How can I tell what speed cassettes these are?

[weisan]

I am going bananas trying to figure out what speed these bottom clusters of shimano cassettes are...9,10,11 speed?

Is there a quick and easy way to determine that?

[ultraman6970]

If im not wrong, I believe you are missing the last 2 cogs in all of them, which are lose. Long time that I dont use shimano.

[tv_vt]

I think OP realizes that some cogs are missing.

Anyway, you could look up cog spacing for Shimano 8,9,10, and 11 speed. Should be on the net somewhere. Then try to measure spacing of what you have.

Differences are going to be very small, though. Maybe figure out how thick the actual cogs are for the different speeds and add to cog spacing and measure over 3 or 4 cogs, if that makes sense.

PS. Are any of these labeled anywhere? If you see 6500 or 7800 or whatever anywhere, you know what you've got...

[David Kirk]

Is the shimano pat number stamped on the backside of the largest cog?

dave

[Black Dog]

Place them on a table next to each other with the smallest cog down. Put them next to each other and look along the plane of the table and you will be able to see the difference in spacing. Once you find out what only one of them is through a part number stamp you will know the speed of each cassette by comparison.

[Jaybee]

Originally Posted by Black Dog

Place them on a table next to each other with the smallest cog down. Put them next to each other and look along the plane of the table and you will be able to see the difference in spacing. Once you find out what only one of them is through a part number stamp you will know the speed of each cassette by comparison.

To add to this - if you can't find part numbers on the back of the largest cog, take a known cassette from your parts bin and lay it side by side with an unknown to compare with the others. I have used this to determine the difference between 9 and 10 speed SRAM.

[weisan]

Thank you for all the responses. No label as far as I can tell.
I have thought of the suggestions from tv and black pal, I figure maybe there are other more obvious visual cues that I missed.

[cmbicycles]

They all have 7 cogs so the must be 7 speed.

I would guess 9 or 10s. The smallest gear appears to be a 14 on the one I counted, and the others appear similar, so I'd guess these are 12-xx cassettes since the lower tooth cogs are usually sequential... If they are 10s, lowest would be 11t. Do you have the loose cogs for these cassettes? If so it might say on the spacers and often has model # on the lockring.

[Ti Designs]

Get a spacer from a 7,8,9,10 and 11 speed cassette and use it as a go/no-go gauge.

[Kontact]

Hold the cassettes up to ones you have on your bikes.

Here's all the spacing if you have calipers:
https://www.sheldonbrown.com/cribsheet-spacing.html

[oliver1850]

Seven cogs of a Shimano 9 speed cassette measure 27.7 mm overall.

Seven cogs of a Shimano 10 speed cassette measure 25.2 mm overall.

SRAM should be fairly close.

Another way to ID Shimano 10 is that there will be a step in the web of the large cog which moves the teeth in toward the spokes. 9 speed large cogs are flat.

[weisan]

Thank you pals for doing the legwork on my behalf, I really appreciate it.