Oxford PSI Alert 30 Pressure Valve Cap, Range 29-30

Tri-colour pressure alert: indicates tyre pressure loss. Green = Optimal pressure; Yellow = Slight drop in pressure; Red = Significant drop in pressure - inflate tyre. Simple to use: unscrew existing valve cap and replace with an Oxford PSI Alert pressure valve cap. Compatibility: select the lowest PSI limit nearest to the bike manufacturer’s recommended tyre pressure. Construction: Brass material with metal pin cap. Available tyre pressure versions: 29-30, 31-34, 35-37.