Small, independent shops often sell "take-offs"—tires with 70-90% tread left.
Great for reaching local DIYers and mechanics directly. where do they buy used tires
If you need a replacement on a budget, these are your best bets: where do they buy used tires
Inspect the inner liner for plugs or patches that might indicate a previous repair. where do they buy used tires
Facebook Marketplace and Craigslist are gold mines for individual sellers.
