lm in the process of buying a 06 1100 V star classic , right price from a mate but it needs new tyres and l wanted to know how big a tyre will fit on the rear of one of these bikes , the reason is :- 1/ to fill out the rear guard (the 170 looks awefully small inside the guard) and 2/ being taller/bigger , it should show less revs on the highway which is where it will spend a lot of time at 100kph + , l used the search and nothing came up , thanks in advance .