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|   | Aero T | Summary | 
| Configuration Reference | 
| Rear Wheels | 
| ? | 
| Rear Wheel Size Compatibility | |
| Rear Wheel Size | Rear Seat Height | 
| 20" (451) | 13" - 19" (33 - 48.3 cm) | 
| 22" (501) | 14" - 20" (35.6 - 50.8 cm) | 
| 24" (540) | 15" - 20" (38.1 - 50.8 cm) | 
| 25" (559) | 15.5" - 20" (39.4 - 50.8 cm) | 
| 26" (590) | 15.5" - 20" (39.4 - 50.8 cm) | 
Measure from floor to top of seat tube at the back post. Adjusts in 0.5" (1.3 cm) increments.
| AETRSH1 | 13" (33 cm) 13 13.5" (34.3 cm) 13.5 14" (35.6 cm) 14 14.5" (36.8 cm) 14.5 15" (38.1 cm) 15 15.5" (39.4 cm) 15.5 16" (40.6 cm) 16 16.5" (41.9 cm) 16.5 17" (43.2 cm) 17 17.5" (44.5 cm) 17.5 18" (45.7 cm) 18 18.5" (47 cm) 18.5 19" (48.3 cm) 19 19.5" (49.5 cm) 19.5 20" (50.8 cm) 20 Rear Seat Height must be less than Front Seat Height with Ergonomic Seat. Rear Seat Height must be less than or equal to Front Seat Height. See Rear Wheels compatibility chart. Only 14.5"-18.5" (36.8 - 47 cm) available with Fendered Adjustable Side Guards. | STD | 
