I have one on the singlespeed and ive got it around 55/60psi.its on the rear and seems to dig down well enough for me to not have a bad word against it.maybe in some clay-like mud it would be a problem but we dont have much clay stuff up here. its fine around contin but its harsh and i
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m in the mud if it means a little more comfort.i would normally ride on something bigger.If i dont race then i dont need that advantage of never spinning on the spot and needing to dig down so its no big deal.makes things more intresting too.
remember to get a 1.5/1.75 tube for it.stuffing bigger into it can be a pain.