We have rented them vacation before the last one at WL and let me tell you..................2 of us were middle 50's and 2 were late 20's and a 4 person bike is pretty heavy, took all we had to get it from the WL bike rental place up the hill past where you get on the busses to the trail to FW. We struggled like you couldn't believe, gave it the old gung-ho made it to FW, didn't stop, too tired and pedaled back to the rental place. We were gone less than a half hour and they didn't even charge us. It is a ton of work, worse yet in the humid heat of Florida, always looks like alot of fun but thats only going down hill and there ain't alot of down hills around the WL.