Friction shifters with a ratchet mechanism for braze on downtube.

GuyBoden

Veteran
Location
Warrington
I'm looking at getting another pair of Friction shifters with a ratchet mechanism for braze on downtube. (Indexed with Friction option will be fine.)

I already have Simplex Retrofriction, Shimano SIS, Suntour Power shifters.

Thanks, any suggestions?
 
Campagnolo Doppler from the early Chorus 7 speed era?
 
OP
GuyBoden

GuyBoden

Veteran
Location
Warrington
This rings a bell, have you posted the same on Retrobike?
Yes, and I have been rightly corrected that the Simplex Retrofriction are not Ratchet mechanism, but spring clutch.

Campagnolo Doppler from the early Chorus 7 speed era?
Thanks and obviously Campagnolo C-Record Retrofriction.
retrofriction.jpg


Edit: Also I have read that Shimano Unishift have a similar clutch mechanism to Simplex Retrofriction.
21827D5F-5EA2-49AB-9E53-0E09E708C897.jpg
 
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GuyBoden

GuyBoden

Veteran
Location
Warrington
Suntour Accushift
Yes, I have an old pair of plastic Suntour Accushift, but the friction mode doesn't function, the later version SL-IP00-B, that were sold as Sprint / Superbe Pro / Cyclone 7000 are reviewed as being very good.

6B5CDBB9-5691-4CC4-B3CC-571ED3031CB1.jpg
 
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GuyBoden

GuyBoden

Veteran
Location
Warrington
Microshift produce a range of friction shifters with a ratchet mechanism, their MTB specific shifters work with the new Shimano MTB 10 speed rear derailleurs, which have a longer cable pull than a normal downtube shifter can usually achieve.

Microshift Barend BS-M10 also work with Shimano 10 Speed MTB derailleur. I believe that the shifter part can be used as a downtube shifter.
https://www.microshift.com/models/bs-m10/


BS-M10-600x600.jpg
 

T4tomo

Guru
Microshift produce a range of friction shifters with a ratchet mechanism, their MTB specific shifters work with the new Shimano MTB 10 speed rear derailleurs, which have a longer cable pull than a normal downtube shifter can usually achieve.

Microshift Barend BS-M10 also work with Shimano 10 Speed MTB derailleur. I believe that the shifter part can be used as a downtube shifter.
https://www.microshift.com/models/bs-m10/


View attachment 615033
The also do a road version the BS-R10. I have one on my gravel bike, playing nicely with a shimano 105 RD. I have never run it in friction mode though, as it works so well indexed, nor have I tried to fix it onto a downtube boss.

If you flick through the technical docs you can order a bolt kit, which would then tell you whether it would fit your existing bosses, if that is the crux of this thread following your comments on the other thread on friction shifters.
 
OP
GuyBoden

GuyBoden

Veteran
Location
Warrington
The also do a road version the BS-R10. I have one on my gravel bike, playing nicely with a shimano 105 RD. I have never run it in friction mode though, as it works so well indexed, nor have I tried to fix it onto a downtube boss.

If you flick through the technical docs you can order a bolt kit, which would then tell you whether it would fit your existing bosses, if that is the crux of this thread following your comments on the other thread on friction shifters.
How is the quality and functionality compared to a good quality shimano shifter?
 

T4tomo

Guru
How is the quality and functionality compared to a good quality shimano shifter?
It looks and feels really solid and changes perfectly / indexing is spot on. I haven't had a Shimano bar-con to compare with, but its strikes me that it would be difficult for it to be much better. I had it out for some reason or other, and it was dead easy to replace and set up again.
 

T4tomo

Guru
Is "ratchet" the right word? Surely with a ratchet you'd only be able to change in one direction.
get a pair and try them, I assure you they work in both directions:laugh:

suntour power ratchet, for example frictioned against the cable tension, but ratcheted as you released tension, which help you be more precise and controlled on the downshift (or upshift) whichever you consider it.

don't ask me how they work, but they do.
 
OP
GuyBoden

GuyBoden

Veteran
Location
Warrington
Is "ratchet" the right word? Surely with a ratchet you'd only be able to change in one direction.
The Suntour Power shifter has a small cog, which a hardened piece of steel spring that fits into, that creates the ratchet, this allows the shifter to moves along each tooth of the cog in both directions, but only ratchets on the way down not on the way back up. I still have a few Suntour Power shifters in the garage.

See parts 11 cog (ratchet wheel) and 6 steel spring in the diagram below.

suntour-power-shifter-diagram-png.png



Single NOS Suntour Power Shifters are still available for £15+PP here:
https://bankruptbikeparts.co.uk/pro...-frame-fit-28-6mm?_pos=1&_sid=87bbbaa53&_ss=r
 

Dogtrousers

Kilometre nibbler
I don't doubt that they work. It's just the word "ratchet" that's bugging me. "a device consisting of a bar or wheel with a set of angled teeth in which a cog or tooth engages, allowing motion in one direction only."

Just my little joke.
 
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