wheel question.
Discussion
Hello,
I understand 9" CSR rims will fit an S3/SV, can anyone tell me where the extra inch is? Is it on the outer rim?
Or is there room to go inboard a tad?
Could anyone give me a backdepth measurement, or an offset?
Or if anyone has some 8.5 MB rims, maybe tell me if there is any clearance left at the back of the tyre.
In fact anything! I'm in the dark here. But I think I'm getting to the end of my wheel nightmare!
TIA,
Mick.
I understand 9" CSR rims will fit an S3/SV, can anyone tell me where the extra inch is? Is it on the outer rim?
Or is there room to go inboard a tad?
Could anyone give me a backdepth measurement, or an offset?
Or if anyone has some 8.5 MB rims, maybe tell me if there is any clearance left at the back of the tyre.
In fact anything! I'm in the dark here. But I think I'm getting to the end of my wheel nightmare!
TIA,
Mick.
My 8.5's are ET -28, and the 10's i use are -7 but on wider arches.
Using this:
http://www.1010tires.com/wheeloffsetcalculator.asp
A 9 inch rim with a -34 should give you the same inner clearance, and push out the rim by 12mm.
The problem we had with the rims was when the rear suspension was under compression the inner lip of the arch catches the tyre wall, so you can get back to basics with a load of rough sand paper, or reduce it with more care in the garage with grinder/ jigsaw/ hacksaw/ laser beam.
I might be wrong in which case disregard this drivle.
Using this:
http://www.1010tires.com/wheeloffsetcalculator.asp
A 9 inch rim with a -34 should give you the same inner clearance, and push out the rim by 12mm.
The problem we had with the rims was when the rear suspension was under compression the inner lip of the arch catches the tyre wall, so you can get back to basics with a load of rough sand paper, or reduce it with more care in the garage with grinder/ jigsaw/ hacksaw/ laser beam.
I might be wrong in which case disregard this drivle.
Hi Mick this may be not particularly use full to you but I thrash on any way , 2years ago we spent 14 days in Sri Lanka, on the way to our hotel [60/70 miles ]virtually every town[8/10] had at least one alloy wheel outlet.Making enquiries I was told that these shops would make any style ,width ,in/out set pattern you ask for as well as dia I didn't get chance to actually visit a shop but the guy we used for taxi,s gave me the info ,I'm going to get in touch with him and see if I can get any more info ,hope this is of interest-----one eye
Hi Mick, thanks for your reply. All sorted now, I think.
I spent some time in Sri Lanka, (sailed there) and made the mistake of getting into a Tuk Tuk!
Bloody Hell! Apparently they're not bothered about dying. "God's will" and all that......
Sam, thanks for taking the time to put it all down, but, that doesn't sound right, surely it's a positive offset?
Can anyone confirm I can get 5.5 inch back depth from the wheel mounting face?
If I can get this I'm made, as I've managed to reduce my kingpin offset on the front by getting an extra inch inboard, (5.5 inch back depth) and I can carry a spare front wheel that will also fit on the rear.
I spent some time in Sri Lanka, (sailed there) and made the mistake of getting into a Tuk Tuk!
Bloody Hell! Apparently they're not bothered about dying. "God's will" and all that......
Sam, thanks for taking the time to put it all down, but, that doesn't sound right, surely it's a positive offset?
Can anyone confirm I can get 5.5 inch back depth from the wheel mounting face?
If I can get this I'm made, as I've managed to reduce my kingpin offset on the front by getting an extra inch inboard, (5.5 inch back depth) and I can carry a spare front wheel that will also fit on the rear.
Edited by mickrick on Tuesday 10th May 19:22
Yes i think your right, was written under the influence! but following:
Compomotive order:
Caterham
Front X2 CXR1380 8x13 et-8 . pcd 4x108 . c.bore 63.5 . black finish no cap
Rear X2 CXR1310 10x13 et-7. Pcd 4x108 . c/bore 63.5 . black finish no cap
So if you reverse engineer and go on the inner clearance of the 10's which are -7 and tight, the equivilent 9 would have a ET+6 and a outer clearance of 26mm less which is an inch or around about.
Compomotive order:
Caterham
Front X2 CXR1380 8x13 et-8 . pcd 4x108 . c.bore 63.5 . black finish no cap
Rear X2 CXR1310 10x13 et-7. Pcd 4x108 . c/bore 63.5 . black finish no cap
So if you reverse engineer and go on the inner clearance of the 10's which are -7 and tight, the equivilent 9 would have a ET+6 and a outer clearance of 26mm less which is an inch or around about.
Mickrick,
Sean told me that you were asking a question about Caterham CSR rear wheels on an S3 Caterham,so I signed up on Pistonheads.
Yes, the 15-inch rear CSR wheel will fit on a 2007 S3 with Watts-link rear suspension. The wheel even fits within the Caterham stock c/f rear wing. Apparently the CC factory says this isn't possible, but I have no idea what they're basing that advice on.
I am using a 5mm spacer on the rear wheels, but it is really not absolutely needed for clearance. However, since my wheel studs were long enough to allow the spacer and still get full grip on the wheel nuts, I'm running the spacers.
