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Old 01-23-07, 03:44 PM   #1
Galtman
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10 speed cassette on 8 speed hub?

A 10 speed Shimano cassette will fit on an 8 speed hub, right? And you just have to use the included spacer?
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Old 01-23-07, 03:50 PM   #2
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Correct.
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Old 01-23-07, 03:56 PM   #3
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That's what I thought. So, any ideas why my LBS said they can't install a 10sp cassette on a set of Specialized Tri-Spokes (freehub version)?
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Old 01-23-07, 04:46 PM   #4
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Did your LBS give any reasons as to why they wouldn't? If they said "it's not compatible" did they say why? Do you possibly have a Campy freehub on the Specialized tri-spoke? (I'm not sure those were ever even available with Campy freehubs, but it's a possibility.)
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Old 01-23-07, 05:27 PM   #5
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Quote:
Originally Posted by timcupery
Did your LBS give any reasons as to why they wouldn't? If they said "it's not compatible" did they say why? Do you possibly have a Campy freehub on the Specialized tri-spoke? (I'm not sure those were ever even available with Campy freehubs, but it's a possibility.)
Tim makes a good point. I assumed, possibly incorrectly, that you had a Shimano 8-speed freehub which any Shimano 9 or 10-speed cassette will fit. If your freehub body is 8-speed Campy, then no Shimano cassette will fit and 9 or 10-speed Campy cassettes won't either.
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Old 01-23-07, 09:01 PM   #6
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It's definitely a Shimano freehub.

I went in to ask if I should buy the wheels (a local guy is selling them). The manager of the shop took a look at them and said something like "well, the first thing about them is that it's an 8 speed hub, so if you're running 10 speed then they won't work." I didn't question him about it, but I thought I remembered that 8 and 10 speed were compatible.
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Old 01-25-07, 08:20 AM   #7
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There may be two minor problems: 11-tooth clearance and right side clearance.

– If you have an old bike, you may have a non-compact Hyperglide freehub body, which would not be compatible with an 11-tooth starting cog. If that's the case, you need to either file off the right edge of the freehub body or get a new one (20 $ plus labour). Recent bikes should be OK, though I'm not sure when Shimano started to sell only Hyperglide C bodies.

– With the exception stated above, all "8-speed bodies" are in fact 8/9/10-speed compatible. However, a 9-speed cassette is about 1 mm wider than an 8-speed cassette and a 10-speed cassette is another 1 mm wider. If your chain was really close to the seatstay on your current 8-speed drivetrain, it may be too close for comfort on the 9 or 10-speed drivetrain. In that case, adding a washer on the right side of the axle might be all that you need.
BTW, I have experienced that problem with an older 6/7 speed bike.

And of course, with a 10-speed cassette, you will need 10-speed shifters and a 10-speed chain.
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Old 01-25-07, 12:36 PM   #8
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One thing you might want to consider, Ask around to see if the Freehub body on the Tri-Spoke can be changed, and if so what's available. If so it's just a matter of putting the right new one on... Especially if it takes shimano bodies...
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Old 01-25-07, 06:26 PM   #9
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I have put a Dura Ace 11-21 10 speed cassette on a Specialized trispoke. (The cassette body is threaded at the end)

Worked fine.
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Old 02-19-09, 11:31 AM   #10
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10 speed cassette on 8 speed hub? - back from the crypt

Sorry to reopen an ancient thread, but at least you know I did do a search

I have a DA 8-speed hub that I have now retrofitted with an ultegra 10-speed cassette. It works fine.

The problem is that I now want to clean the cassette, but my Park cassette tool will only go in a little bit and so it's pretty difficult to get enough torque on it to remove the cassette. Is this because of the 8-speed DA hub, or do I just need to try to shove the cassette tool on a little harder (I'd probably have to use a hammer to get it on any tighter)?

The shop was able to remove it when they repacked the hub for me before winter, but I'd sure like to be able to get it off myself.

