3 years ago i bought a 94 sportster still had the origional tyres on it
it had 3703 miles on it when i got it so the tyres hadnt had a chance to wear out
everything was well the tyres no problems but in sunlight noticed a bit of cracking on the sidewall of the front tyre so as not to take any chances i changed the tyre
i sold that sportster in may of last year 2008 still had the origional back tyre
sunlight and sitting on concrete seem to be the larges killers of un worn tyres
so care and attention to their enviroment and regular inspection you could have years left on thoes tyres
but if in doubt change them
Brian
it had 3703 miles on it when i got it so the tyres hadnt had a chance to wear out
everything was well the tyres no problems but in sunlight noticed a bit of cracking on the sidewall of the front tyre so as not to take any chances i changed the tyre
i sold that sportster in may of last year 2008 still had the origional back tyre
sunlight and sitting on concrete seem to be the larges killers of un worn tyres
so care and attention to their enviroment and regular inspection you could have years left on thoes tyres
but if in doubt change them
Brian