best size tire

[kfxriderirv]

wat is the best tire size for dirt riding and racing on dirt

[SRH13]

i got a 19" MXR4 on mine and love em. a 20" MX tire is not bad either.

[450r51]

18s for racing everyone knows that.

[zdog400]

i rum 18 in dry comditions and 20 in razr2 in muddy conditions