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  1. #1
    Papa Wheelie Sigurdd50's Avatar
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    Three speed shifter (Shimano? Sturmey?)

    I am working up an 80's Peugeot MTN type bike as a winter commuter. Mounted an alloy wheel with a newish Shimano 3 speed internal hub on it (the kind with the arm... and it WORKS! Whoo hoo! I've never ever owned or ridden a 26" wheel MTN type bike, so it's a hoot for me. I have it with a 40T front chain ring, but I may scale that down to a 36T that I have... as I"ve heard the ratio on 3 speeds can be a little steep.

    Currently, for the test ride from the shop, i have it hooked up to the existing friction thumb-style shifter. Of course it's like phantom shifting with no clicks.

    Just wondering if anyone out there in C&V land has a box of 3 speed shifter thingys... or one they could spare?

    I'll mount some 1.5" tires on it, some fenders, a rack, and I"ll be ready for some crappy weather.
    Last edited by Sigurdd50; 09-21-07 at 07:16 PM.

  2. #2
    Senior Member Grand Bois's Avatar
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    You can have the grip shifter that came with my new SA three speed, but I think you have to use a Shimano shifter with a Shimano hub. I believe the amount of cable pull is different.

    I'm riding a 700c Reynolds 531 bike with a three speed for the first time and I'm loving it!

  3. #3
    Papa Wheelie Sigurdd50's Avatar
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    thanks for the offer
    I came up with a legit, Shimano trigger shifter that will work.

    (now... should I put drop bars on the MTN 3-speed conversion???)

  4. #4
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    The gearing on Shimano and SA hubs can be modified by changing the rear cog...a bigger cog will lower the overall gear range while a smaller one will increase it.

    Moustache bars would be cool.

  5. #5
    Papa Wheelie Sigurdd50's Avatar
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    speaking of cogs and chain rings.. what is the diff in changing the front chain ring to a lower tooth number vs. changing the back cog?

    Moustache bars? hmmm... I think we have something like that in the shop.

  6. #6
    feros ferio John E's Avatar
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    Quote Originally Posted by Sigurdd50 View Post
    speaking of cogs and chain rings.. what is the diff in changing the front chain ring to a lower tooth number vs. changing the back cog? ...
    In terms of pedal effort, only the gear ratio counts, i.e., 40/20 will feel the same to you as 42/21 or 38/19. However, your chain, chainring, and cog will last longer with a larger chainring / larger cog combination than with a smaller chainring and cog.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
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  7. #7
    feros ferio John E's Avatar
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    Quote Originally Posted by Sigurdd50 View Post
    ... Mounted an alloy wheel with a newish Shimano 3 speed internal hub on it (the kind with the arm... and it WORKS! Whoo hoo!
    Currently, for the test ride from the shop, i have it hooked up to the existing friction thumb-style shifter. Of course it's like phantom shifting with no clicks. ...
    For about 3 years my commuter was an old Bianchi road bike with a Sturmey Archer 3-speed coaster hub controlled by the original (friction) downtube lever. First and third were trivial to find, and I don't think I ever missed a shift into second or slipped out of it, either.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
    Schwinn: 1988 Project KOM-10, S/N F804069

  8. #8
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Quote Originally Posted by Sigurdd50 View Post
    speaking of cogs and chain rings.. what is the diff in changing the front chain ring to a lower tooth number vs. changing the back cog?

    Moustache bars? hmmm... I think we have something like that in the shop.
    Changing the front ring to a smaller one will also reduce the gearing but I also prefer to run chainring and cog combos that are as large as possible as you get better chain engagement and a smoother and longer lasting drive.

  9. #9
    Papa Wheelie Sigurdd50's Avatar
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    Changing the front ring to a smaller one will also reduce the gearing but I also prefer to run chainring and cog combos that are as large as possible as you get better chain engagement and a smoother and longer lasting drive.
    thanks for the tips!

  10. #10
    Senior Member Grand Bois's Avatar
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    I'm currently running a 52 ring and a 21 cog on my three speed Carlton. That gives me 49.7, 66.3 and 88.3 gear inches with 700cX28 tires. That's very close to stock Raleigh gearing. Some people find that gearing too steep for the hills, but I'm a grinder not a spinner.

