Tuscan with 6J's but 7 is the spec for the tyre and they look a bit squeezed on 6's. Thinking about it now I've woke up... the disc will not be additional offset as it will just be in place of the drum, so it's just an extra 10mm not 14mm... Don't know what the lead time on wheels from compomotive is, revolution take a month or so, so I expect it's similar??

Paul. Your new uprights should have slightly more than an extra 10mm of offset depending on how you machine them up when compared to those other uprights you may have used. The biggest issue you will face however is the clearance of the lower pivot bar. There are "ways" around this in terms of your build to allow you to maximise the available space for wheel and tyre fit

Just to confuse you more though, you need to measure both sides since the left and right arches are different widths and up to 1" different dependant on where you place the tape.

Your rear end set up is also significantly different to the M that Simmo has.

You may find that Tec Del Minilight offer more options in the 15" wheel as opposed to Compomotive. They are near enough same price and can be supplied in various, you may however want to compromise and use best fit with spacers to allow front / rear wheel changes.

N.

Edited by heightswitch on Monday 30th November 11:50

[Turbster]

Just faced them off for now Neil, so it will be more then. I think I'll just have to wait until I've got the car as a rolling chassis at the end of the month and order the wheels in Jan. Would still be useful to hear what offset and sizes people are running though..

I thought the rear quarters looked different, not just my car then!!??

[Slow M]

TVR_owner said:

Turbster said:

Hi,

I'm wanting to order some Compomotive ML wheels for my Tuscan and the body is not back on the chassis yet, so I need to make a pretty accurate guess regarding the offset. I've tried some 10mm neg wheels on the standard uprights/hubs and they just touched the pivot bars/dampers. My new uprights have an extra 10mm offset, so the 10mm neg wheels would now be clearing by 10mm in theory, in addition to this I'm adding rear discs which will be mounted on the outer face of the hubs, so this will bring the total increase in offset from standard to 14mm...

So the question is, is anyone running 205/60/15 tyres on 7J rims (or similar)and how much clearance to a standard wheel arch?

Are 7Js possible, if not are TR6 offset 6J the way to go?

Cheers,

Paul.

Paul,
I run compo FHs on my quite stiffly sprung M race car under fairly stock rear arches. They are on 200/580R slicks. I run 7.5s and 8s at the rear (and 6.5s wet) - still on drums.

Not sure what the offsets are but can check - won't be till Crimbo though if you're in a rush....

Edited by TVR_owner on Monday 30th November 09:58

Not sure I understand, Are the Tuscan-Vixen/M series wheel arches the same in relation to their respective hub mounting face?
B.

[heightswitch]

Slow M said:

TVR_owner said:

Turbster said:

Hi,

I'm wanting to order some Compomotive ML wheels for my Tuscan and the body is not back on the chassis yet, so I need to make a pretty accurate guess regarding the offset. I've tried some 10mm neg wheels on the standard uprights/hubs and they just touched the pivot bars/dampers. My new uprights have an extra 10mm offset, so the 10mm neg wheels would now be clearing by 10mm in theory, in addition to this I'm adding rear discs which will be mounted on the outer face of the hubs, so this will bring the total increase in offset from standard to 14mm...

So the question is, is anyone running 205/60/15 tyres on 7J rims (or similar)and how much clearance to a standard wheel arch?

Are 7Js possible, if not are TR6 offset 6J the way to go?

Cheers,

Paul.

Paul,
I run compo FHs on my quite stiffly sprung M race car under fairly stock rear arches. They are on 200/580R slicks. I run 7.5s and 8s at the rear (and 6.5s wet) - still on drums.

Not sure what the offsets are but can check - won't be till Crimbo though if you're in a rush....

Edited by TVR_owner on Monday 30th November 09:58

Not sure I understand, Are the Tuscan-Vixen/M series wheel arches the same in relation to their respective hub mounting face?
B.

Its called the wonders of hand built fibreglass construction Bernard.
N

[Slow M]

OK Neil, now I'm even more confused. I was under the impression that both cars were wearing "fairly stock rear arches."

B.
PS How're you healing? Hope well!

[Turbster]

They are standard arches, and of course the M and Vixen are a different set up/arches, Neil's refering to the fact that the standard body moulding appears different on each side..

[Monkeythree]

Turbster said:

Hi,

I'm wanting to order some Compomotive ML wheels for my Tuscan and the body is not back on the chassis yet, so I need to make a pretty accurate guess regarding the offset. I've tried some 10mm neg wheels on the standard uprights/hubs and they just touched the pivot bars/dampers. My new uprights have an extra 10mm offset, so the 10mm neg wheels would now be clearing by 10mm in theory, in addition to this I'm adding rear discs which will be mounted on the outer face of the hubs, so this will bring the total increase in offset from standard to 14mm...

So the question is, is anyone running 205/60/15 tyres on 7J rims (or similar)and how much clearance to a standard wheel arch?

Are 7Js possible, if not are TR6 offset 6J the way to go?

Cheers,

Paul.

I have 205/60R15's on 7J rims on my Vixen and they clear the standard arches both sides. Sorry I can't remember the wheel offset but I had to use 13mm spacers at the rear to get the clearance around the lower pivots (original uprights).

[Turbster]

That's good to know, shame you can't remember the offset figure, I imagine yours would fit without spacers on mine..

[Monkeythree]

I've got a spare wheel at my lockup. I'll try and get up there at the weekend and dig it out and I'll let you know.

Tom

[TVR_owner]

Slow M said:

TVR_owner said:

Posted some confusing stuff

Not sure I understand, Are the Tuscan-Vixen/M series wheel arches the same in relation to their respective hub mounting face?
B.

Different Bernard, twas intended as a comparsion. In hindsight, not a very good one..

[Slow M]

Thanks Paul & John,
I was starting to think these cars had more in common (track width...) than I was aware of.
B.

Edited by Slow M on Tuesday 1st December 16:49