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9 to 10 Cassette Spacer Hitting Cassette Binder Pegs - Need some opinions

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9 to 10 Cassette Spacer Hitting Cassette Binder Pegs - Need some opinions

Old 07-09-17, 12:56 PM
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9 to 10 Cassette Spacer Hitting Cassette Binder Pegs - Need some opinions

Fixing a frankenbike and need a second opinion.

Old cassette was a Shimano 10-speed on Mavic Cosmos Cyclocross wheelset. I'm attempting to install a -speed CS-HG50 cassette. On first attempt the cassette was loose on the freehub after tightening the lockring. After some searching I found that the 10-speed uses a 1mm spacer so I tried putting that on per this suggestion:

https://www.bikeforums.net/bicycle-me...-hg50-9-a.html


Concern 1: It's a tight fit for the new cassette on the freehub and not much gripping onto the last cog on the cassette. It doesn't spin freely or anything, but it's not seated very deep:




Concern 2: The biggest ring on the cassette has pins holding all the proceeding rings together. The pins protrude out ever so slightly so then when the lockring is tightened on the freehub the little pins on the cassette push down on the 1mm spacer and it bends a bit (I didn't tighten it down super tight in this photo for the sake of saftey but it makes the spacer look kind of like a crush washer):





This is a a build with frugality in mind and it doesn't have to be pristine, just want it to be solid and safe. Anyone have experience with this issue on the freehub with the pins or a tight fitting cassette with the spacer? Thank you!

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Old 07-09-17, 12:59 PM
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Perhaps I need to get a smaller lockring side spacer such this?

https://www.bikeparts.com/BPC310491/...-tooth-top-cog
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Old 07-09-17, 01:28 PM
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Mavic freehubs generally require a 1.75mm spacer for Shimano cassettes below 11 speed. The 10 speed cassettes generally require an additional 1mm spacer, though there are some exceptions.
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Old 07-09-17, 01:31 PM
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I've ran into 9 speed cassettes that I had to file down the rivets because I didn't have good purchase on the lock ring.
They're soft steel, so they file easily.
These were the CS-HG50 cassettes in 12-23 to 12-27 range on an RM-30 Shimano hub.
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Old 07-09-17, 01:43 PM
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Originally Posted by Bill Kapaun
I've ran into 9 speed cassettes that I had to file down the rivets because I didn't have good purchase on the lock ring.
They're soft steel, so they file easily.
These were the CS-HG50 cassettes in 12-23 to 12-27 range on an RM-30 Shimano hub.
That's a good idea, didn't even think about that! Kind of a weird engineering move by Shimano, the 10-speed has a better ring binding design that doesn't have the rivets.
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Old 07-09-17, 01:49 PM
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Either grind down (you can also remove) the rivets or relieve the spacer ring. There are spacer rings out there with reliefs already in them but I never seem to have one when faced with a cassette like this. You don't need the rivets in there for anything structural, they just make it easy to install the cassette as one unit.
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Old 07-09-17, 01:50 PM
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Originally Posted by Metis
That's a good idea, didn't even think about that! Kind of a weird engineering move by Shimano, the 10-speed has a better ring binding design that doesn't have the rivets.
And the price difference is....
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Old 07-09-17, 02:55 PM
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Probably simpler and easier to just add the reliefs to the spacer ring with a couple strokes of a needle file, then you don't have to futz with this cassette or the future cassettes you'll be using...
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Old 07-09-17, 08:27 PM
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Originally Posted by rccardr
There are spacer rings out there with reliefs already in them but I never seem to have one when faced with a cassette like this.
Success! Took the wheel into my local mechanic and in about five seconds he said "Oh you need a special Mavic spacer." Had one there and sold it to me for a buck, comes with three reliefs just for the cassette. Odd huh?




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Old 07-09-17, 08:31 PM
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Perfect! By the way, those are some nice pictures.
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Old 07-09-17, 09:03 PM
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Originally Posted by Metis
Success! Took the wheel into my local mechanic and in about five seconds he said "Oh you need a special Mavic spacer." Had one there and sold it to me for a buck, comes with three reliefs just for the cassette. Odd huh? ]
Timely post! I just got a set of Mavic Open Sport rims using Shimano 105 hubs. It came with a spacer and directions saying the spacer was for using 10-speed cassettes with 11-speed hubs. The included spacer has the three relief cutouts that you describe.

Like you, I'll be using a 9-speed cassette initially. So now I'm wondering if I need to use the spacer for my 9-speed cassette that arrives soon.
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Old 07-10-17, 07:05 AM
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MTB 10 speed cassettes don't use the 1mm spacer - just road. Since it's Mavic you needed the Mavic spacer.
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