Brake Disc Main Size, Weight And Moment Of Inertia Disc diameter T K S D3max Inertia  Moment kg m2 Weight kg 315 15 10 42 180 155 0. 116 0. 11 8.5 6. 7 355 15 10 54 200 175 0. 192 0. 178 11.4 9. 9 400 15 14 54 255 230 0. 32 0. 29 15.2 12.4 450 15 16 54 305 280 0. 55 0. 46 19.7 15.6 500 15 18 54 325 295 0. 83 0.71 25 20 560 15 18 54 350 320 1.28 1. 13 30. 7 25.6 630 15 20 54 400 360 2. 06 1.83 38.8 33 710 15 20 54 480 420 3. 32 2.9 46.5 39.4 800 15 24 70 540 500 5. 87 4.8 67.8 52.7 900 15 24 70 600 560 9.3 7.9 86.6 70.3 1000 20 30 80 620 560 17.4 15. 7 128.8 115. 1 drum gear coupling , brake wheel drum coupling , brake drum coupling , wheel drum coupling , brake gear coupling , Nylon Internal Gear Ring Coupling , Internal Gear Ring Coupling , Nylon Gear Ring Coupling , Gear Ring Coupling , Nylon Gear Coupling , drum gear coupling , Brake Gear Coupling , drum gear coupling , Disc Gear Coupling , Brake Disc Gear Coupling , ZL type elastic pin gear coupling , elastic pin gear coupling , pin gear coupling