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Disc brakes have to be reliable. And Bosch disc brakes are even more reliable than you might expect. Thanks to the use of high-quality materials they even cope with extreme strains. Just one example: On full braking, the braking power is several times higher than the engine power. Temperatures in excess of 750°c can then arise between the pad and the brake disc. Only absolute top quality is able to withstand such extreme thermal and mechanical stress over the course of time - in other words, Bosch quality.
| Outer Diameter [mm] | 240 |
| Brake Disc Thickness [mm] | 10 |
| Minimum thickness [mm] | 8 |
| Height [mm] | 40,6 |
| Bolt Hole Circle Ø [mm] | 100 |
| Brake Disc Type | solid |
| Centering Diameter [mm] | 57 |
| Number of Holes | 4 |
| Surface | Oiled |
| Supplementary Article/Supplementary Info 2 | with bolts/screws |
| fulfils ECE standard | ECE-R90 |
| Bore Diameter up to [mm] | 14,2 |
| Designation | Rear brake disk; rear |
|---|---|
| Trade abbreviation (HKB) | BD644 |
| Standard designation | E1 90 R - 02C0100/0197 |
| Maximum mounting hole diameter | 14,200 mm |
| Contains bolts | Yes |
| Pitch circle diameter | 100,00 mm |
| Lateral runout | 30,00 µm |
| Hub diameter fit | H9 |
| Disc thickness variation (DTV) | 15,00 µm |
| Minimum brake disc thickness | 8,0 mm |
| Maximum thickness | 10,0 mm |
| Hub diameter | 57,00 mm |
| Meets manufacturer standards / specifications | ECE-R90 |
| Number of holes | 4 |
| Diameter (unpacked) | 240,00 mm |
| Height (unpacked) | 40,60 mm |
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