Loose terrain traction-assist device for wheeled all-terrain and utility vehicles

1. A system for increasing traction of a wheeled vehicle in loose terrain, comprising:

a traction-assist device having a proximal portion configured to abut a tire of a vehicle and one or more traction features presented on an outer surface of the traction-assist device between the proximal portion and a distal portion, the traction features presented on the outer surface having an effective diameter relative to an axis of the tire that is less than an overall diameter of the tire, the traction features retained at least partly by the proximal portion abutting the tire of the vehicle; and

structure within an inner portion of the traction assist device adapted to enable releasable coupling of the traction-assist device to a wheel hub of the vehicle,

wherein at least the one or more traction features are configured to engage with terrain during operation of the vehicle in loose terrain and to not engage with terrain during operation of the vehicle on normal terrain.

2. The system of claim 1 , wherein the proximal portion of the traction-assist device is configured to partially laterally compress an adjacent portion of a sidewall of the tire of the vehicle when the device is coupled to the wheel assembly.

3. The system of claim 1 , wherein the one or more traction features are selectively removable.

4. The system of claim 1 , further comprising a flotation insert configured to be removably coupled to and removable from the traction-assist device without removing the device from the vehicle.

5. The system of claim 1 , wherein the diameter of the proximal portion of the frusto-conical structure is greater than a diameter of a wheel hub of the wheel assembly and is at least 75% of the overall diameter of the tire.

6. The system of claim 1 , wherein the system has a weight that is less than half the weight of the wheel assembly.

7. A loose terrain traction assist device for wheeled vehicles, comprising:

a generally frusto-conical structure having:

a proximal portion with a diameter smaller than an overall diameter of a tire of a vehicle;

a distal portion configured to extend outwardly from the tire;

an outer surface defined between the proximal portion and the distal portion; and

an outboard cavity extending generally between the distal portion and a mounting portion; and

an inboard cavity situated underneath the outer surface;

a plurality of traction features coupled to the outer surface of the generally frusto-conical structure, the plurality of traction features configured to be retained at least in part by the frust-conical structure being positioned against the tire;

an outboard flotation insert adapted to be removably coupled in the outboard cavity;

an inboard flotation insert positioned within the inboard cavity;

an annular spacer operably positionable between the frusto-conical structure and the wheel assembly, the annular spacer having a substantially constant outer diameter that is less than an overall diameter of the tire; and

attachment means for releasably coupling the frusto-conical structure to a wheel assembly of the vehicle such that the mounting portion is proximate the wheel assembly,

such that at least part of the frusto-conical structure or part of the annular spacer is adapted to engage with terrain during operation of the vehicle in loose terrain and to not engage with terrain during operation of the vehicle on normal terrain.