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Thread: Birdy thread

  1. #451
    jur
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    Quote Originally Posted by ninox View Post
    Hi Jur,
    So I was having problems with front wheel bobbing while climbing and there are some 1km sustained climbs on my commute (and conversely an awesome downhill on the way home). I bought the Multi-s and the new shock has fixed that. I do think this shock (multi-s) performs better and if my Birdy was stolen I would get one for my bike again. But that's me. For the rear I prefer the standard shock as I am not sure there is any suspension in the multi-s shock rear. Nada. Nothing. Feels hard as a rock
    I think you did well with the multi-s, which does not reduce the amount of travel like the colour+ does. The only downside is the varying pitch spring. The ideal solution is to get a spring for your weight. The varying pitch version caters to a wide range of weights at the cost of reduced travel.

    Regarding the bobbing, this is a very interesting question. I puzzled a long while where the energy might be going when you stand on the pedals. I worked out it actually goes back into pedalling. The effect of front suspension is to spread the bounce produced by the body going up and down over a pedal stroke. Some may be lost but I think most is recycled. Riders think it feels lossy but the reality is less loss than thought. If there is significant damping in the suspension, then some more is lost.

  2. #452
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    Quote Originally Posted by ninox View Post
    I had some problems with the capreo shifting which is why I modified my Birdy. The follow up will be described in the Birdy Modifications Problem thread posted here. I spent a fair amount of time monitoring my gearing used while riding the Birdy and then used Sheldon Brown's gear calculator to work out what I wanted. It hasn't been entirely feasible but the bottom line is that my new group set shifts so much better than the capreo ever did, especially when trying to find an easier gear. But the capreo is fabulous in its way, a compact solution to providing decent gain ratios for small wheeled bikes and I would really like Shimano to continue to develop it with ultegra level components and 10 or 11 speed system.
    i will try to put more kms on the capreo and see if further adjustments on the RD can fix the shifting problem. if not, i will most likely change to a 105 (never had problems on my other bikes) or ultegra (first time to use if ever).

    yes, you are right about the capreo. it is perfect for small wheeled bikes like the birdy. the ratios are just right for the birdy.

  3. #453
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    Quote Originally Posted by bluebirdy View Post
    A Birdy with niggly little design faults! I can't believe that!
    but really even though Ive been so aggravated by the little things that need changing on my Birdy blue (old style) I would buy another without hesitation! I Love the damn thing, Its so comfortable, fast, quirky and does Everything I could ask of it except fold without damaging itself!
    Attachment 377779Attachment 377780Attachment 377781
    trekking bars/ home made rack/ polycarbonate guide

    pics added of some of the changes I have made so far!
    i already injured my bike when folding. i guess that's how it is.

  4. #454
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    I covered mine in rhino skin vinyl but the sharp edges of the stem and other bits and pieces chew through it in no time! Its dissapointing, my wife's giant halfway clips safely together and hasn't gotten a scratch! With the trekking bars on I can position the seat to bump up against bars, stopping any further damage.

  5. #455
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    Birdy Multi-S suspension

    Quote Originally Posted by jur View Post
    I think you did well with the multi-s, which does not reduce the amount of travel like the colour+ does. The only downside is the varying pitch spring. The ideal solution is to get a spring for your weight. The varying pitch version caters to a wide range of weights at the cost of reduced travel.

    Regarding the bobbing, this is a very interesting question. I puzzled a long while where the energy might be going when you stand on the pedals. I worked out it actually goes back into pedalling. The effect of front suspension is to spread the bounce produced by the body going up and down over a pedal stroke. Some may be lost but I think most is recycled. Riders think it feels lossy but the reality is less loss than thought. If there is significant damping in the suspension, then some more is lost.
    Here are some photos of the multi-S suspension if anyone is interested. Here is the front:
    multi-s 1.jpgmulti-s 2.jpg
    and here is the rear - several photos showing it taken apart and what it looks like put together. Basically I think this is an over-engineered polymer. Maybe I should try it again some time?

