In article ,
MM writes:

Update: Just received my electric tyre pump (Ring Automotive RAC610
12V Analogue Compressor) from Amazon! It works brilliantly. Highly
recommended. I plugged it into the "lighter"socket and used it with
the engine running. So much easier than the foot pump.

Next point - don't rely on the accuracy of any integral pressure
guage until you've cross-checked it with something you believe to
be accurate. I quickly wrote off a set of tyres by overinflating
them, due to the guage underreading.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]