aprox 50-55 mpg. all depends on the wrist. riding at altitude has it's advantages as sea level guys report in the 35-40 range. bring some msr fuel bottles if you need more. the acerbis tank is over 5, but i hear makes the bike funky to ride when full because of weight. if you suspect you'll need the mileage than that's the one to get. hey i like that circle of water tee you make! i emailed my salida friend rene about it for her husband dan who is a boat/board freak. did you sell your wives old bike. i have a short friend who need a dual sport start.