general specifications:
55L/45C
8s*8s/42*38 11s*11s/51*47
15s*15s/54*52 20s*20s/60*58...
55L/45R
10s*10s/44*38 15s*15s/54*52
20s*20s/60*58 ...
100%L
9s*9s/42*43 14s*14s/ 50*54
17s*17s/52*53 21s*21s/52*53...