A wheelchair system and an accessory system for a wheelchair are disclosed. According to one embodiment, the accessory system may include an accessory frame having one or more interface elements to mount to a wheelchair frame. The accessory system may include a wheel assembly rotatably coupled to the accessory frame by a first fastener. The accessory system may include an engagement system further coupling the accessory frame to the wheel assembly. The engagement system may include a channel guide member defining a channel having a notched region. The channel guide member may be rotatably coupled to one of the accessory frame or wheel assembly by a second fastener. The engagement system may further include a translating member retained within the channel of the channel guide member. The translating member may be fixed to another one of the accessory frame or wheel assembly.