Cannondale ATV Owner's Manual page 150

(1)
1. Cotter pin
2. Tab
148
(2)
(2)
Wheel removal / installation
1. Place the vehicle on a level surface and block the
wheels not being removed to prevent the vehicle from
rolling away unexpectedly.
2. Loosen the wheel lug nuts.
This is a photo of a front wheel.
1. Wheel lug nut (4)
2. Axle (hub) nut
3. Valve stem
3. Now, place a stable support under the vehicle frame
and raise the wheel off the ground.