WELL...Rear T-30 GT has cord showing at 4k miles. Wore into a square in cross section like a dual tread might. THIS tire is off my list. Shinko Raven going on today.
You might look at the Bridgestone tire made for the BMW Goldwing looking tourer (something LT). BT020? It is a Bias tire. Very stiff side walls and good mileage. It is not the best in the rain. I bought a 160/70 for my 1100. Don't know if it comes 170/60 for the 1300.I've got 11,500 miles on my BT023's and I'm about a 1/16 above the wear bars. Might hit 14,000 miles on this set. Was thinking about moving on over to the T-30 GT's but the mileage doesn't sound that great. Damn, now which tire do I choose. I pull a trailer, so I'm a bit Leary on experimenting.
Way better then the Bridgestone 023 or the re-badged 023 that they call the T-30My mileage with the BT020-Fs are very similar to yours. It's good tire.