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Date: Sat, 14 Jan 2006 12:29:24 GMT
From: Johannes <johsnospamam-sizefitter.com>
Subject: Re: New tyres fitted to rear?


Al wrote: > > Johannes H Andersen wrote: > > Al wrote: > > > > > > Just had two new tyres fitted to my 1987 900 Aero. > > > > > > Costco insisted that the new tyres were fitted to the rear not the front, > > > apparently they have been told by Michelin not to carry out customers wishes > > > and fit newer tyres to the front. They were playing a "police" video which > > > demonstrated the "problem" i.e. more grip on the new front tyres leads to > > > the car oversteer and skidding/spinning. > > > > I have heard this explanation, but it is also a bit of a mystery to me. > > If braking in the wet depends on thread depth, then you get the shortest > > braking distance when the new tyres are fitted at the front. The instability > > problem must be an extreme case with worn out rear tyres and a very front > > heavy car. > > > > In practical terms, new tyres are always better than old tyres; they degrade > > in a linear fashion from 8mm and down to 1.6mm or whatever. Since we can't > > afford to change tyres as often as a F1 racing team, we must adjust our > > driving to the current state the tyres. > > Johannes thankyou! I think your first paragraph explains my thinking > far better than I did. I have long suspected that this was some kind of ploy by tyre dealers. If you fit new tyres on the rear, chances are that you will come back sooner for new front tyres. This of course evens out such that the combined tyre wear is no different. However, the shorter gap after fitting the rear tyres makes it more likely that you will remember where you got the tyres from. But can they really be that crafty? > Laura I'm in full agreement on both of your points, i.e. not using > Firestones and needing that coffee! > > Al I have Firestones Firehawk TZ200, W rated on my 9000. No complaints, but it may be possible that you can't W tyres rated in the US?

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