Material: Steel C45, not hardened. Pre-bored. Sprockets with 45 teeth and more are made from grey cast iron GG25. Sprockets with 28 teeth, 30 teeth and 388 teeth have a welded hub. General dimensions: B1 = 24,1 mm, c = 4,0 mm, r3 = 38 mm. Other dimensions: See the table.
| No. of Teeth | 20 |
|---|---|
| da (mm) | 258,6 |
| d (mm) | 243,57 |
| ND (mm) | 140 |
| B (mm) | 25 |
| L (mm) | 55 |
| Weight (kg) | 11,80 |
