I recently squeezed an Onza sticky finger in a quax 20" profi. I found the central grey compound very slippy on smooth surfaces (ceramic quarry tiles). So fitted a Maxxis maxx daddy instead, much gripier(sp?), cheap and bouncy. The only problem are the black marks left on the kitchen floor and in my copy book:o
Thanks for tgat thread was reely helpful, i decided on getting one, as for the bouce aspect of it, i shal post a proper review wen its been through it hell!