Set of 20 brand new wheel bolts. These bolts are suitable for standard alloy wheels and are a great way to replace rusty old bolts, instantly uplifting the look of your vehicles wheels. These wheel bolts have a radius of 14. This is the exact radius that is fitted as standard to all Mercedes wheels that take an M14 bolt. If replacing M14 bolts for any Mercedes and keeping the standard wheels, you need to use radius 14. Not doing so will be unsafe. The diagram below explains the importance of using the correct radius. Many of the bolts you find on ebay are radius 12, you must check before purchase. Whether your wheels are radius seating depends on the manufacturer and is something you must check before purchase. Almost all aftermarket wheels are tapered, but standard .