Originally Posted by barry123400

Remember that most places that sell replacement belts have a book to match belts and applications up. This is just in case you find youself stuck somewhere with a broken belt someday.
It is not uncommon to carry a spare belt or belts in the trunk on older cars. Many cars I buy already have had them.
Even your old belt if kept can make an emergency spare. Takes very little room as well. It's just our cars are so old now a parts place might not have one in stock if you needed it out on the road. Saves a wait for one to arrive.