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Broken 10 speed DA, now what?

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Broken 10 speed DA, now what?

Old 03-22-20, 08:41 PM
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draganm
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Broken 10 speed DA, now what?

had a malfunctioning DA 7900 10 speed right shifter for quite some time now2, would float between 2 of the gears like 5th and 6 cog down. New housing, new cable, new RD, no joy. Finally took the shifter apart last night and had what looked like pieces of metal washer fall out. No idea what it was since Shimano doesn't offer exploded diagrams of this part. Shifters are pretty old were used a lot, one of the 2 gear tracks , the one for up-shifting was worn down pretty bad compared to it's brother for down shifting, which would make sense as the load is much higher going up.

Tried ot re-assemble anyway after cleaning, which was a nightmare. After an hour hucked it all in the trash. This is off a 2013 full Carbon bike, but the shifters were probably 2010-11. I want get it back on the road and either ride iot or sell it. What should i buy, I've lost track of all the lates-doo-dads. Don't want to spend a fortune, the DA pair set me back $450.

I don't want Shimano back in there, since SRAM will require yet another new RD, but will if it's cheaper . Doesn't look cheaper, Shimano R8000 will set me back $500. with cassette.
Sram Rival new take-off for $200.-$300. with shifters , cassette, RD, and chain?

I don't care about weight, i want good function and durability. please let me know your experiences with any of this stuff (that you have used please)

Last edited by draganm; 03-22-20 at 08:49 PM.
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Old 03-22-20, 09:25 PM
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ebay. buy one used 10 right side shifter. choose whatever level you want to afford.

https://www.ebay.com/p/1800482119?iid=324074423409&chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=324074423409&targetid=883676038459&device=c&mktype=pla&googleloc=9032311&poi=&campa ignid=9423618864&mkgroupid=95235862986&rlsatarget=aud-622524041038la-883676038459&abcId=1141016&merchantid=114696562&gclid=Cj0KCQjwmdzzBRC7ARIsANdqRRmBZWpCqFBQhkW3EstOgH 3XTwalw9LQJKnpGnVDP6x7Dhs_8uxjhC4aArw7EALw_wcB
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Old 03-22-20, 09:45 PM
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what eflayer said...probably the least amount of pain to simply replace the shifter with Shimano DA, as before...
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Old 03-22-20, 10:20 PM
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My DA 7900 right shifter crapped out, probably owing to sweat damage from the trainer. I replaced it with a 105 5700 10 speed shifter. I do notice the difference - the 105 sort of chafes at my fingers in a way the DA didn't, but it functions fine. They are available new for about $100
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Old 03-23-20, 03:31 AM
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Depends on how worn everything else is, and budget. If everything else good and budget low, agree get used or NOS D-A, Ultegra, or 105 10s shifter. Use EBay or ask a friend if they have one.

If you want a whole new groupset, the latest 105 or Ultegra are quite well reviewed. You may need to verify rear wheel easy to fit 11s.
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Old 03-23-20, 08:47 AM
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Originally Posted by datlas View Post
Depends on how worn everything else is, and budget. If everything else good and budget low, agree get used or NOS D-A, Ultegra, or 105 10s shifter. Use EBay or ask a friend if they have one.
.
+1

A new 5700 rear shifter is about $100

https://www.ebay.com/itm/Shimano-105...eamDH&LH_BIN=1
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Old 03-23-20, 11:08 AM
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After recently giving up on trying to fix a faulty left-side 7900 lever, I was able to find a replacement on eBay in very good condition for about $200. It's just kind of hit or miss is anyone is selling single levers.
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Old 03-23-20, 01:08 PM
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Originally Posted by Eric F View Post
After recently giving up on trying to fix a faulty left-side 7900 lever, I was able to find a replacement on eBay in very good condition for about $200. It's just kind of hit or miss is anyone is selling single levers.
I don’t know about single 7900 shifters, but 5700/6700 are available singularly.
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Old 03-23-20, 07:31 PM
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I really don't want o gamble with used shifters, especially 7800, lots of guys had problems with those in my club and switched to Sram.

As for putting 10 speed 105 there, If i sell the bike, it would be really hard and price would suffer with mismatched parts.

No love for Sram ? This Rival group looks obviously new, taken off a production bike.200 bucks
https://www.ebay.com/itm/Sram-Rival-...t/264661768401

or this? shimano R7000 $330.
https://www.ebay.com/itm/Shimano-105...Dd46f3szYpuxcw

Originally Posted by datlas View Post
Depends on how worn everything else is, and budget. If everything else good and budget low, agree get used or NOS D-A, Ultegra, or 105 10s shifter. Use EBay or ask a friend if they have one. You may need to verify rear wheel easy to fit 11s.
should be 11 compatible, rear wheel is only maybe a year or 2 old, built it with help from you guys

Last edited by draganm; 03-23-20 at 11:37 PM.
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Old 03-24-20, 08:44 AM
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Originally Posted by draganm View Post
I really don't want o gamble with used shifters, especially 7800, lots of guys had problems with those in my club and switched to Sram.
It's pretty obvious you want to go with SRAM, so why ask our advice?
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Old 03-24-20, 10:06 AM
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Originally Posted by draganm View Post
As for putting 10 speed 105 there, If i sell the bike, it would be really hard and price would suffer with mismatched parts.
Uh, the bike is 10 years old and was used enough to wear out an STI? I doubt that it has much resale value either way.
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Old 03-24-20, 10:46 AM
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Originally Posted by noodle soup View Post
It's pretty obvious you want to go with SRAM, so why ask our advice?
Originally Posted by MinnMan View Post
Uh, the bike is 10 years old and was used enough to wear out an STI? I doubt that it has much resale value either way.
Agree with both of these. Disobey BF Wisdom at your peril!
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Old 03-24-20, 11:53 AM
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Originally Posted by noodle soup View Post
It's pretty obvious you want to go with SRAM, so why ask our advice?
so your saying go with the 105 " R7000" for $300.. I'm kind of leaning that way too actually. They just look a lot better, and the SRAM take-off's don't come with FD


Originally Posted by MinnMan View Post
Uh, the bike is 10 years old and was used enough to wear out an STI? I doubt that it has much resale value either way.
Bike is 7 years old since build, and shifters were moved over from an AL frame i rode the hell out of. 70% of wear on shifters from first bicycle.

