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ULTRA N00b MISTAKE... please point me in the right direction

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ULTRA N00b MISTAKE... please point me in the right direction

Old 04-21-13, 05:55 PM
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dennis_said
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ULTRA N00b MISTAKE... please point me in the right direction

Hello guys, I upgraded wheels yesterday and learned how to do the cassette exchange via youtube... it worked out great until today I was shifting and had some random issues w/ gears not fully engaging and my pedal dropping slightly. Not enough to ruin my ride but when I went home I realized that there were TWO spacers left on my OLD wheel.

(I had picked up the cassette via the LARGEST cog and didn't realize that there were two spaces "below" it and the spacers just stayed on the free hub of the old wheel.

Without even thinking about it I removed the two spacers and now have totally forgotten which one goes into the free hub before the other.

I have attached a pic to see if anybody can help me... one appears to be a KEYED spacer and the other a typical washer looking spacer. I know for sure these are between the LARGEST cog and the wheel, just dunno the order. Thanks in advance for any guidance... I took the picture ASSUMING the KEYED one (the left one in pic) right one in pic).

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cog.jpg (107.4 KB, 118 views)

Last edited by dennis_said; 04-21-13 at 06:21 PM.
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Old 04-21-13, 06:50 PM
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You have to start saying, what brand of cassette/bike/year and even the color of the bike you are talking about.

Nobody here (that I know of) have power to guess what bike do you have.

Good luck and pay attention next time.
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Old 04-21-13, 06:55 PM
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Yeah, they look like spacers for certain speed cassettes on certain free-hubs. Try looking up the specs of the wheel on your manufactures site, possibly event contact them. If one of them has been machined to fit on against the cassette/wheel it might be clear upon lose inspection on the spacers, freehubs, wheel/hub and cassette.
Good luck!
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Old 04-21-13, 07:05 PM
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Thanks guys for the replies, it's a Shimano 10 speed cassette
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Old 04-21-13, 07:18 PM
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I only remember having the one on the right which is smooth all around.
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Old 04-21-13, 07:33 PM
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Originally Posted by dennis_said View Post
Thanks guys for the replies, it's a Shimano 10 speed cassette
More likely than not, you only need to use the washer looking spacer. But you need to know what kind of hub you have.
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Old 04-21-13, 07:35 PM
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I usually make this mistake when switching cassettes (11-21 or 11-26) but you can actually figure it out by just looking at the spacing of the cassette.
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Old 04-21-13, 07:36 PM
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Is a trip to your LBS out of the question? For a few bucks or maybe for nothing, they will set you straight. Don't worry about not having bought the wheels or cassette there. Just make sure to throw them some business while you are there. Maybe buy a couple of tubes or some handlebar tape. When you get to the register ask about your cassette spacers. They will be glad to help you.
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Old 04-21-13, 07:56 PM
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Thanks everybody

I was actually able to figure it out by the grease marks/dirt imprints ... I know now the keyed spacer goes in first and then the regular washer on top of it followed by the big cog thanks for pointing me in the right direction.
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Old 04-22-13, 05:50 AM
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The "keyed" one is specific to the wheel it came off of. You don't need it if you changed wheels. The Shimano 10 uses the small washer looking one on the right in the picture.
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Old 04-22-13, 11:03 AM
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Ooh?? I have had some major shifting issue so I was thinking that both should be transferred over. How are you able to tell that the keyed one is wheel specific? Thanks for the knowledge
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Old 04-22-13, 11:18 AM
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Originally Posted by dennis_said View Post
Ooh?? I have had some major shifting issue so I was thinking that both should be transferred over. How are you able to tell that the keyed one is wheel specific? Thanks for the knowledge
Because most wheels that you'd get nowadays wouldn't need it.

BTW, you'll have plenty of shifting issues if your RD is not adjusted properly even if the cassette is mounted correctly.
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Old 04-22-13, 12:29 PM
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Ah okay, yeah, I think my RD is aligned well since before the wheel swap the shifting was precise (at least I think it was haha).... would it hurt if I just installed both of those spacers on then? I tried PMing you guys individually to thank you for your help but my Internet Explorer is kinda out of date and it's giving me errors. so THANKS AGAIN for your help Psimet and Banerjek
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Old 04-22-13, 12:46 PM
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Originally Posted by dennis_said View Post
Ah okay, yeah, I think my RD is aligned well since before the wheel swap the shifting was precise (at least I think it was haha).... would it hurt if I just installed both of those spacers on then? I tried PMing you guys individually to thank you for your help but my Internet Explorer is kinda out of date and it's giving me errors. so THANKS AGAIN for your help Psimet and Banerjek
Sometimes when you swap wheels, you need to adjust the RD.

What you have might be fine for your old wheels but it might not be quite right for the new ones. Being off by just a teeny bit can make it really operate like crap. If all the gears are bad, a slight adjustment to the cable tension should do the trick. It's not a bad idea to check the limit settings too since you really don't want to throw your chain in your spokes.
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Old 04-22-13, 05:48 PM
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As others have said, the smooth washer goes under your cassette. Thanks pismet, because I have never seen 2 on a wheel. left me scratching my head.


and retune your rear derailleur, you may think it was perfectly tuned, but probably not. Although there is a chance that the less then a mm of spacer will put everything back into place.

edit, OP, are the hub/freehub the same size?
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Old 04-22-13, 06:13 PM
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Originally Posted by ultraman6970 View Post
You have to start saying ...the color of the bike you are talking about.
I guess that's because red is fastest?

I have a black and white bike so that splains a lot.
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Old 04-22-13, 08:18 PM
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Originally Posted by dennis_said View Post
Ooh?? I have had some major shifting issue so I was thinking that both should be transferred over. How are you able to tell that the keyed one is wheel specific? Thanks for the knowledge
...i kinda spend a lot of time with wheels...

I get asked this a lot. More than you would think. It has become more of an issue because of the shift to 11 speed (excuse my play on words).

If your wheel comes with a spacer....then you will most likely need to use it. If your cassette comes with a spacer then you will most likely need to use it. If you move the two apart....keep the spacers with what they came with.

A cassette won't come with 2 spacers - ever....so....if you have 2 then 1 was with the wheel and the other was with the cassette.

I might do a blog post about the whole topic that I can keep referring to as a reference. There are actually reasons for all of this....believe it or not.
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Old 04-23-13, 03:40 AM
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1mm spacer is needed for a shimano 10 speed cassette by default on most wheels, it usually comes as part of the cassette.
the keyed spacer is wheel specific as others have mentioned.
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Old 04-23-13, 03:57 AM
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When this all becomes vintage in 20 years time, it's going to be a hell of a hard job making things work.
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Old 04-23-13, 04:41 AM
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Originally Posted by Psimet2001 View Post
...i kinda spend a lot of time with wheels...

I get asked this a lot. More than you would think. It has become more of an issue because of the shift to 11 speed (excuse my play on words).

If your wheel comes with a spacer....then you will most likely need to use it. If your cassette comes with a spacer then you will most likely need to use it. If you move the two apart....keep the spacers with what they came with.

A cassette won't come with 2 spacers - ever....so....if you have 2 then 1 was with the wheel and the other was with the cassette.

I might do a blog post about the whole topic that I can keep referring to as a reference. There are actually reasons for all of this....believe it or not.
There are resons for all this? And here I thought it was simply to keep the bike repair people employed...
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