If these are the original tires? I'd say they need to be changed. Sounds like the rubber has dried out and starting to split. How did you ever get 60,000 miles on a set of tires, unless they are car tires.
2017 F3 Limited in Intense Red Pearl 2008 Triumph Rocket (SOLD) 2002 Honda VTX 1800 C ( SOLD) 2014 Triumph Thunderbird Commander
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