These big fast fits are totally untrustworthy, I have had far too many occasions where there work or quotes have come under question and been proven wrong / bad ie parts required that are fully serviceable, wrong parts fitted, poor workmanship and my biggest bug bear..... Nitrogen Tyre inflation.....

For those that don't know the air we breath is 79% nitrogen, 20% Oxygen and 1% miscellaneous gases helium, argon etc To inflate a Tyre with pure nitrogen correctly it needs to be done one of two ways either in a vacuum chamber or vacuumed out fully first, crushing the Tyre and damaging the Tyre structure beyond repair otherwise you cannot get all the oxygen out and cannot do a pure fill. therefore simply filling a Tyre to 2-3 bar / 29.4-44.1 psi above atmospheric pressure with nitrogen will only increase the nitrogen content by around 10% the rest being oxygen and impurities so in effect you are paying around £5 for 5 psi of nitrogen which is totally ineffective.

Hows that for a rip off !!