Idiotic/non thinking purchases

Biggus86
Biggus86 Posts: 385
edited August 2010 in The Crudcatcher
Yes, i've made an idiotic purchase.

Got a seatpost off here, and at the same time ordered a new seat clamp.
Seatpost = 27.2
Seatclamp = 28.6
Frame thickness = 1.6mm

Thats a hell of a light bike if thats the thickness.
So i'm guessing, as i have no vernier, that it should** be 30mm or 31.8mm

Comments

  • Anonymous
    Anonymous Posts: 79,665
    make sure you dont get your diameters wrong when technicianing weapons. 30mm will not go into 7.62mm.
  • Anonymous
    Anonymous Posts: 79,665
    erm, if the seatpost outer diameter is 27.2, and the thickness of the frame material is 1.6mm, then...

    Seapots clamp size = 27.2+ (1.6*2) = 30.4
  • Biggus86
    Biggus86 Posts: 385
    why x2? Makes sence that the frame is around 3mm tho.

    Sheepsteeth, i've been through that painstakingly annoying phase of my training... tolerances of 0.02mm, a sneeze and slip of the file could RUIN... i repeat RUIN, the work :( *note got 82% and highest on course :P
  • Anonymous
    Anonymous Posts: 79,665
    Biggus86 wrote:
    why x2? Makes sence that the frame is around 3mm tho.

    Sheepsteeth, i've been through that painstakingly annoying phase of my training... tolerances of 0.02mm, a sneeze and slip of the file could RUIN... i repeat RUIN, the work :( *note got 82% and highest on course :P

    im a machinist, you dont need to tell me about tolerances but i know what you mean.
  • Biggus86
    Biggus86 Posts: 385
    just reiterating the annoyance :P
  • bannedbiker
    bannedbiker Posts: 382
    Biggus86 wrote:
    why x2?

    You're talking about diameter not radius, the frame thickness is the same all around so essentially on both sides. Hard to explain without a diagram!!!!
    Giant Reign - now sold :-(
    Rockhopper Pro - XC and commuting
    DH8 - New toy :-)
  • Biggus86
    Biggus86 Posts: 385
    yeehaamcgee wrote:
    Seapots clamp size = 27.2+ (1.6*2) = 30.4

    bannedbiker, it was frame thickness
  • whyamihere
    whyamihere Posts: 7,719
    And the frame is on both sides of the seatpost...
  • Biggus86
    Biggus86 Posts: 385
    edited August 2010
    Oh thats where he got the magic number 2 from


    Anyways spotlight off my idiocy, anyone else done anything remarkably stupid?
  • bannedbiker
    bannedbiker Posts: 382
    If you looked at a cross section of seatpost in frame, from left to right you would see frame material, seatpost material, free space, seatpost material, frame material.

    Measuring the outside diamter of the frame measures the frame thickness twice.
    Make sense?
    Giant Reign - now sold :-(
    Rockhopper Pro - XC and commuting
    DH8 - New toy :-)
  • El Capitano
    El Capitano Posts: 6,400
    sheepsteeth wrote:
    make sure you dont get your diameters wrong when technicianing weapons. 30mm will not go into 7.62mm.

    It will if you use a really big hammer... :D
    1 2 3 4 (Dead)5 6
  • Biggus86
    Biggus86 Posts: 385
    Hitting things always works!
  • Cleat Eastwood
    Cleat Eastwood Posts: 7,508
    Biggus86 wrote:
    Hitting things always works!

    Not with my schlong.
    The dissenter is every human being at those moments of his life when he resigns
    momentarily from the herd and thinks for himself.
  • GiantMike
    GiantMike Posts: 3,139
    Biggus

    Have you joined the RAFCA? Well worth it of you haven't.

    RAF MTB Champs on 19 Sep.

    Mike
  • Biggus86
    Biggus86 Posts: 385
    Cheers mike, I was going to after my training. I've tried to get on the mtb club at cosford but both the people who run it have either left the RAF or moved base, and i've asked around but not enough people intrested to get it going again, most people on base want either football or rugby.

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