the_big_1
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| posted on 20/9/16 at 05:50 PM |
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Rear Brake Disc Measurements
Hi Guys,
I have a Sierra rear diff, hubs carriers etc. and calipers.
I have modled them up and the disc measurements I find online dont match up?
The disc to me looks like it should be approx 58mm from wheel face to outer disc face.
An inside diameter of approx 148mm.
Most I find are 33mm x from wheel face to outer disc face and inside diameter of 136.
Cheers!
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loggyboy
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| posted on 20/9/16 at 06:32 PM |
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Spec should be same for all solid disc rears.
Brake Disc Thickness [mm]10,3
Brake Disc Type Solid
Centering Diameter [mm]63,5
Diameter [mm]253
Height [mm]33,2
Hole Arrangement / Number04/04
Minimum Thickness [mm]8,9
Pitch Circle Ø [mm]108
Have you mixed hubs/carriers/driveshafts from different sierras?
[Edited on 20-9-16 by loggyboy]
Mistral Motorsport
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mcerd1
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| posted on 20/9/16 at 07:02 PM |
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I assume were talking about all standard sierra rea disc parts (is not one of the aftermarket drum to disc conversions that use fiesta discs or
similar)
33mm high sounds right for a std sierra disc, see here:
http://brakeparts.co.uk/#!/shop/FORD/SIERRA/85-88/SIERRA%202.8%20V6%20XR4X4/Rear%20-%20Brake%20Discs%20and%20Drums/BDS4351X
but I can check most sizes tomorrow if you like
case how wide is the gap in the caliper carriers ?
Would it fit a 10mm disc with a little clearance or is it much wider than that ?
these are the solid disc type:
 
carriers all nice an clean :)
and if your mixing and matching brakes / hubs you might want to check you've got the hub carriers with the right lugs too:
http://www.locostbuilders.co.uk/viewthread.php?tid=163358
if that doesn't match you may find you've not got a standard sierra axle...
if you've got any pictures it would help us a lot 
[Edited on 20/9/2016 by mcerd1]
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the_big_1
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| posted on 21/9/16 at 11:36 AM |
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Hi Guys,
I solved it! The issue was the caliper model I had didn't have the correct lug length and was bringing the caliper 19 mm to far forward.
All fits now!
Cheers!
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