![Replacing 7 speed freehub body with 8, 9, 10, 11s freehub. 3x7 to 2x9 or 1x11 drivetrain upgrade. - YouTube Replacing 7 speed freehub body with 8, 9, 10, 11s freehub. 3x7 to 2x9 or 1x11 drivetrain upgrade. - YouTube](https://i.ytimg.com/vi/lTTCpH6ArCs/maxresdefault.jpg)
Replacing 7 speed freehub body with 8, 9, 10, 11s freehub. 3x7 to 2x9 or 1x11 drivetrain upgrade. - YouTube
![Amazon.com : Wheels Manufacturing Cassette Spacer Converts 8/9 Speed Hub to 7 Speed, Bag of 5 : Bike Cassettes And Freewheels : Sports & Outdoors Amazon.com : Wheels Manufacturing Cassette Spacer Converts 8/9 Speed Hub to 7 Speed, Bag of 5 : Bike Cassettes And Freewheels : Sports & Outdoors](https://m.media-amazon.com/images/I/41q7k9CASBL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : Wheels Manufacturing Cassette Spacer Converts 8/9 Speed Hub to 7 Speed, Bag of 5 : Bike Cassettes And Freewheels : Sports & Outdoors
![maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange](https://i.stack.imgur.com/Ldg5o.png)
maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange
![maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange](https://i.stack.imgur.com/wsWNs.jpg)