    multi-s 1 (1).jpgmulti-s 2 (1).jpgmulti-s 3 (1).jpgmulti-s 4 (1).jpg

  6. #456
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    Quote Originally Posted by bluebirdy View Post
    Attachment 377779Attachment 377780Attachment 377781
    trekking bars/ home made rack/ polycarbonate guide

    pics added of some of the changes I have made so far!
    Pretty impressed with your rack.

    edit: this could be misinterpreted - it refers to bluebirdy's home made mod.
    Last edited by ninox; 05-09-14 at 07:11 AM. Reason: Misunderstanding

  7. #457
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    Thanks, I would have love to TIG weld it but no longer have access to one, of course it is based on the Birdy expedition rack idea but with the dimensions tweeked to provide a stable stand when folded, the bike rests on the stand and the rear guard stay once folded! The bamboo was taken off a new broom handle I bought for my workshop broom! The best bit was that it cost about $30 !

  8. #458
    Nobody mconlonx's Avatar
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    Noticed a loose headset this AM on the way into work, just fixed it at lunchtime.

    Upside-down headset design. Interesting... Hadn't really noticed it before. No safety tabs for the QR wheel -- nice.

    Also, lubed my chain. Bike needs a wash.
    I know next to nothing. I am frequently wrong.

  9. #459
    Nobody mconlonx's Avatar
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    Finally installed the Sachs Dual Drive 3x7 wheel.

    Shimano mtn shifters:


    Here's the setup out back. No cable stop, so I drilled the singarm and filed a frame stop flat to bolt it on:


    Close up of the cable stop. The wall of the swingarm wasn't thick enough to thread, so there's a nut on the inside:


    I also swapped the stock cassette on the Dual Drive out for the stock cassette off the regular 7sp Birdy for more range. There's a bit of slack with the hub shift cable -- the Harris Cyclery website references a cable tensioner potentially available through Bike Friday, but unless the slack becomes an issue I probably won't even bother.

    Nice to have the extra range.
    I know next to nothing. I am frequently wrong.

  10. #460
    Senior Member bhkyte's Avatar
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    Quick question.
    What's the wide tyre options for a birdie.
    I tend to fit 1.5 marathons, would anything wider fit?

    Just added a used red birdie 8 speed to my stable, running like clockwork. :-)
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8. Birdie red.

  11. #461
    jur
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    mconlonx: that looks excellent!

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    after more kilometers put on the birdy, and several adjustments, the capreo works perfectly now.IMG_2932.jpgIMG_2934.jpgIMG_2935.jpgIMG_2933.jpg

  13. #463
    jur
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    Quote Originally Posted by marxmini View Post
    after more kilometers put on the birdy, and several adjustments, the capreo works perfectly now.IMG_2932.jpgIMG_2934.jpgIMG_2935.jpgIMG_2933.jpg
    Very sharp looking setup! In fact, did you ride those "more km" in a cleanroom or something?

  14. #464
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    Quote Originally Posted by jur View Post
    Very sharp looking setup! In fact, did you ride those "more km" in a cleanroom or something?
    ha ha :-) the bike has around 100kms now. i did the first adjustment at 20km, then 60km, then 80km. it shifted perfectly after the third adjustment. it goes up and down gears 5-7 without a hitch. :-) i learned a lot from the discussion on the capreo here and i applied them to my own bike when necessary.

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    i am now considering the multi-s front suspension for my bike. most of the reviews are positive. :-)

  16. #466
    Nobody mconlonx's Avatar
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    Quote Originally Posted by jur View Post
    mconlonx: that looks excellent!
    It was in my truck in the apt in town, about 1/4 mi away from the shop, so I backpacked parts in with me, swapped things out at work (slow day), and took a longer way home. Front shifting is reversed, which led to much hilarity on a short, steep hill...

    I have yet to use it on my regular commute, but so far, love it. Totally overly impressed with my cable stop problem solving/kludge. I actually did notice the extra weight, hefting it around, but riding it on the streets, the extra weight was negligible, and the lower/higher gearing appreciated, more than makes up for any extra weight.

    There's this one hill on the bus to office end of my commute where I wished for lower gears getting to the bus; wished for higher gears doing the reverse commute. No real big deal, could absolutely live with the stock 7sp gearing for what I'm using it for, but now I'll have better gearing at the extremes.

