New Freehub for NukeProof Ti Hub? Or reasons why a PG-990 won't fit on XTR freehub?
06-20-20, 05:55 PM
#1
Clark W. Griswold
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New Freehub for NukeProof Ti Hub? Or reasons why a PG-990 won't fit on XTR freehub?
Does anyone know enough about the old Nukeproof Ti hubs to tell me if there is a freehub body that will work on it that can give me space for a 9 speed cassette? Or possibly is the XTR-M900 Freehub body which I believe they used not compatible with my PG-990 11-34 cassette? I am trying to use some older NukeProof Ti hubs on a ti MTB I am building up and the cassette wouldn't fit but did work with an older 11-32 8 speed SRAM cassette. Though I have heard that those freehub bodies only did 12t but I could be wrong as I am not super familiar with vintage MTB nitty gritty.
For those completely unfamiliar with the hubs:
Archival Reviews of Nuke Proof Bike Hubs - the Buyer's Guide, 2015
Thanks in advance.
For those completely unfamiliar with the hubs:
Archival Reviews of Nuke Proof Bike Hubs - the Buyer's Guide, 2015
Thanks in advance.
06-20-20, 07:15 PM
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Can't help you with Nukeproof, but the XTR M900 had a really cool and unique FH body as it was 8 speed and UG/HG compatible. My understanding is that a 9 speed Shimano/SRAM will fit on an 8 speed hub. Technically, a HG cassette up to 10 speed will fit. I understand the 11t question, so I tried an 11t on a 7 speed UG/HG freehub body and it works. Keep in mind an 11t won't slide completely onto a freehub body on any 8-10 Shimano compatible freehub. It has a stop build into the cog.
The XTR M910 had the same HG only freehub body as the XTR M950.
John
The XTR M910 had the same HG only freehub body as the XTR M950.
John
Last edited by 70sSanO; 06-20-20 at 07:29 PM.
06-20-20, 08:26 PM
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If you don’t get any more responses, ask over at mtbr in the vintage, retro, classic sub-forum.
John
John
06-20-20, 08:36 PM
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What exactly do you mean by it won't fit?
The cogs slide on, right?
The splines have to be stepped down about 2mm from the end for an 11t cog to fit on far enough to fully compress the stack.
So adding a 1.85mm spacer is another option to get the cogs all compressed by the 11t cog.
I used to use a bench grinder to get an 11t cassette on the older 8s hubs. Newer 8s hubs intended for "compact" 11-28t cassettes had the splines cut down already.
The cogs slide on, right?
The splines have to be stepped down about 2mm from the end for an 11t cog to fit on far enough to fully compress the stack.
So adding a 1.85mm spacer is another option to get the cogs all compressed by the 11t cog.
I used to use a bench grinder to get an 11t cassette on the older 8s hubs. Newer 8s hubs intended for "compact" 11-28t cassettes had the splines cut down already.
