Pressure Alert Valve Caps. Simple but effective valve caps that constantly monitor tyre pressure and alert you of pressure loss. Each cap has a minimum pressure rating, when tyre pressure is above the minimum a green ring shows - all OK. If pressure drops below the minimum rating, a red ring shows - time to inflate and check tyres. Select the lowest PSI limit nearest to the bike manufacturer’s recommended tyre pressure. 4 versions available, supplied individually.
PSI Limit 28, PSI Range 29-30