On my old mountain bike I used a Cannondale rack and was able to use the seat post clamp bolt to mount the rack's front stays. You can also find a seat post clamp that has tapped holes for a rack if you have a removable clamp. The Cannondale rack is rated at 50lbs and it has easily handled more on runs to the grocery and Lowes. My LHT had the Tubus Cargo.