Whatever you get on the rear, make sure you eith have a thick tube or dual ply tyres Will prevent pinches and generally take more of a beating. I've had try-all stikys, they were mint but wore out a bit too quickly, then went on to standard single ply high rollers, grip was great but pinched loads, had larsen tt's but the didn't fit frame or forks (booo) now on dual ply super tacky minions and so far so awesome! I run my tyres backwards too, gives a wee bit more grip on ledges EDIT: I have about 25/ 30 psi inboth tyres, good balance between grip and easy rolling, i weigh 11 stone