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Dura Ace CS-7800 assembly

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Dura Ace CS-7800 assembly

Old 03-01-13, 07:07 PM
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Dura Ace CS-7800 assembly

Hello all,

I have a rather plain but important question regarding assembling my wheel. I have a DA 7800 hub and it's being mated to a CS-7800 cassette. The assembly pdf is located here,
https://techdocs.shimano.com/media/te...9830608753.pdf

My question is looks like the spacer, and I'm assuming it's the "Low Spacer" item 12 of the pdf, is too small to fit my hub. It only goes on ~5 mm on the hub till it's stopped because the hub has a bigger diameter at this point. (can add pics if needed). My question is, do I really need this spacer or is it an option? Probably do need it, but I thought I'd ask. The wheel was bought from one person and the cassette from another.

Any help on this would be most welcomed and appreciated. Hope all is going well with everyone.
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Old 03-01-13, 07:27 PM
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You have one of the relatively rare Shimano hubs with an aluminum freehub body and much taller splines than the more common 8/9/10-speed compatible freehubs. As such, your hubs will fit Shimano 10-speed cassettes ONLY and do not require the thin spacer these cassettes need when used on 8/9/120-speed bodies. BTW, these hubs will not accept SRAM 10-speed cassettes either.
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Old 03-01-13, 10:54 PM
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Yeah I was made aware of these hubs after I acquired them. They were at a really good price from my local craigslist. I'm happy I got them. Always wanted some Open Pro wheels and these were perfect for what I was looking for. 32/28 holes with bladed spokes round out the package. I just learned later on on my limits with the cassettes I had to get. Stuck with DA to avoid any problems.

Thank you for your response. Really helped me out. Wish you the best.
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Old 03-02-13, 06:06 PM
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Originally Posted by User1
I just learned later on on my limits with the cassettes I had to get. Stuck with DA to avoid any problems.
You are limited to Shimano 10-speed cassettes but not to Dura Ace. Any Shimano 10-speed cassette, including Ultegra and 105 versions, will work fine at lower cost.
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Old 03-03-13, 01:07 AM
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Originally Posted by HillRider
You are limited to Shimano 10-speed cassettes but not to Dura Ace. Any Shimano 10-speed cassette, including Ultegra and 105 versions, will work fine at lower cost.
dont forgot about tiagra 10s
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Old 03-03-13, 10:00 AM
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Originally Posted by gilaasepeda
dont forgot about tiagra 10s
Naaah, Tiagra is too downmarket to be used on a Dura Ace hub. Your buddies will sneer at you.

To the OP: Yes. Tiagra will indeed work.
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Old 03-03-13, 02:04 PM
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Yeah I knew there were others that would work. Pretty much if it was a 10 speed cassette, it should work, but I drew my limits. Anything from the 105, Ultegra, to Dura Ace. I didn't want to be ridiculed by my piers so I wanted to get a DA if I had a chance, and sure enough I did. Hope I'm able to keep the snickering at bay
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