Yes i agree you do not mix and match tires whether it is the same brand or different brand. The tire that went flat had almost the same tread patternas the Avon's rear 46(could be wrong with there tire no. I repaced it with the new tire metzler replaced the old with . Took her out for a shor break in 100 miles quite alot of improve ment between the old and the new. grips better faster in the corners and tracks better. For my self I like metzler for choice of tires.