My A10, M21, B31 (hillclimb bike) and the new project (A10 frame) all have Avon Speedmaster on the front. Been using them for 50yrs and wouldn't use anything else. Excellent grip and handling. Most have Dunlop K70 on the rear, except the M21 (vee twin) which wore out the K70 in 3,000 miles so I'm trying a Roadrunner Universal on the back of that. Re the B31 (always Speedmaster / K70 shod) - often had class FTD and once 2nd FTD overall (all machines on the hill) so can't understand the negative comments re those tyres.