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What's compatible with a Hyperglide 7 speed hub?

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What's compatible with a Hyperglide 7 speed hub?

Old 06-30-08, 08:28 AM
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due ruote 
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What's compatible with a Hyperglide 7 speed hub?

What are my options for swapping out the 7 speed Hyperglide cassette on my Bridgestone XO-4? Does the replacement have to be a Hyperglide, or would Ultegra or Dura-Ace work? This is sort of an experiment so I'm doing it on the cheap via Ebay. I'd like to know what options I can consider. Thanks.

[edit] Also, I seem to recall reading on Sheldon's site that a 9-speed cassette can be converted to 7 speed by removing 2 cogs and maybe using different spacers(?) I can no longer find the reference. Any help with that?

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Old 06-30-08, 11:30 AM
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Unless the ends of the splines are compatible with and 11-tooth cassette cog, they call that Hyperglide-C, then pretty much any 7-speed aftermarket shimano compatible cassette with a 12-tooth or larger smallest cog should work as long as your rear derailleur can handle the largest cog.

You can technically fit 8 cogs on a 7 speed hub if you drill the rivets out of a HG-50, HG-70, etc. type 9-speed cassette (no carriers, just spacers) and remove the largest cog. You would then need a 9-speed shifter with adjusted so its 8 lowest gears correspond to the 8 remaining cogs and the 9th gear does nothing but click and leave the cable slack.
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Old 06-30-08, 11:42 AM
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Originally Posted by cachehiker View Post
Unless the ends of the splines are compatible with and 11-tooth cassette cog, they call that Hyperglide-C, then pretty much any 7-speed aftermarket shimano compatible cassette with a 12-tooth or larger smallest cog should work as long as your rear derailleur can handle the largest cog.
The one I'm removing is an HG-C 11-28, but I don't necessarily want/need an 11. Do I understand correctly that a cassette with a 12 or 13 top will work fine on that hub?

You can technically fit 8 cogs on a 7 speed hub if you drill the rivets out of a HG-50, HG-70, etc. type 9-speed cassette (no carriers, just spacers) and remove the largest cog. You would then need a 9-speed shifter with adjusted so its 8 lowest gears correspond to the 8 remaining cogs and the 9th gear does nothing but click and leave the cable slack.
Good to know about the 8 speeds. I'm going to run this in friction mode so I believe I'll be fine in that regard.
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Old 06-30-08, 01:47 PM
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Originally Posted by jbonamici View Post
The one I'm removing is an HG-C 11-28, but I don't necessarily want/need an 11. Do I understand correctly that a cassette with a 12 or 13 top will work fine on that hub?
Yep. If you look, you'll find the splines don't go all the way through the 11 tooth cog or all the way to the end of the freehub. On the earlier hyperglides, the splines extended all the way through the 12 and 13 tooth cogs and all the way to the end of the freehub. You can't put an 11 tooth HG-C cog on the earlier HG freehubs but the earlier 12 and 13 tooth HG cogs work fine with HG-C freehubs.
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Old 07-03-08, 11:48 AM
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Originally Posted by cachehiker View Post
You can technically fit 8 cogs on a 7 speed hub if you drill the rivets out of a HG-50, HG-70, etc. type 9-speed cassette (no carriers, just spacers) and remove the largest cog.
Does this mean I can't do this if the cassette uses a carrier, or does it just mean I have to eliminate the carrier?
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Old 07-03-08, 06:00 PM
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Originally Posted by jbonamici View Post
Does this mean I can't do this if the cassette uses a carrier, or does it just mean I have to eliminate the carrier?
You can't eliminate a carrier as it has two or three cogs on it and each cog isn't a complete "plate" so the carrier is essential. You could remove one of the loose cogs.
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