wtdafk

hi guys n girls, this is my problem as many of you may have had in the past, went for a mot, every thing fine apart from my rear tire, my bikes a 02 curvy with 4000 miles on it had 2300 when i bourght it not so long ago, thing is the fellow who wants to change my tire wants to put the same as whats on the front as the fronts still fine. these are still the orignal mezars and ive been hearing there not that good, anyway what are your experiences in mixing tires? because i cant aford a front aswell as a rear, can you reccomend anything that will go with the orignal metzar? or will i have to make do with the same on the back again (altho ive neva had any problems and managed to get the pegs to the floor with a bald rear. cheers