Finally an alternative to the dugast rhino the challenge limus is here a deep widely spaced tread pattern makes this look like a serious contender for the foul weather deeper 33mm knobs for increased traction in deep mud speed and max traction all in one details use cyclocross size 28 width 33 weight 400 gr tpi 260 bead carcass super poly bar 2 6 psi 28 87