| name | ratio / crank | weight | bearings | capacity | year country |
|---|---|---|---|---|---|
| 1550 X (discontinued) | 5.2:1 27"/pc | 11.6oz | 3+1 | 0.20/130m | |
| 2050 X (discontinued) | 5.2:1 29"/pc | 11.8oz | 3+1 | 0.25/110m | |
| 2550 X (discontinued) | 5.2:1 32"/pc | 12.3oz | 3+1 | 0.25/150m | |
| 3050 X (discontinued) | 5.2:1 33"/pc | 12.5oz | 3+1 | 0.28/180m |