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@deleted
sorry to gatecrash this thread, but it's not worth starting a new one for.... I've got a bridgestone NJS HHSB etc, need to buy inner tube but don't know the wheel measurements, usually have bike with me but not today. what's the standard keirin wheel measurement i need to ask for in the shop?.... is it 700 x 23, I feel a spanner asking, but staff at evans might give me a choice.