I drove my Caterham with this setup on a 6,100-mile trip from Colorado USA to Alaska last August, and had no problems -- at least none related to wheel choice.
Hope this helps.
Alaskossie
Sean told me that you were asking a question about Caterham CSR rear wheels on an S3 Caterham,so I signed up on Pistonheads.
Yes, the 15-inch rear CSR wheel will fit on a 2007 S3 with Watts-link rear suspension. The wheel even fits within the Caterham stock c/f rear wing. Apparently the CC factory says this isn't possible, but I have no idea what they're basing that advice on.
I am using a 5mm spacer on the rear wheels, but it is really not absolutely needed for clearance. However, since my wheel studs were long enough to allow the spacer and still get full grip on the wheel nuts, I'm running the spacers.
I drove my Caterham with this setup on a 6,100-mile trip from Colorado USA to Alaska last August, and had no problems -- at least none related to wheel choice.
Hope this helps.
Alaskossie
Hi Alaskossie, thanks for going to the trouble of signing up to reply to my post! 
My car is a also 2007 with watts link (Imperial) but an SV, which I don't think makes any difference, but I'm wondering what the back depth is on the wheel.
Have Caterham stuck the extra inch on the outer, inner, or both sides.
I don't have the driveshafts for my car yet, so can't check clearance.
I'm trying to ascertain if I have 5 1/2" clearance from the wheel mounting face.
Sam's post was also very helpfull, inasmuch as I now know there is at least 5 1/4".
I wonder if I can squeeze another 1/4" and still have clearance.
I'm not worried about the tyre as I know the section will not be wider than the rim.
I suppose the sensible answer would be to wait untill I have the rear suspension all buttoned up. But I've been trying to find the right wheel, and not getting a very good response from suppliers/manufacturers, but now I'm on a roll, have found a rim that will package my brakes, and want to get it sorted.
ETA, I'm fitting 13" rims, but the tyre dia. is more or les the same as the 15's.
Thanks again for the replies.
Mick.
My car is a also 2007 with watts link (Imperial) but an SV, which I don't think makes any difference, but I'm wondering what the back depth is on the wheel.
Have Caterham stuck the extra inch on the outer, inner, or both sides.
I don't have the driveshafts for my car yet, so can't check clearance.
I'm trying to ascertain if I have 5 1/2" clearance from the wheel mounting face.
Sam's post was also very helpfull, inasmuch as I now know there is at least 5 1/4".
I wonder if I can squeeze another 1/4" and still have clearance.
I'm not worried about the tyre as I know the section will not be wider than the rim.
I suppose the sensible answer would be to wait untill I have the rear suspension all buttoned up. But I've been trying to find the right wheel, and not getting a very good response from suppliers/manufacturers, but now I'm on a roll, have found a rim that will package my brakes, and want to get it sorted.
ETA, I'm fitting 13" rims, but the tyre dia. is more or les the same as the 15's.
Thanks again for the replies.
Mick.
Edited by mickrick on Thursday 12th May 22:01
I just measured the wheel clearance of my 10's/ ET -7, also checked on hub face stamp.....8.5s are away but going on the previous ET's to obtain one for a 9x13:
14mm from the inner rim to the rear upper ear bolt(or a segment of this bolt where it would hit), so you have 13mm or as close to 14mm as you wish left on a ET of +6/ 13" rim.
14mm from the inner rim to the rear upper ear bolt(or a segment of this bolt where it would hit), so you have 13mm or as close to 14mm as you wish left on a ET of +6/ 13" rim.
mickrick said:
Hi Mick, thanks for your reply. All sorted now, I think.
I spent some time in Sri Lanka, (sailed there) and made the mistake of getting into a Tuk Tuk!
Bloody Hell! Apparently they're not bothered about dying. "God's will" and all that......
Sam, thanks for taking the time to put it all down, but, that doesn't sound right, surely it's a positive offset?
Can anyone confirm I can get 5.5 inch back depth from the wheel mounting face?
If I can get this I'm made, as I've managed to reduce my kingpin offset on the front by getting an extra inch inboard, (5.5 inch back depth) and I can carry a spare front wheel that will also fit on the rear.
Hi mick yes the tuc tuc bit is billiant ,we were 3 couples so 3 tuc tuc's 3 abreast every where !!!,would love to go back again
I spent some time in Sri Lanka, (sailed there) and made the mistake of getting into a Tuk Tuk!
Bloody Hell! Apparently they're not bothered about dying. "God's will" and all that......
Sam, thanks for taking the time to put it all down, but, that doesn't sound right, surely it's a positive offset?
Can anyone confirm I can get 5.5 inch back depth from the wheel mounting face?
If I can get this I'm made, as I've managed to reduce my kingpin offset on the front by getting an extra inch inboard, (5.5 inch back depth) and I can carry a spare front wheel that will also fit on the rear.
Hi mick yes the tuc tuc bit is billiant ,we were 3 couples so 3 tuc tuc's 3 abreast every where !!!,would love to go back again
Edited by mickrick on Tuesday 10th May 19:22
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