chain roller width:

0.29 mm
0.3125 in
0.34 mm
0.3750 in
0.5000 in
0.6250 in
0.7500 in
1.0000 in
1.8750 in
10 mm
11.68 mm
12 mm
17 mm
17.02 mm
19.56 mm
25.40 mm
30.99 mm
5.72 mm
6 mm
7.75 mm
8 mm
9.65 mm