I have been delighted with the comfort and wear rate on my 2008 BMW 320D Touring 17 inch runflats. However, following replacement I experienced low-pressure warnings, which, on checking all four tyres, indicated repeated pressure loss on the same wheel. Taking the car back to the tyre supplier they immediately responded thoroughly checking the rim and discovered air loss through a hardly visible pin hole in the inside central area of the rim. Without question they admitted responsibility and ordered a new BMW matching wheel that was fitted three days later at no cost to me.

On inspection their fears were confirmed by impact damage on the inner surface of the wheel caused by the spade-edged device used to break the seal between tyre and rim. They told me that although this device is placed between the tyre bead and the rim on conventional tyres, on runflats it should be positioned half way up the sidewall to avoid impact damage when the seal is broken. I cannot be the only person that has experienced this and fortunately was fully supported by excellent customer service from ATS of Bridport, Dorset.