I just got a small FOX kart that has 145/70-6 tires on it. They are bald. I found some 13x5.00-6 tires really cheap and I was wondering if they would fit my rims? Tire sizing is silly. Thanks.
According to proper metric sizing convention, your existing tires should be nearly 20" tall! Obviously they are not. They are probably somewhere between 13-14" tall- in which case, you'll be fine with the 13x5-6