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What brifters/STI shifters could be used for a 2 x 7 speed

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What brifters/STI shifters could be used for a 2 x 7 speed

Old 06-26-18, 06:05 PM
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rickrob 
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What brifters/STI shifters could be used for a 2 x 7 speed

I was thinking of converting my Bridgestone to Brifters/ STI shifters. Right now it has a Shimano RD-6208 600 EX rear derailleur and a Shimano FD-6207 600 EX front derailleur. I think the 600 EX rear will handle a 7 speed freewheel. Is there a set of Brifters that would work with this combination? I've looked at the Microshift SB-R472, which they say is a 2 X 7. Are there any Shimano models (older or newer) that would work?
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Old 06-26-18, 07:28 PM
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Shimano 105/ 1055 group. 1056 had the black 8 sp. hub bodies; 1055 had the shorter 7 sp. bronze ones.

RSX Blue (the A410 group), was 2/3 x 7 STI.

Granted, all of the above were HG, but I wouldn't think that would have any direct effect on the shifting.

For more modern shifters, I'd look into Claris; speaking from personal experience, it's not bad & incorporates a lot of nice features (like FD trim positions) from the earlier higher-end groups.

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Old 06-26-18, 07:39 PM
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Shimano RSX and 105 both came in 2x7 and are usually found pretty cheap on the big auction site (but I got mine in the C&V for sale subforum). I've got the early 105 on my Raleigh USA Technium RT600, and they work just fine. They are the old school construction that is relatively easy to disassemble for cleaning or repair.

EDIT: Looking back a some old threads, it seems my 105 brifters may actually be 8-speed, but work fine on a 7-speed cassette because the cog spacing is very close, 4.8 vs 5.0 mm. I do remember spending some time dialing in the RD adjustment to consistently get one clean shift per click.

(and yes, I eventually unwrapped the left side and moved the brifter to more or less match the position of the drive side)

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Old 06-26-18, 08:17 PM
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I like the Microshift 2/3x7 cog brifters over any of the Shimano ones.

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Old 06-26-18, 11:28 PM
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I have 2x7 microshift on the bike below. I like the 2 paddle design. 1 for up shift, 1 for downshift, and then 1 lever for brake.
the shape is different than any shimano levers since STI was introduced, just be aware. I am fine using them for multi hour rides even though the shape is different.
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Old 06-27-18, 12:01 AM
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I have Microshift 3x7 on my 520 and have no complaints. The only other STI shifters I have to compare them to is Sora. The Sora felt a little nicer to change gears, and they have a quieter click, while the Microshift has more of a button to change to a smaller cog.

I also have a set of MicroNew 3x7 which I bought them for a budget build. They feel and look the same as my Microshifts, but I only have a couple of laps around the block on them so far.
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Old 06-27-18, 12:06 PM
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I have 3x7 MicroShifts on my 520 as well, and while they aren't to the level of my Ultegra STI's that I have on my other bikes, I think they do a fine job. And they can be picked up fairly cheap on eBay.
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Old 06-27-18, 12:14 PM
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I've used Shimano Tourney ST-A070 .


and Microshift


The Microshift have a more positive shifting feel.each shift comes with a satisfying KER-CHUNK! Shimano is smoother and quieter.

I prefer the two paddle, push only shifting of the Microshift over the Shimano paddle and thumb button arrangement. However, I prefer the quieter, smoother feeling Shimano shifting.

Also, the Shimano levers look nicer and are not as huge. The Shimano build quality is a little higher than Microshift.

They are both pretty comfortable to rest your hands on -even for long rides.
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Old 06-28-18, 06:28 AM
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Thanks everyone-- I think I'll try to find some RSX shifters since they'll kind of match the other components on the bike. If that doesn't work out then I'll pick up the Microshift units.
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Old 07-04-18, 10:25 AM
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I ended up with a set of Shimano RSX shifters. Had to disassemble, clean and lubricate them and they work great now.
I'm looking at freewheels and Sunrace has a 13 - 25 and a 13 - 28 seven speed. From what I can find on-line, the RD-6208 is rated at 26 teeth max cog and a max chain wrap of 28. I've read that Shimano was conservative with their specs.

My front chain rings are 53 - 42, so I have a chain wrap of 24 with a 13-28 Freewheel. I'm wondering If I can use the 13-28.

Has anyone run a 28 tooth cog with a short cage 600ex?
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Old 07-04-18, 11:42 AM
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Originally Posted by rickrob View Post
...
Has anyone run a 28 tooth cog with a short cage 600ex?
Never had one with a short cage; still I'd be very surprised if it didn't work on a 13-28 cog set. The published specs on most RDs are very conservative compared to what they will handle IRL.
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Old 07-04-18, 11:47 AM
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Originally Posted by rickrob View Post
I ended up with a set of Shimano RSX shifters. Had to disassemble, clean and lubricate them and they work great now.
I'm looking at freewheels and Sunrace has a 13 - 25 and a 13 - 28 seven speed. From what I can find on-line, the RD-6208 is rated at 26 teeth max cog and a max chain wrap of 28. I've read that Shimano was conservative with their specs.

My front chain rings are 53 - 42, so I have a chain wrap of 24 with a 13-28 Freewheel. I'm wondering If I can use the 13-28.

Has anyone run a 28 tooth cog with a short cage 600ex?
It will either work well, or be noisy and work. If it is noisy, spend $15 on a basic derailleur and you'll have fixed that problem.
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