We’re so confident in the performance of the Bontrager tire line that we’re backing it with a guarantee unsurpassed in the bike tire business. All aftermarket Bontrager tires are unconditionally satisfaction guaranteed for 30 days from the date of purchase. If you - for any reason - don’t like your new Bontrager tire, return it (along with your original sales receipt) back to the place of purchase within 30 days of purchase date for full refund or exchange. It’s that easy.