Brake drum, hand brake, backwheel
| Brake drum, hand brake, back wheel | 
| Permitted rotation derivation | mm (in) | 0.08 (0.003) | 
| Inner diameter | mm (in) | 160 | 
| Brake pad minimum permitted thickness | mm
(in) | Maximum 0.5 (0.02) over rivet
head | 

 
     
		