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Old 06-26-10, 03:12 PM   #1
ClarkinHawaii 
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Dura-ace 9-speed bar end shifters 7700?

These have the little D-ring adaptor on the shifter which allows the rear shifter to be used in friction mode.

The 10-speed dura-ace bar end shifters do not have the friction option on the right/rear shifter.

If i have a bike with complete 105 triple drivetrain 10-speed, can I swap out the 10-speed brifter/shifters for these 9-speed bar ends, use the friction mode, and be good to go leaving everything else as is?

The only thing I can think of is the 10-speed chain might be too narrow if I swap out the 10-speed cassette for a 9-speed (for wider gear range)??
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Old 06-26-10, 03:51 PM   #2
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The 9spd shifters in friction mode will work fine on your 10spd drivetrain.

The 10spd chain will work fine on your 9spd drivetrain.

7800 series barend shifters (10spd) do have a friction mode. 7900 series barend shifters (10spd) do not have a friction mode.
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Old 06-26-10, 04:51 PM   #3
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What a bad decision on the part of Shimano.
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Old 06-26-10, 05:08 PM   #4
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Yeah, they're all sold out of those 7800s--nobody's got them.

I can get 8-speed ultegra barends cheaper than the 9-speed da--they would also work on 10-speed system in friction mode, right?

Sram and Campy barend shifters in friction mode would also work, right? Assuming they have a friction mode.
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Old 06-26-10, 06:19 PM   #5
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Originally Posted by ClarkinHawaii View Post
Yeah, they're all sold out of those 7800s--nobody's got them.
Wow! You're right. I just bought a set 2 months ago and they were in stock at many places.

As for your question on SRAM and Campy working, I'm not 100% sure. I would think Campy would work if it does have a friction mode, but I'm not sure about SRAM because they have a different actuation ratio. You may need to use a SRAM RD.
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Old 06-26-10, 09:25 PM   #6
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Help me out here

OK, so I'm ordering

Shimano HG-50 9-Speed 11-34T MegaRange Cassette AND

Shimano SL-BS77 9-Speed Double/Triple Bar End Shift Levers

with the understanding that I can just replace only the shifters and cassette on my 10-speed system and I'm ready to fly with mtb low gears (I already have an XT long cage rear derail back there), right?

I don't need any spacers to put on the freehub body? As I understand it, I just leave off the 1mm spacer that's on there already, and everything fits like a hand in a glove, right? just like it always works with bike stuff

and then when I want to use my regular 10-speed cassette, I just put the shifter into friction mode, right? this seems too easy
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Old 06-26-10, 09:32 PM   #7
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Wow! You're right. I just bought a set 2 months ago and they were in stock at many places.
Actually i found a few places that still have them--you have to google
SL-BS78 .

I decided to go with the 9-speed, though, since I found them on sale at Niagara for $50 and the 9-speed 11-34 cassette is only 25. If i go with the 10-speed, it's $100 and either $133 for IRD 10-speed 11-34 cassette or wait yet another month for the new Shim mtb 10-speed cassettes which would be $50 minimum and might not work.
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Old 06-26-10, 09:42 PM   #8
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Clark, it sounds like your plan of 9spd MTB cassette with 9spd barend shifters will work. Then use friction mode with 10spd cassette. I don't see any issues with it.
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Old 06-26-10, 10:29 PM   #9
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Great, Thanks.
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