20" (451mm) Sun CR-18 Double Wall Aluminum BMX Rim - 28H - Black 28.6mm This bottom bracket is designed

This bottom bracket is designed to be used with old school 1 piece cranks that are 24 tpi and frames that have a classic American bottom bracket shell

This is a 1/2"x1/8"x112L chain that resembles the classic KMC/Izumi style chain

Pressure Rating: 8-30psi

Ot is MIG welded Hi-Tensile steel construction

See additional pictures for more details

20" (451mm) Sun CR-18 Double Wall Aluminum BMX Rim - 28H - Black 28.6mm This bottom bracket is designedThe Sun CR 18 Rim is a black aluminum double wall rim w eyelets and machined sidewalls. It is has 28 holes and is drilled for a Schrader valve. This rim will work with 20 x 1 1 8 or 1 3 8 (451mm) tires only.