Yup -- I've had mine for almost a year. I *think* overinflating to 44 has helped a little bit, but overall it's been a 10% penalty that hasn't gotten better. I used to regularly get 48 EV miles in moderate temps, but have only seen that once. Oh well, still getting 100 mpg lifetime so I'm happy.Yeah, you're gonna take a range hit. The Driveguards are heavier (those tank sidewalls!) and have higher rolling resistance than the OEMs. But at least you'll never have to worry about being stranded on the side of the road with a blow out!