I get the Pint tire bump too. My Pint is 18 months old so there is no warranty. First of all... Love my Pint. I carve and ride both directions. Almost all of the bump is on my switch side, probably because I ride that way 90% of the time and also in the 30-50degree F range during our winter. I think I was making too many tight turns with 17psi. I weigh about 250lb. I've raised the pressure and it is a little better. I am looking to get a new tire. I like the suggestion I've seen on another forum that I need to ride in the heat for a while... We'll see what happens. Almost 500 miles on the tire. Lots of turning... 67 years old and stoked.