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7 speed Shimano STX hub/cassette compatibility?

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7 speed Shimano STX hub/cassette compatibility?

Old 02-15-21, 07:15 PM
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MrWasabi 
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7 speed Shimano STX hub/cassette compatibility?

Can I swap out my old 7 speed cassette with a 9 speed cassette (CS-HG50) on a Shimano STX hub?

Thanks.
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Old 02-15-21, 07:31 PM
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If you drop one cog-"8 of 9 on 7"
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Old 02-15-21, 07:38 PM
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You do need shifters that are compatible with the cog spacing; which is driven by the number of cogs in a full cassette.

John
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Old 02-15-21, 07:44 PM
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To fit 9 cogs on a 7sp Shimano freehub, one can remove the freehub and install a 8+ sp freehub. The easiest way to do this is to get a complete donor rear Shimano hub and transplant the entire axle, drive side bearings and cones, and freehub.
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Old 02-16-21, 01:38 AM
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7 Speed FH bodies are shorter than 8-9 speed FH bodies.
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Old 02-17-21, 10:09 AM
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Originally Posted by DorkDisk View Post
To fit 9 cogs on a 7sp Shimano freehub, one can remove the freehub and install a 8+ sp freehub. The easiest way to do this is to get a complete donor rear Shimano hub and transplant the entire axle, drive side bearings and cones, and freehub.
This is important as you want to use the correct cone and DS seals changed in diameter throughout the 90ís.

I believe the HG-50 freehub body has a thin flange. It would be best to find and 8-10 speed one with a thin flange. If you donít it will make the DS even wider. Regardless of what 8-10 freehub body you use, you will need to re-dish the wheel to center it in the frame. The less you need to re-dish the better chance you have to not run out of spoke/nipple threads.

John
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Old 02-17-21, 12:43 PM
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What size wheel? A lot of times these older 7sp MTB hubs have 130mm OLD width. You can easily find a 130mm road wheel with 8,9,10 speed hub on Craigslist all day long.
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