Thanks.
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Old 02-19-09, 11:47 AM   #11
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If you have the right cassette tool (Park FR-5 or FR-5g) then the teeth only need to engage the lockring by about 2 mm... then use your QR skewer to hold the tool in place while you torque on it with a wrench or in a vise.

If you are using any other Park Tool model then it was not designed for Shimano (or Shimano compatible) cassettes and will probably not work.
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Old 02-19-09, 03:25 PM   #12
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I think it's a Park FR-5. But the tool won't go in far enough to get the skewer all the way through it.
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Old 11-24-11, 05:46 PM   #13
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Hey guys, sorry, i know its an old thread, but do all new cassettes come with the spacer to put a 10 speed on an 8 speed hub?
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Old 11-24-11, 06:20 PM   #14
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If Shimano's own, yes, but you really need to ask this in a new thread, not keep re-opening history, for it being an 8 speed hub, all 8 speed Shimano hubs, can take all current Shimano 8/9/10 speed cassettes, 11 speed Dura Ace is currently unknown for what type of hub it will need.
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Old 11-24-11, 07:41 PM   #15
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unless a shimano 10-speed cassette is narrower overall than an 8-speed cassette, and i can't imagine that it is, then how could a spacer help? i can understand mounting an 8-speed cassette on a 10-speed shimano hyperglide freehub by using a spacer but it can't work both ways. unless the spacer being referred to is on the axle or between the freehub and hub body. where is the spacer being referred to going to attach?

Last edited by hueyhoolihan; 11-24-11 at 07:45 PM.
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Old 11-24-11, 08:09 PM   #16
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The spacer in question fits into a recessed part of the back of the 10-speed cassette as is needed with most 8,9,10-speed Shimano compatible hubs. It is approximately 1 mm thick and is included with all new 10-speed Shimano cassettes.
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Old 11-24-11, 08:18 PM   #17
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thanks ^ for that,

so i am guessing all shimano 8,9,10 freehub bodies are the same and can accommodate 8,9,10 cassettes with the appropriate spacer. in this case a NARROWER spacer. am i getting it? or am i still in the dark?
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Old 11-24-11, 09:39 PM   #18
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Understandably only slightly in the shade.
There are a few Shimano hubs, that I am aware of, that are 10-speed only. These were used on Shimano branded wheels. Those do not use the spacer. Shimano 8 and 9-speed cassettes do not require a spacer at the back of the cassette. It's my understanding that "after market" Shimano compatible cassettes, like SRAM or IRD do not require a spacer at the back.

Be aware that many MAVIC hubs require a 2 mm spacer behind all Shimano or Shimano compatible cassettes. This is because MAVIC cassettes are 2 mm wider than Shimano compatible cassettes. This means that a 10-speed Shimano cassette needs both spacers when used on many (not all) MAVIC hubs. The MAVIC spacer where needed comes with the new MAVIC hub.
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Old 11-25-11, 01:03 AM   #19
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thanks for the reply,

and to think i had the audacity to presume i knew the function of a spacer! apparently it can make something both longer AND/or shorter by addition of one. i need some of these for stacking gold coins!!!!!

just kidding. obviously i don't have a 8 or 9 or 10 speed shimano freehub or cassette. next time i'm at the lbs i'll as to take a quick look at one. i need to get into the 21st century.
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Old 11-25-11, 04:18 AM   #20
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Quote:
Originally Posted by Al1943 View Post
There are a few Shimano hubs, that I am aware of, that are 10-speed only.
Only the 7850 series of hubs, and these are no longer availabe unless NOS
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Old 11-25-11, 11:40 AM   #21
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Originally Posted by jimc101 View Post
Only the 7850 series of hubs, and these are no longer availabe unless NOS
Hate to confuse the issue, but I thought it was the 7800/7801 that was 10sp only and that the 7850 was the replacement that did work with everything. Also, I think the same generation ultegra wheelset was 10sp only.
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