MacMahone frame that doesn't work (without flex).
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MacMahone frame that doesn't work (without flex).
26 Comments
  • 1 0
 The guy has made the top circle too big. because of the angle the top circle should finish smaller but this dude has extended to the outside of the seatstay which is most probably an inch tick and thus messes up the diagram. and besides that the frame wouldnt just flex it eiter bend and stay bent or just snap...... sorry just thought id point out.
  • 0 1
 You're wrong, but I don't feel that it's worth it to explain the whole thing to you. Read the comments.
  • 1 0
 yes, the stays flex... AND A TON of companies have done it before! the idea being to keep things simple in most cases. Hell, even tomac uses flex stays these days. check out the carbide and it flexes Smile
  • 0 1
 I'm just saying it flexes - no breaking claim here.
  • 1 0
 the picture wasn't taken perpendicular to the frame, so wouldn't that render your circles inaccurate? i do see how it "doesn't work" though.
  • 0 0
 Sure, but the circles are there just to give you the right idea. They can't meet and have the same path.
  • 1 0
 uuurrgh! relying on flex in the ali to make it work! horrid. that would make the shock only react as fast as the frame can flex, completely alter its characteristics.
  • 2 0
 you really need a picture of the bike not on an angle to get an accurate idea. that could really change things
  • 0 1
 Uhm . . angles don't change the fact that the paths are circles. Two circles cannot intersect in more than two points, so either the link or the rear triangle has to bend. If you don't understand, I'm sorry.
  • 3 0
 but on an angle the path wont look like a circle, it will look like an oval
  • 0 4
flag Hombre3000 (Jan 19, 2009 at 8:46) (Below Threshold)
 The path will always be a circle, but the picture isn't exactly from the side of the frame. I know you don't get it - that's okay. Just stop trying.
  • 3 0
 Yes the paths will always be circles, your not telling me anything new. On an angle though a circle does not look like a circle, it looks like an oval. Also, your insults do nothing to make you look more intelligent, they just add to the immaturity that has driven a lot of people away from this otherwise good site. Have you seen me insult you any even though i don't agree with you?
  • 0 1
 Of course it's not new, but it seems new to you because you don't seem to understand it. Ok, from an angle, it looks like an oval. Big whoop. The frame isn't built at an angle, this picture is here not to demonstrate the exact paths but to show that they are, in fact, circles. I'm not insulting you, I'm just saying you don't get it, and believe me - I'm not the demographic that pushes people away.
  • 0 0
 Yes, i'm stupid. It's probably because I can't see the picture. Why wont it work? Unless that's just a normal bb at the bottom and not a pivot...?
  • 1 0
 No, it's a pivot, but those circles show the path of the link and the path of the rear triangle. The paths have to be the same because they both attach to each other, but the paths are different. That means that something has to flex so that they can still be attached.
  • 0 1
 Aha! I see now, why didn't I see that earlier Blank Stare Is this frame company a decent one, like a legit company?
  • 0 0
 Not sure. I've only seem them online, never a frame in person.
  • 1 1
 isnt there two large bearings on the outside of the bb which allows the rear triangle to pivot on that?
  • 1 1
 I think someone posted that already.
  • 0 0
 But Stupid none-the-less.
  • 0 0
 I was so angered with that thread, and the idiots who didn't understand it. I simply did not make a drawing explaining that. Thanks.
  • 0 0
 The idiot, singular.
  • 0 0
 Link to thread?
  • 2 0
 Well, this is Pinkbike, there is probably at least 20 other kids who don't understand why it doesn't work as well. Never underestimate stupidity.
  • 0 0
 Davemud is the person in question
  • 0 0
 looks pretty sketch.







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