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One of the biggest users (and spruikers) of run-flats – BMW – is changing back to conventional tyres on some of its models.
BMW will later this year switch to normal tyres on popular variants of its Mini for international markets.
For Australian Minis, the standard 15-inch wheel will continue to be fitted with a conventional tyre. The larger 16-inch wheel, currently shod with run-flat rubber and selected by more than 90 percent of buyers, will also change to a conventional tyre. Run-flat rubber will now be offered as a $200 option.
The 17-inch wheel will remain with run-flats.
Models with conventional tyres will come with BMW's mobility pack, consisting of an air compressor and glue kit to make temporary puncture repairs.
The move appears to be a cost saving measure by Mini's parent as the world-wide economic crisis hits home. Sources within Mini in Germany say BMW, which has been promoting the virtues of run-flats for years, has been disappointed that rival manufacturers Mercedes-Benz and Audi had not adopted the technology. Their added volume would have reduced the production cost of the controversial tyre for the motoring industry.
Run-flats are essentially a tyre with stiffer sidewalls which allows the car to be driven if the tyre is punctured. They have been widely criticised for their harsh and unforgiving ride, especially if combined with sports suspension set ups.
The lack of a spare wheel however offers substantial weight savings and wins back extra boot space.
At this stage the switch back to conventional tyres has not affected BMW models, sold in Australia, most of which use run-flat tyres.
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