Rolson 12v Mini Air Compressor

For less than £10, this Rolson will do the job, albeit not as efficiently as rivals. It added 2psi to our test tyre in a minute; just check the pressures as the gauge was out. The airline was only 40cm long, but while the open cubby storage worked well, the arrangement of the wraparound lead, with a holder for the plug, meant some slack cable.