Built for XS to XL mountain bikes, fat tire bikes, and many traditional-geometry E-Bikes, the ZEAL Pro Mountain Bike & Fat Tire Bike Cover protects your bike while it travels on common rear rack styles, including tray-based, trunk mount / post-mast, and front wheel / fork hanging racks. Each cover is designed to work on all the standard rack types similar to those shown. Patented pass-through engineering allows standard rack securing mechanisms to connect through the bike/cover setup, while waterproof materials and rubberized backing help shield your bike from weather, road spray, and paint abrasion. Each cover includes pockets for the ZEAL Pro Light Kit, sold separately. Note: ZEAL Pro Bike Covers are not recommended for roof racks.