This frame i only rode seriously for 2 years, rode somewhat for 2, and little or not at all last 3. Wound up damaging my feet from ill-fitting shoes and upper-lower back from sliding a slammed position

So plan is now, flip the stem over, sit-up, ride easy if possible. If not possible sell. Bicyle blue-book showing a value of $750. in good condition, so even if i fix and sell, I'll still be $400. ahead. Hoping to ride again though

If anyone has impression , likes/dislikes 105-7000 please share. I would expect it to be on par with 7900 right ?- (function, not weight)
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Old 03-24-20, 12:03 PM
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R7000 is 11 speed. In order to use it with your bike you need an 11 speed freehub body on your wheels.

Current Tiagra is available in 10 speed but I think the cable pull wants to work with the matching Tiagra rear derailleur.
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Old 03-24-20, 12:11 PM
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Originally Posted by datlas View Post
Depends on how worn everything else is, and budget. If everything else good and budget low, agree get used or NOS D-A, Ultegra, or 105 10s shifter. Use EBay or ask a friend if they have one.

If you want a whole new groupset, the latest 105 or Ultegra are quite well reviewed. You may need to verify rear wheel easy to fit 11s.
I have bikes with 11 sp 105, 10 sp DA (12 yrs. old) , Ultegra 10 sp. and SRAM Red 10 sp (4 yrs. old). The 105 11sp is the best shifting. The rest are all very good but I had no problem with buying my new CAAD12 w/105. IMO the biggest difference between new 105 and DA is weight not function. And, cost of course.
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Old 03-24-20, 12:23 PM
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Originally Posted by masi61 View Post
R7000 is 11 speed. In order to use it with your bike you need an 11 speed freehub body on your wheels.
Unless the wheel is really old, the freehub is probably already 11 speed compatible with a spacer to adapt it to 11 speed. If not, add the associated cost of a new rear hub and/or wheel.
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Old 03-24-20, 02:15 PM
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Originally Posted by bruce19 View Post
I have bikes with 11 sp 105, 10 sp DA (12 yrs. old) , Ultegra 10 sp. and SRAM Red 10 sp (4 yrs. old). The 105 11sp is the best shifting. The rest are all very good but I had no problem with buying my new CAAD12 w/105. IMO the biggest difference between new 105 and DA is weight not function. And, cost of course.
thanks, those results don't surprise me. Newer tech is usually always better

My current hub, built April 2018

DT Swiss 350 Rear Hubs. The new standard for durability and price.

Made in Switzerland by DT Swiss with Patented Star-Ratchet system
Item Specifications
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Old 03-24-20, 03:13 PM
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Originally Posted by draganm View Post
so your saying go with the 105 " R7000" for $300.. I'm kind of leaning that way too actually. They just look a lot better,
New 7000 series shifters alone won't work with your 7900 derailleurs, but your brakes, crankset. and wheelset will..

I'd look for a mini-groupset that includes shifters, derailleurs, 11spd cassette, and chain. If you aren't in a huge hurry Aliexpress usually has them available for a good price.

something like this https://www.aliexpress.com/item/3285...8cef464cHanJkQ

Last edited by noodle soup; 03-24-20 at 03:21 PM.
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Old 03-24-20, 05:31 PM
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Old 03-25-20, 07:31 PM
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If you want to lay as little money as possible. If you can get 105 replace it with 105, it's cheap and works well. The last few friends of mine who had Dura Ace and Ultegra 10 speed stuff, were replaced with Tiagra because 105 and up are now 11 speed.

Good Luck
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Old 03-25-20, 08:21 PM
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Originally Posted by Joe G View Post
If you want to lay as little money as possible. If you can get 105 replace it with 105, it's cheap and works well. The last few friends of mine who had Dura Ace and Ultegra 10 speed stuff, were replaced with Tiagra because 105 and up are now 11 speed.

Good Luck
the new Tiagra 10spd shifters don't work with 7900/6700/5700 10speed derailleurs.
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Old 03-25-20, 08:46 PM
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Originally Posted by noodle soup View Post
New 7000 series shifters alone won't work with your 7900 derailleurs, but your brakes, crankset. and wheelset will..
I'd look for a mini-groupset that includes shifters, derailleurs, 11spd cassette, and chain. If you aren't in a huge hurry Aliexpress usually has them available for a good price.

something like this https://www.aliexpress.com/item/3285...8cef464cHanJkQ
oh man, $289 shipped., that is a sweet deal
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Old 03-25-20, 09:28 PM
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Originally Posted by draganm View Post
oh man, $289 shipped., that is a sweet deal
shipping is really slow, but if you have the time...
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Old 03-25-20, 10:53 PM
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Originally Posted by noodle soup View Post
shipping is really slow, but if you have the time...
aliexpress. Probably coming from China.
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Old 03-26-20, 03:57 AM
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Originally Posted by mackgoo View Post
Campy
Exactly! You can rebuild this shifter mechanism with Campy. But honestly, if the OP simply wants to fix his bike and get back out there, buying an entirely new groupset does not make $ sense. Find a used or NOS right Shimano 10 speed STI lever. Given that this is the dominant brand, this should not be impossible to do.
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