The Saris MTR 1 Bike Add-on is a hitch bike rack that lets you upgrade your non-folding/tilting SuperClamp hitch rack, or convert your SuperClamp 4-bike to a 2-bike. It’s Universal tilting base is compatible with all SuperClamp hitch racks and it works with 1-1/4″” and 2″” receivers. With the Saris MTR 1 Bike Add-on, you can easily add an extra bike to your hitch rack without having to worry about compatibility issues. And, if you have a 4-bike hitch rack, you can use the Saris MTR 1 Bike Add-on to convert it to a 2-bike hitch rack, giving you more flexibility in how you transport your bikes. Whether you’re looking to add an extra bike to your hitch rack or want more flexibility in how you transport your bikes, the Saris MTR 1 Bike Add-on is a great option.