Please check the side of the tyre to find out sizing of tyre or inner tube.
Inner tubes for all tokyobike models - please select your model from the drop down 'size' menu and contact the store if you are unsure.
650 x 23 - 25c (23/25-571) - suitable for Sport, CS (650C version) and 650c Single Speed models. 48mm long presta valve.
20 x 1 - 1 1/8 inch (28-451) for Mini Velo model. Schrader valve
16 x 1.5-1.75 inch (47-305) for little tokyobike model. Schrader valve
For more information regarding tyre and inner tube sizing, please read our post here.