While we have a spare (thanks Bob!) we don't carry it. We carry a plug kit and a compressor. in 60K on that trailer, once picked up a nail in ABQ. Had a tire shop a block away, aired it up, went there, they patched it. We Made it home, replaced it. These exact tires can be purchased at Discount tire for 35 each. Every few years, replace them! The amount of room the spare takes up is crazy! Of course, the spare is NOT the same as any other tire on the thing! Hey BRP, would it have been too much trouble to have the front tires on the bike match the trailer tires? Wheel and all? Just a thought - then, if a flat happens in the middle of no where, a spare might be of some use! :banghead: