Terry, Excellent - so thats the answer then thanks. btw the post to Zac was March 2001, and to Daniel July 2000, and it turns out Mick had a followup post on Daniels thread too - right on all accounts :)
Andrew On Mon, 17 Jun 2002, Terry Rudd wrote: > Andrew, > > OK, the post to Daniel would be the correct measurement as my verniers are > imperial and I remember measuring them (and I was sure that Mick was > involved in that topic....) > > 3/32" is ~2.4mm so I was a bit off with the post to Zac (chances are that it > was some time later?) > > regards > Terry > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Andrew > Greenbury > Sent: Monday, 17 June 2002 3:36 PM > To: [EMAIL PROTECTED] > Subject: RE: wheel question... > > > Terry, > > Geez you've got it all worked out havent you :) I didnt even realise > that... > > Regarding the difference between R31 and drums, neither post was > to Mick :( Snips of the posts in question are as follows. > > To Daniel: > > > A drum butts up against the axle flange and then the wheel is fitted > > so the drum acts as a spacer. A rear disc rotor is fitted the same way > > but in the case of a R31 rotor the rotor thickness is ~3/32" more than > > the standard 1600 drum and therefore it's like fitting a bigger > > spacer. > > > > --------------------- > > To Zac: > > > I can't see how the offset has got anything to do with track variances > > on the rear. There is a slight widening ~4mm from stock drums to R31 > > discs which is the difference in the thickness of the drum backing > > plate and the R31 hub. This simply pushes the wheels out +4mm each > > side and reduces the stock stud thread available by the same amount. > > > > > > Andrew, > > > > The track on a car is measured from centre wheel to centre wheel so if you > > use an inch wider wheel with the same backspace (offset is irrelevant > again) > > as the total increase in the rim width in this example is outwards for > > simplicity then the track is only widened by 1". Likewise with a hub, a > 240K > > hub is 8mm wider than a stock 1600 so the track is only widened by 8mm and > > not 16mm. > > > > You've got me on the R31 hubs, I know they are slightly wider than drums > and > > I measured them for Mick Ralph quite some time ago but I haven't kept the > > post so if one of the posts you found in the archives was from me to Mick > > then the numbers in it are correct. The track on the rear is measured in > > exactly the same way as the front, so on a 1600 it will be increased by > the > > difference of the thickness of the surfaces that the wheel bolts adjacent > > to. Take your example, i.e. the drum is 2.5mm thick and the R31 hub is 5mm > > thick then the track will increase by 2.5mm. > > > > regards > > Terry (car math is a bit tricky sometimes) > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
