The topeak smart gauge d2 is a second generation digital gauge features a rotating smarthead and works seamlessly with presta and schrader valves without changing parts the precision digital gauge reads up to 250 psi 17 bar and is designed for use with tires suspension forks and rear shock units lcd display can be programmed to show pressure in psi bar or kgcm2 topeak smart gauge d2 features smartheadtm connector fits automatically to presta or schrader valves ro