Stock brakes
Disks: 246 mm (9,7") x 11,3 / 12,7 mm (F/R
Caliper pistons: Front 49 mm (1,93") | Rear 47,5 mm (1,87")
Brake balance: Front 51,5% | Rear 48,5%
Disks
Front
To keep the stock balance, try to find new disks with equal diameters in front/rear.
VAG has nice disks with 5 x 100 mm bolt pattern and 57,1 mm center hole. These can be found from Audis, Skodas and Volkswagens.
| model | year | pattern | d | h | t | ||
|---|---|---|---|---|---|---|---|
| Wanted | - | - | 5x100 | 300-320 | 20...25 | ||
| VW | Golf IV | 01- | 5x100 | 312 | 35 | 25 | |
| BMW | E23 | 77-7/81 | 5x | 280 | 22 | 46-2860 | |
| BMW | E46 | 98-00 | 5x | 300 | 52 | 22 | D932 |
Rear
Difficulty is to find disks with large diameter but small thickness. One candidate would be BMW's E34 518 rear disks, bolt pattern 5 x 120, center hole 72,5 mm.
| model | year | pattern | d | h | t | |
|---|---|---|---|---|---|---|
| Wanted | - | - | 5x100 | 290-320 | 34-40 | 11...13 |
| BMW | E34 | 88-95 | 5x120 | 300 | 61 | 10 |
Calipers
Front calipers should have 48-51 mm (1885 mm^2) piston or two 34-35 mm pistons.
Rear calipers will be from stock 84-87 Fiero.