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Motorcycle rubber products problems

Like many, I'm extremely disappointed with the quality of rubber components supplied to our interest. From inner tubes - some with well known names on them - that are clearly porous and deflate, to handlebar grips that crack and break up in a couple of years, fork gaiters that last at best two to three years before cracking, the list goes on and on.

I am intrigued as to why this situation has been allowed to develop. I have rubber components in my possession which are old and show no signs of deterioration and wheels with Dunlop Airseal tubes which lose no more than a pound or two over the winter lay-off. I have Dunlop beaded edge tyres which are 40 years old and crack