If I would to use the Shimano deore T610 hub with 9 speed casette (hg400 11-32) - I need spacer ring? If yes, what size?
1 Answer
No spacer ring is required, as T610 is a 8-10 speed hub.
Shimano freehub widths have been:
- 7 speed width: you can only mount 7 speed cassettes
- 8-10 speed width: you can mount 8-10 speed cassettes and 11-speed "MTB" cassettes in which case the big sprocket overhangs the right hub flange
- 11-speed "road" width: you can mount 11-speed "road" cassettes without a spacer and 8-10 speed "road" cassettes and 8-11-speed "MTB" cassettes with a 1.85mm spacer
I don't think official spacers to run 7 speed cassettes on more modern hubs are available, but it may be possible to make your own.
Further complicating matters is that some 10-speed "road" cassettes with aluminum spider (such as CS-7800 and CS-7900) require an additional 1mm spacer to run on 8-10 speed hubs. If you run such a cassette on 11-speed "road" hub then you need the 1mm spacer and the 1.85mm spacer together.
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Actually, 7 speed cassettes can be mounted on 8-10 speed hubs with a 4.5mm spacer; there are some things to watch out for, as described online, for example here: bike.bikegremlin.com/1259/bicycle-rear-hub-compatibility sheldonbrown.com is always a good source for such interoperability questions.– ArmandCommented Aug 16, 2021 at 10:52
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Yes, that might be possible but I haven't seen the 4.5mm spacers for sale anywhere.– juhistCommented Aug 16, 2021 at 16:45