Your right. I'm starting to loose my mind here on this bike. I spun the 7spd Uniglide around until it hit the narrow slot that I hadn't noticed before and it fit. But, the 8spd cassette I have has a wide flat groove on it that wont allow it to slide on this hub. I'm very relieved that at least I have a 7spd on there now. Is there any problem with it working with an 8spd STI shifter?