15 replies to this topic

[JimF]

Right then. I currently have 8.4" discs, I'm after changing to 10" wheels. Im thinking of turning my current discs down to 7.5" and using Cooper S calipers. But every kit I see comes with driveshafts and metro flanges etc. Are these just if you're going from a drum braked car? I'm happy to use 8.4" discs and turn them down each time I replace them.
So really all I need is calipers and brake fluid. Right? All the topics about this either don't cover it or don't cover it clear enough for my sunburnt northern head. I've even been googling to no avail.

[Turbo Nick]

as far as i know you need to run the proper 7.5" discs and drive flanges with the S calipers, not turned down 8.4's and flanges.

[Alex_B]

For the cost of getting the disks turned down it would probably be worth getting the 8.4" to 7.5" conversion that includes the calipers (the most expensive part you require anyway), disks, drive flanges, and associated fixings. That way you dont have the expense of turning disks down to find they dont fit after all 

[Shifty]

As far as I know you can, if you've got access to a lathe then its a fairly cheap way of doing it.

[JimF]

Getting them turned down wouldn't cost me anything. But if they don't fit it would be a waste of time. I get the impression a lot of these kits include stuff that doesn't need replacing, to cater for drum and disc models

[Shifty]

I may be wrong..

 

http://www.theminifo...ers-on-84-hubs/

[JimF]

As far as I know you can, if you've got access to a lathe then its a fairly cheap way of doing it.

Yep, I have

[JimF]

I may be wrong..
 
http://www.theminifo...ers-on-84-hubs/

Ah thanks mate. I'd done my nut in searching!

[Shifty]

Yeah, I'd always thought you could, having said that I've never tried it myself.

[Tomm]

Thinking about it right now, I can't seem to think why you couldn't do it. That said I haven't seen it done before and I'm sure if it was possible we would have seen someone do it by now.

I have a 8.4 & 7.5 disc in the garage, I will try and take a photo and note any obvious differences.

For the money I paid for my 7.5 conversion in the group buy I wouldn't be bothered to go to the effort of turning 8.4's down, and i look at a lathe every day so it's not exactly inconvenient.

[Tamworthbay]

For the cost of getting the disks turned down it would probably be worth getting the 8.4" to 7.5" conversion that includes the calipers (the most expensive part you require anyway), disks, drive flanges, and associated fixings. That way you dont have the expense of turning disks down to find they dont fit after all

Just in case anyone else thinks of doing this. It is a very simple job to do on a lathe. Any engineering shop worth mentioning it could do them in an hour tops. Most places will do simple jobs like that as 'lunch hour specials' for minimal cost. Another alternative is to pop into your local college, most of them are happy to have little extra jobs for the engineering students. Either way the cost will be way below that of replacement parts. Many cars not so well catered for in parts as minis rely on the working and reworking of parts and having a car where everything is available makes it easy to fall into the expensive trap of always buying new parts.

[Ethel]

Are you sure?  7.5's are  entirely different to allow for the inner diameter of the disc being smaller than the flange to disc mounting.

 

All Mini driveshafts are interchangeable at the outer CV end. The CV's come in disc or drum (and 7" non "S" disc) flavours. Metro flanges are used to give the correct offset for vented discs.

[Captain Mainwaring]

Having messed about with disks on a lathe before to save a pound, I wouldn't waste my time unless the existing setup was brand new.

[JimF]

Cheers for the info guys!

[Fossy313]

what the benefits of going from 8.4 to 7.5?