Saris MHS 1-Bike Hitch Rack Universal Base - 1-1/4" and 2" Receiver Up to 2 Bike Standard Trays / Add-On Trays Sold Separately Black. The Saris Modular Hitch System (MHS) uses a base and hitch trays to build the rack system that fits your needs. The Modular Base works in conjunction with MHS Bike Carriers and Accessories (sold separately) to create a versatile and dependable platform rack system for all your gear hauling needs.