Maxxis Beaver Tires. Specially designed for racing in adverse conditions, the Beaver features a tread design ideal for wet and muddy conditions. The dual compound tread utilizes a hard base layer to reduce rolling resistance and provide knob support, while the siped, softer outer layer provides unparalleled grip on wet rocks and roots. Maxxis Beaver Tires. Specially designed for racing in adverse conditions, the Beaver features a tread design ideal for wet and muddy conditions. The dual compound tread utilizes a hard base layer to reduce rolling resistance and provide knob support, while the siped, softer outer layer provides unparalleled grip on wet rocks and roots. Tread design for wet and muddy conditions Dual compound technology Adding sealants to Maxxis tires voids the warranty