Thanks to Kershaw Knives for sponsoring this episode of The Shop Manual. Kershaw is giving away free pocket knives and offering viewers a discount on all purchases. Woohoo!

Go to https://a.pgtb.me/W6wfPG to enter the monthly giveaway for a free pocket knife, and get 25% off your order at https://kershaw.kaiusa.com/ with code TSM25.

We all know that tires age, and that over time the rubber will harden and degrade. But do motorcycle tires really have an expiration date, and if not, how old is too old to trust a set of buns? We dispel the hearsay and explain the factors that impact how a tire ages in this episode of The Shop Manual.

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