    I believe Bruce Metras told me that he regularly only used the 3sp shifter for a majority of his travels with a Dual Drive system. And BTW, thanks for the Birdy and the Dual Drive setup, Bruce!

    Motivation is change of location, my 6mi commute to the bus station will change to a 12 mi ride to the bus with the move from one town to a couple towns over. More, steeper hills involved. Co-worker (boss) at the shop, observing work going down on the bike, asked if I was going to ride this 12 mi, across the state border to do the bike bus bike commute -- "Well yeah, that's partly why I'm rigging this up now." Duh.

    He and motorhead friend expressed incredulousness. He's about my height so I said, Take it for a ride... Not that he's running out to get a Birdy or a folder, but he was duly impressed with the handling and gearing on the bike, acknowledged that it might be OK-ish for the interstate commute.

    No, it will rock.
    I know next to nothing. I am frequently wrong.

  17. #467
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    Quote Originally Posted by mconlonx View Post
    Finally installed the Sachs Dual Drive 3x7 wheel.

    Shimano mtn shifters:


    Here's the setup out back. No cable stop, so I drilled the singarm and filed a frame stop flat to bolt it on:


    Close up of the cable stop. The wall of the swingarm wasn't thick enough to thread, so there's a nut on the inside:


    I also swapped the stock cassette on the Dual Drive out for the stock cassette off the regular 7sp Birdy for more range. There's a bit of slack with the hub shift cable -- the Harris Cyclery website references a cable tensioner potentially available through Bike Friday, but unless the slack becomes an issue I probably won't even bother.

    Nice to have the extra range.

    You dont kick the IGH shift cable pedaling?

  18. #468
    Nobody mconlonx's Avatar
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    Quote Originally Posted by fietsbob View Post
    You dont kick the IGH shift cable pedaling?
    Nope. Not even close. Size 42 shoes and I tend to have a heel-in gait. The second picture greatly exaggerates the angle out from the bike -- most of it is drop from the cable stop to the axle. If it was an issue, I would bolt a pulley to the rear of the swingarm.
    I know next to nothing. I am frequently wrong.

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    i must be crazy. i got myself another pre-owned birdy (japan version peugeot).

    i am thinking of recreating the 10th anniversary birdy. drop bars. 20 inch wheels. capreo. 105. :-)
    Last edited by marxmini; 05-13-14 at 02:02 AM.

  20. #470
    Nobody mconlonx's Avatar
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    Quote Originally Posted by mconlonx View Post
    Here's the setup out back. No cable stop, so I drilled the singarm and filed a frame stop flat to bolt it on:
    Don't do this mod. The cable stop runs into the chainring, or at least the plastic guard on the inside, and will not allow for a proper fold.

    Back to the drawing board...
    I know next to nothing. I am frequently wrong.

  21. #471
    Part-time epistemologist invisiblehand's Avatar
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    Quote Originally Posted by bhkyte View Post
    Quick question.
    What's the wide tyre options for a birdie.
    I tend to fit 1.5 marathons, would anything wider fit?

    Just added a used red birdie 8 speed to my stable, running like clockwork. :-)
    I rode a Red Birdy with Big Apples. Can't tell you which width.

  22. #472
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    What would be the first sets of upgrades for a stock birdy for performance? Road tires, sise? Chainrings?

  23. #473
    Senior Member bhkyte's Avatar
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    Tyres. Fit kojaks,

    Mconloux. Are you considering running the dualdrive through the chainstay now?
    What set up is on the touring dualdrive birdie for this?
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8. Birdie red.

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    Quote Originally Posted by simisimi View Post
    What would be the first sets of upgrades for a stock birdy for performance? Road tires, sise? Chainrings?
    kojak tires. remove fenders (if you have them). later on you may want to upgrade the gear train, brakes, suspension.

  25. #475
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    Quote Originally Posted by mconlonx View Post
    Don't do this mod. The cable stop runs into the chainring, or at least the plastic guard on the inside, and will not allow for a proper fold.

    Back to the drawing board...
    Don't know if this will help, but here are are a couple of pictures of my old Dual Drive Birdy.. I think you're halfway there!
    Attached Images Attached Images

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