I’m often asked what adapter spacers to use when mounting different road cassettes. The answer depends on your freehub and cassette. If you’re a Campagnolo user, the good news is no spacers are required if you’re using 9, 10 or 11 speed cassettes. Shimano is more complicated.
Shimano-compatible freehubs utilize the same design for 9 speed and 10 speed (ignoring the special outlier case of Dura-Ace 7800 hubs). If you want to run 9 speed with such a hub, no spacers are required. If you want to run 10 speed, a single 1mm spacer is installed behind the cassette. This spacer is packaged with 10 speed cassettes.
When using 11 speed Shimano-compatible hubs with 11 speed cassettes, no spacers are required. 11 speed hubs are backwards compatible with 9 speed when a single 1.85mm spacer is installed behind the cassette. To run 10 speed, install the 1.85mm spacer in combination with the 1mm spacer (2.85mm total). The 1.85mm adapter spacer is usually packaged with 11 speed hubs — if you’re missing this spacer and need one for compatibility, email me and I’ll sort you out.
RECENT TWEETS →
- Say what you will about west coast clouds, they cast an even light on the road and that lets you ride (descend especially) faster. #yyjbike35 days ago
- RT @bikeasana: Here’s the guy & wife who not only honked at us at a red light, but also threatened to run us over. Way to go bud! #yycbike…41 days ago
- The "bike infrastructure" parts of Cedar Hill Rd start and stop variously. Needs continuity now and fixes to suit 8… https://t.co/mv90vHgXHB80 days ago