| Spring Color | Number | RPM (heavy shoe) | RPM (light shoe) |
| Brown | NA013 | 1620 | 1800 |
| Black | NA017 | 1820 | 2100 |
| Red | NA020 | 1950 | 2450 |
| White | NA030 | 2420 | 2740 |
| Blue | NA040 | 2530 | 2960 |
| Purple | NA050 | 2575 | 3010 |
| Green | NA060 | 2975 | 3440 |
| Big Orange | NA079 | 3100 | 3660 |
| Big Brown | NA086 | 3380 | 4020 |
| Big Red | NA088 | 3530 | 4320 |
