The bike shop finished my wheel yesterday and I installed it last night and this afternoon. It is a Shimano Nexus Inter-8 Premium Internally Geared Hub with a roller brake. It is absolutley awesome. It shifts flawlessly and without hesitation or any notice at all other than the rpm change. I back off the throttle when I shift. It downshifts like an automatic transmission in your car. This hub is the red band which is a beefed up version. It has sealed bearings which is comforting to me. I also have sealed bearings in the front hub. After a few test runs I went on a ten mile ride this afternoon. I couldn't be happier with it. It tops out about 45 mph and easily cruises 30-35 mph. It took all the hills easily by downshifting. I am running a nine tooth sprocket on the crank side which lets the engine rev quickly and gives it plenty of torque. I guess one reason I'm so pleased with it is because I wasn't sure it would perform well at all on a motorized bike. I had a three speed that jerked so badly when it shifted I couldn't keep chains on it. It also bent the rear axle.