Primo Comet 20 x 1 3/8" (37x451) 85psi tire

The largest 451 tire that will fit through Shimano dual pivot brakes. A good touring tire for the 451 user who values comfort over speed. Bike Friday bikes can be built with either 451 and 406mm rims. Both sizes can be referred to as 20" wheels, when the 451 is a larger rim. Confirm you have a 451 or a 406 before ordering by looking on the side of your current tire to confirm the rim diameter.