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  1. #1
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    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!

    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!
    Attached Thumbnails Attached Thumbnails 2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!-2014-design-logic-bikes-small-da-phat.jpg  


  2. #2
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    Interesting and innovative rear triangle ... What's the frame weight ?

  3. #3
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    it's around 13 lbs

  4. #4
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    A bit on the heavy side ... But it sure looks like you could haul some weight around.
    A good excursion bike, for sure.

  5. #5
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    Very interesting! Thanks for sharing.

  6. #6
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    Quote Originally Posted by bikeabuser View Post
    Interesting and innovative rear triangle ... What's the frame weight ?

    Looks more like a rear hexagon or pentagon to me….
    My motorcycle runs on infant blood

  7. #7
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    Looks like some serious toe overlap possibility.
    A bike by any other name is still a bike.

  8. #8
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    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!

    Yeah, looks pretty short....and heavy. Different though, pretty cool.

  9. #9
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    Just don't get it, most of the rear end appears to be under shear load, not compression. This would require seriously heavy tubing to compensate.
    The piece of tube from the rear rack to the seat tube is the weakest link.
    It could easily be improved by lengthening the seat tube so that the rear rack can meet it directly, and allow the tube from the rear axle to meet closer to the seat tube as well.

  10. #10
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    What was/is your logic behind your design that you are trying to accomplish over conventional designs?

    A little more info about yourself and your idea would enable others to provide the proper feedback that you are looking for.

    I can see an attempt to combine the seat stays and rack frame into one system...

    As to the toe overlap question...is the bottom bracket wide enough to render it a non issue?

    BFL's...good!
    Just like Fat Bikes...the posters on here can go anywhere...and do.

  11. #11
    Nemophilist
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    Well...

    Not that we have full information, but I'm searching for the logic and not really finding it. Not to be a poo, but...

    My first frame, made of straight wall .035 CroMo, XXL in size with a 1193mm WB and over 12' of tubing, weighs 6lbs-10. The rack I made that approximates the cargo capacity you have here probably weighs under a pound. The entire bike sans rack with 27TPI tires and Surly tubes weighs 39lbs. Subtract my frame weight and add yours and it weighs 45lbs?!?!

    Scratching head.....
    Most people ply the Well Trodden Path. A few seek a different way, and leave a Trail behind.
    - John Hajny, a.k.a. TrailMaker

  12. #12
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    2014 Design Logic "Da-Phat" pix
    Attached Thumbnails Attached Thumbnails 2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!-2014-design-logic-bikes-da-phat-5.jpg  

    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!-2014-design-logic-bikes-da-phat.jpg  

    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!-2014-design-logic-bikes-da-phat-6.jpg  

    2014 Design Logic Bikes small custom "Da Phat" fresh out of the lab!-2014-design-logic-bikes-da-phat-7.jpg  


  13. #13
    Laramie, Wyoming
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    Paint it camo and sell it to the military.

  14. #14
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    It's like a short fat Surly Dummy, looks cool!!

  15. #15
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    At that weight, it looks like the OP is trying to compensate for lack of good rear tubing geometry with sheer brute tubing beef. Where it differs hugely from the Surly Dummy and all other mainstream cargo bikes is that it does not have a triangulation of tubing to distribute force efficiently. Or so it appears. Just my 1.5 cents. Sorry if I'm peeing in somebodies cheerios.

  16. #16
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    I finally figured it out... I knew I had seen something similar before.

    The design appears to be borrowed from the "Yuba Boda" a bike also marketed as a cargo carrier and also neglects the traditional rear triangle in favor of an integrated rack.
    Given that this forum is a mountain bike forum not a randonneuring forum, it's easier to understand why people would question the design's ability to hold up to trail riding.
    If the intent was never to leave flat ground and perform similar hauling duties to the Boda bike it now makes alot more sense.

  17. #17
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    Actually searched the Yuba Boda on Yahoo images.... It has a triangulation member in the rear of the bike keeping the truss design. It does have the integrated rack though along with the standard seat stay of sorts.

  18. #18
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    It's a first effort, and to be encouraged.

    I'd prefer to see a more laterally stiff design for this purpose but it's good to see someone making an actual fat cargo bike. The extra weight will become irrelevant once it's properly loaded up.

    There's more to cycling than getting your wheels off the ground.

    (I'm speaking as someone who would buy a fat cargo bike.)
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  19. #19
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    I agree Velobike, it is a commendable first effort. It's great to see someone venturing outside the box and making a fat cargo. Really cool. Just add a triangulated seat stay in there and I'm thinking "woohoo!"

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