laraza
Turbocharged
Please allow me to butt in.
The 55 aspect ratio does indeed make a good difference in handling, but tis just part of the story.
Likely in attempt to help new riders in park lots and at low speed, the Roadster was created with a reverse daigo. The result is the rear axle is .5 inch lower than the front. This is not condusive to good corner handling.
The 240/R5516 raises the rear axle to level with the front. This improves handling; however, reducing the circumference of the front can lower the front axle .5 inch below the rear and seriously improve handling!
A 140/78R17 or even better, the Michelin Road5 in 150/70R17 will greatly improve handling.
Totally unaware of this, and, as always, thanks for the info, one question, does this also apply to the Classic? thought all the bikes were the same frame and geometry?