- At least 12 ½ inches running along the seat tube from the top of the bottom bracket to the bottom of the top tube
- Tubing size from 1 inch to 1 ¼ inch on both the seat tube and the down tube.
- Plus or minus 70 degrees above the bottom bracket between the down tube and the seat tube.
- Thirty-six spokes on the rear wheel.
- The “Q-Factor” (inner distance between the pedals) needs to be greater than 4 ½ inches in width to clear the 4 ½ inch wide motor.