The street triple needs a new rear tyre and everyone on the ST/675 forums raves about Metzler Stortec M7RRs so I'm going to give them a try.

The front tyre is a Bridgestone BT023 which still has loads of life left in it

Is it sensible to mix tyres? Bearing in mine I don't ride the bike hard..I'm guessing it won't make a difference, or is it worth the extra money to change both at once (I can always keep the current front for on the daytona)