[Closed] thay say downhill tyres on the side!!!!

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Urban downhill? Might have more grip on hard surfaces than big knobblies

on tarmac yes 🙂

If it wiz dry and rocky for 95 % of the course - aye

I think it's referring tot he downhill caseing, i.e. it's the same tyres as the high roller DH, just with a different tread.

Might have more grip on hard surfaces than big knobblies

No might about it - knobblies are rubbish on surfaces they don't dig into.

Street riding, ramps, jumps, street trials etc - hence double sidewalls - Maxxis Hook Worm.
From Maxxis site:

The original urban assault tire, designed to take the abuses of the most aggressive street riders. Huge air-volume softens the drops, while the inverted tread design makes rolling resistance minimal. Bead-to-bead tread provides durability and traction whether you're dropping staircases, grinding rails or riding in your local skatepark.