Using your Axiom Flascheguard Fender Set is easy. First, find the right position on your 27.5/70 bike. The fenders are designed to fit a wide range of bikes, so they should go on smoothly. Just attach them securely using the included hardware. When riding, these fenders will keep mud, water, and debris off you and your bike. As for maintenance, a simple rinse with water after a dirty ride is usually enough. Avoid using harsh chemicals that could damage the recycled materials. Check the fenders and the stainless - steel stays regularly for any signs of wear or looseness. If you notice anything, tighten the parts or make small adjustments. By taking good care of your fenders, you'll ensure they keep working well for a long time.