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Brifter question

Old 05-10-22, 10:54 PM
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JochenRindt
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Brifter question

I have a 2002 LeMond with a Shimano 105 groupset. I am beginning to suspect that the brifters may need to be replaced sooner rather than later. My question is: will new Sora 9spd R3000 brifters work with my 20 year old 105 derailleurs?
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Old 05-10-22, 11:52 PM
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SoSmellyAir
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Paging cxwrench ...
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Old 05-11-22, 02:59 AM
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Another cheaper option are Sensah shifters which I recently used to upgrade a bike. 100% Shimano compatible and they also come in black or silver.
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Old 05-11-22, 05:44 AM
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If your drivetrain is a 9 speed these should work fine.
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Old 05-11-22, 06:25 AM
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andrewclaus
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Have you tried cleaning them?
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Old 05-11-22, 06:32 AM
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fishboat
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Old 05-11-22, 08:05 AM
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Originally Posted by JochenRindt View Post
I have a 2002 LeMond with a Shimano 105 groupset. I am beginning to suspect that the brifters may need to be replaced sooner rather than later. My question is: will new Sora 9spd R3000 brifters work with my 20 year old 105 derailleurs?
First try the flush/re-lube mentioned above but, yes, the R3000 shifters will work as they have the same 1.7 pull ratio. As mentioned the Sensa and Microshift brand will also work. Here's a chart listing most 9 speed systems with a 1.7 pull ratio that will work with your setup. Just look right to the columns that say "Nominal Speeds" and "Pull Ratio" and make sure they're road, not MTB shifters Bicycle Cassettes & Drivetrains - Google Sheets
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Old 05-11-22, 09:02 AM
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Iride01
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Even if they don't work with your old DR's. Derailleurs are surprisingly inexpensive.

And they are STI's if talking about Shimano integrated shift lever and brake lever units. That other word has always sounded corny to me even from the time it was coined back in the 90's
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Old 05-11-22, 02:25 PM
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NO. The ST R3000 (for the 2X9) has the wrong pull ratio for the FD. The R3000 uses the same FD pull ratio as the Tiagra 4700 and the 11 sp groupsets.
Now the ST R3030 (for the 3x9) does have the correct pull ratio to mate with the older groupsets like your 105 1055.
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Old 05-11-22, 03:52 PM
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Crankycrank
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Originally Posted by icemilkcoffee View Post
NO. The ST R3000 (for the 2X9) has the wrong pull ratio for the FD. The R3000 uses the same FD pull ratio as the Tiagra 4700 and the 11 sp groupsets.
Now the ST R3030 (for the 3x9) does have the correct pull ratio to mate with the older groupsets like your 105 1055.
Are you sure? This chart claims it's a 1.7 pull but I did find a mistake in the chart once before. Bicycle Cassettes & Drivetrains - Google Sheets
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Old 05-11-22, 04:20 PM
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Originally Posted by JochenRindt View Post
I have a 2002 LeMond with a Shimano 105 groupset. I am beginning to suspect that the brifters may need to be replaced sooner rather than later. My question is: will new Sora 9spd R3000 brifters work with my 20 year old 105 derailleurs?
Back when I rode with the shimano brifters if I had problems the WD-40 flush worked. I did not relube, I just rode and relubed when necessary. I used the same method on my daughter's 7sp and friends different shifters. It even worked on bar-end shifters on a friends touring Trek.
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Old 05-11-22, 07:04 PM
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Originally Posted by Crankycrank View Post
Are you sure? This chart claims it's a 1.7 pull but I did find a mistake in the chart once before. Bicycle Cassettes & Drivetrains - Google Sheets
https://productinfo.shimano.com/down...ty_v038_en.pdf
The ST R3030 is grouped together in the same box as the old ST 3503, meaning they are mutually interchangeable. The ST R3000 on the other hand, is in its own box separate from the old ST3500. Same story with the ST R2000 and the ST R2030.
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Old 05-11-22, 09:15 PM
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Originally Posted by Crankycrank View Post
Are you sure? This chart claims it's a 1.7 pull but I did find a mistake in the chart once before. Bicycle Cassettes & Drivetrains - Google Sheets
1.7 is the RD cable pull. As icemilkcoffee pointed out the issue is with the FD double (R3000) cable pull.

John
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