Use M-B size for driving wheel dia 37.5cm vehicle. Use driving wheel cover of proper size. Different size cover may interrupt smooth driving and may cause accident. Not available for some car models. Depends on model, year type, grade etc., driving wheel outer dia may different, Make sure to measure outer dia. Especially M-B and S-B size have minor change frequently. Driving wheel outer dia may different. Depends on grade, thickness of driving wheel may different. In that caser, one size bigger one is required. Some driving wheel with air bag may have smaller size. Make sure to confirm size. Cover joint portion may get torn when gets strong pressure. Insert in driving wheel beforehand. In cold season, driving wheel cover rubber get hard and may be hard to install. In that case, warm driving wheel cover with dryer etc., before install.
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