Author Topic: Brake Dimensions (Read 1068 times)

spastk · « **on:** September 13, 2007, 10:18:03 PM »

Front disc: (DBA #940)

Vented
246mm diameter
56mm height (wheel hub face to rear of disc )
20mm disc thickness

Rear disc: (DBA #942)

Solid
255mm diameter
45mm height
10mm disc thickness

S3's discs are similar, but nothing is close enough for a direct swap...

13btcosmo · « **Reply #1 on:** January 11, 2009, 01:06:48 AM »

Had a check of my 84 S1 and it has vented discs at the rear? I had alway thought it was strange cause there are very few car i can think of with vented rear discs.

spastk · « **Reply #2 on:** January 11, 2009, 02:34:17 AM »

Hey mate,

Sure it's a s1 cosmo? If the front indicators are in the bumper its a series-2

And yeah, I have since found there are more than one width rear brake and some are vented

Mind measuring yours? I'll measure what I have too and maybe we can work out what came with what.

13btcosmo · « **Reply #3 on:** January 11, 2009, 02:52:21 AM »

Yeah pretty sure its a series 1. Indercators not in the bumper and going by the chassis number and your spec it series 1. Will measure them for you in there near future. Bleeding the brake is on the list to do will check them then.

13btcosmo · « **Reply #4 on:** January 21, 2009, 08:57:04 AM »

Just had a measure of my rear discs.

Rear disc: Vented
255mm diameter
55mm height
18mm disc thickness.

Are your rear disc loose or are they part of the hub?

spastk · « **Reply #5 on:** January 21, 2009, 07:54:09 PM »

All IRS HB's should have discs seperate to the hubs at the rear

Robanthon · « **Reply #6 on:** September 03, 2009, 04:22:27 PM »

What`s the diffrence in brakes?
Are the Rotary cars brakes bigger then the others?
My car has vented front discs and solid rear.

Robanthon · « **Reply #7 on:** September 11, 2009, 07:24:35 PM »

Hi

My brakes are:

Front disc:
Vented
245mm diameter
55mm height
20mm disc thickness

Rear disc:
Solid
255mm diameter
45mm height
10mm disc thickness

Discs seperate to the hubs at the rear

13btcosmo · « **Reply #8 on:** September 12, 2009, 09:27:55 PM »

Its a bit strange how mazda has put bigger diameter disc on the rear than the front. Normaly other way round.

Robanthon · « **Reply #9 on:** September 13, 2009, 10:25:04 AM »

Yes it is.