This reminds me-- my first year of college found me riding an early 80s Mongoose MTB that I'd found abandoned. All old school suntour stuff, and no quick releases. Well, I bent an axle and didn't know it-- so every day, several times a day, my wheel would slip forward in the dropouts and the tire would grind into the frame.

Tired of being stranded, I started carrying my ratchet, 15mm socket and 15mm box wrench around in my backpack at all times. Got old pretty fast when the snow hit.