  11. #11
    Senior Member wahoonc's Avatar
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    My general rule of thumb for cog vs chainwheel size is about 1:2 that gives you a decent combination. Any gross variation of that is prone to cause problems or accelerated component wear...eventually

    Aaron
    Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

    ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

    "Cycling should be a way of life, not a hobby.
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    Which one would you rather have under your butt at 30mph?"
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  12. #12
    Senior Member Grand Bois's Avatar
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    Quote Originally Posted by wahoonc View Post
    My general rule of thumb for cog vs chainwheel size is about 1:2 that gives you a decent combination. Any gross variation of that is prone to cause problems or accelerated component wear...eventually

    Aaron
    I don't have much experience with 3 speeds, but 1:2 sounds awfully low to me. I set mine up so that second gear is the same ratio that I'm comfortable with on a single speed. The bike was a single speed before I converted it to a 3 speed.

  13. #13
    Senior Member wahoonc's Avatar
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    Quote Originally Posted by Dirtdrop View Post
    I don't have much experience with 3 speeds, but 1:2 sounds awfully low to me. I set mine up so that second gear is the same ratio that I'm comfortable with on a single speed. The bike was a single speed before I converted it to a 3 speed.
    That is basically the way mine are set up also...

    Aaron
    Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

    ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

    "Cycling should be a way of life, not a hobby.
    RIDE, YOU FOOL, RIDE!"
    _Nicodemus

    "Steel: nearly a thousand years of metallurgical development
    Aluminum: barely a hundred
    Which one would you rather have under your butt at 30mph?"
    _krazygluon

  14. #14
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    A 52:21 gives you the same main drive gearing as a 46:18 so the ratio between the other gears would be the same as well.

    The stock gearing on an SA AW hub gives you 45, 60, and 80 gear inches and I believe that old Shimano 3 speed hubs are just a wee step higher and warrant a cog change unless you are an animal or if the drive is going on a utility bike.

    My Phillip's Twenty folder came with a 46:15 which gave it a gearing of 46, 61, and 82 gear inches (higher than my other 3 speed) and after changing the rear cog the gearing is now 38, 51, and 68. The smaller cog in the rear was to compensate for the 20 inch wheels buut this gearing was too high for a utility bike/ commuter that tends to carry a good deal of stuff and has to climb some steep hills.

    I built a three speed hybrid with a Raleigh road frame and SA 3 speed hub and it runs a 40:16 using a Shimano crank and chainring and a Shimano cog in the rear so I can run regular chain... Shimano cogs do fit on SA hubs but being narrower will require a spacer.

    3 speeds are fun to work on and for a short time my hybrid ran a 6 speed drive with a 16 and 18 tooth cog in the back and I used a Shimano road d and thumbie to handle the shifting duties... this is an easy project if you are using a modern frame.

    I'd like to see a pic of the Peugeot and here's a picsof my hybrid in full commute mode as well as a link to a thread I started to keep track of this project.



    http://forums.mtbr.com/showthread.ph...ritter+3+speed

  15. #15
    Papa Wheelie Sigurdd50's Avatar
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    Sixty Flyer --

    Thanks for the tutorial. Very useful info.
    The bike is being worked on in the earn a bike shop I volunteer at, so it is not 'nearby' where I can grab details off of. It is about 50% done, but as I've gotten thru geting the rear wheel/gearing part out of the way, the rest is window dressing (matching tires, pedals, fenders, rack).
    I had intended to bring a digi-cam to the shop yesterday when I worked on it, but I forgot it at home, so no progress pics. I will grab some when I can.

    I'm not settled on what kind of tires (26 x 1.5) I want on there. It is Wisconsin (Madison) but realistically, I won't be plowing thru heavy snow too often; even the commuter bike paths get cleared during snow events. I'm leaning towards a modest tread. Suggestions?

    thanks!

  16. #16
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    My winter bike (a fixed mb) is running some Schwalbe Hurricanes (26 by 2 semi slick) that have already proven themselves on the street, trail, and singletrack and also have a second wheelset (26 by 1.75) with a studded front tire and more aggressive tread in the rear in case things get glassy.

    Many folks here run road slicks in the winter and have no complaints and swear that this is the best way to go... a modest tread with a good tire compound should work well.

    Armadillos are always a good choice as they come is a wide range of sizes and tread patterns and are also fairly bulletproof.

  17. #17
    Senior Member Grand Bois's Avatar
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    Here are some shots of my newly-finished '59 Carlton if you're interested.

    http://community.webshots.com/album/560796524cQRWSB

  18. #18
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Dirtdrop -

    Interested ?

    I think I am in love with your bike... she's gorgeous !

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