Tony Posted September 16, 2011 Report Share Posted September 16, 2011 I think there is Once again a BMW 3 series on RFT's, geo is as suggested by BMW and yet this tyre wear. They claim neglecting tyre pressures is a reason for the tyre wear and yet the cars have pressure monitors I've said it before and i'll shout it again now.... The RFT' tyre cannot deform to the BMW 3 series sport camber positions "FACT". Quote Link to comment Share on other sites More sharing options...
BuyPirelli Posted September 18, 2011 Report Share Posted September 18, 2011 Interesting. How often do you see this? Quote Link to comment Share on other sites More sharing options...
tunnie Posted September 18, 2011 Report Share Posted September 18, 2011 I think there is Once again a BMW 3 series on RFT's, geo is as suggested by BMW and yet this tyre wear. They claim neglecting tyre pressures is a reason for the tyre wear and yet the cars have pressure monitors I've said it before and i'll shout it again now.... The RFT' tyre cannot deform to the BMW 3 series sport camber positions "FACT". Lots of tread left there too. Not taken long to do that! As I understand it legal tread needs to cover at least 2/3's of the tyre? So they would still be legal? Quote Link to comment Share on other sites More sharing options...
CIH Posted September 18, 2011 Report Share Posted September 18, 2011 Interesting. How often do you see this? all the time. I think there is Once again a BMW 3 series on RFT's, geo is as suggested by BMW and yet this tyre wear. They claim neglecting tyre pressures is a reason for the tyre wear and yet the cars have pressure monitors I've said it before and i'll shout it again now.... The RFT' tyre cannot deform to the BMW 3 series sport camber positions "FACT". Lots of tread left there too. Not taken long to do that! As I understand it legal tread needs to cover at least 2/3's of the tyre? So they would still be legal? Probably as there's no cord showing but they would have made an apearance soon enough plus the carcas has clealy collapsed. Quote Link to comment Share on other sites More sharing options...
adam_r Posted September 19, 2011 Report Share Posted September 19, 2011 excuse my lack of knowledge but can you help me understand this please. I know that the RFT has a stiffened side wall with an inner lip to protect the rim If the tyre deflates so it can be driven on. Since the side wayy is stiffer it cannot deform as much as a normal tyre would / could so this transfers a lot of the load of the car on to the corner between side wall and main face of the tyre.... what i dont understand is how the wear patch can be so thin and so drastic compared to the rest of the trye wear. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 19, 2011 Author Report Share Posted September 19, 2011 Camber loads the tyre from the inside out ( negative camber ) the more it leans the more load. The RFT shown has -1 degree 50' of camber but unable to deform at all. Quote Link to comment Share on other sites More sharing options...
adam_r Posted September 19, 2011 Report Share Posted September 19, 2011 So i dont understand that a company like BMW have missed such an issue through the whole R&D and the fact this isnt just an isolated case of 1 or two, its quite wide spread and is destroying hundreds of pounds worth of tyres. How can they blissfully ignore this issue ? Quote Link to comment Share on other sites More sharing options...
Tony Posted September 19, 2011 Author Report Share Posted September 19, 2011 They must be aware.... Fact is the tyres are sacrificial so the handling is not impaired. We can save the tyres by dialling out camber and yes this is detrimental to the handling but from the top down. Quote Link to comment Share on other sites More sharing options...
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