Great for sand dunes and also the mountains! High performance, excellent condition. We have 2 identical for sale. $3800 each if you want it with both sets of tires (sand paddles and mountain) or $3500 without the paddles. Both run EXCELLENT. Prices are firm and no, we aren't downloading any weird apps to do a so called zoom call so scammers go away lol, and no discounts for buying all 3. These are great bikes.