Okay, I just can't pass this up!! The 180-rear and 120-front combination is widely used in todays best machinery (Bimota YB11, FZR1000, R1, etc.). There is no doubt that not only does this combination work, but it works well. Of course, this is the BEST combination if you're into twisties, long sweepers, etc.
If you're NOT into going really fast around corners, etc., then Yamaha probably has the best set-up, which is the recommended 170-rear and 130-front. This is a well-balanced configuration for the long-haul, and the turn-in is slow, giving you all the possible maneuvering room right down to the feelers on the foot-pegs. I first rode a GTS with this (factory) combination being used, and I found the way it rode extremely relaxing, but NOT quick to steer (which I enjoy in the canyons). With the weight of the GTS being somewhat 'heavy', a rider will wear the sticky tires very rapidly (as I am finding out...). Bridgestone tires are great for the twisties, and with the base of Hwy 74 at my virtual doorstep, I get to really push the GTS hard when I occasionally ride through the tight corners of this incredible highway (Highway 74 is also called "Ortega Highway"). Also, these tires (when I dial 'out' the suspension for a softer, more compliant ride) seem to really work well with the GTS' suspension in providing a taut, but reasonably soft ride for the freeway set that I ride. I understand (through friends) that the Pirelli tires work much the same way, and that the Dunlop tires are more sporty and cannot duplicate the 'soft' feel that the other two brands can with a soft-set suspension. No, we can have thread after thread on this beloved subject, but it really does come down to how you ride; if you ride fast, do the 180 / 120. If you ride in the 'sport-tour' segment, then keep the factory-tuned 170 / 130 set-up. Both combinations work well, and your preference in riding style should dictate which combination you prefer. Sincerely, Leland "Turbo-charged GTS" Berliner
