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  1. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    Interesting question. The rear of the bike is now...

    Interesting question. The rear of the bike is now about 2" higher by design. This improves pedal clearance on turns. It also reduces the caster angle of the steering tube slightly. I have not noticed...
  2. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    It was a little challenging to fab and locate the...

    It was a little challenging to fab and locate the mounting tab for the brake caliper but I got it:

    https://farm5.staticflickr.com/4258/34985184122_a9223ac44c_h.jpg

    The brake works very well. So...
  3. Thread: Aluminum Scrap

    by Robert
    Replies
    14
    Views
    398

    Some pistons are forged and therefore not good...

    Some pistons are forged and therefore not good for casting. Make sure you get cast ones.
    Robert
  4. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    https://farm5.staticflickr.com/4265/34259491173_d4...

    https://farm5.staticflickr.com/4265/34259491173_d46dfe066a_b.jpg

    R
  5. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    I found this bicycle brake on eBay: ...

    I found this bicycle brake on eBay:

    https://farm5.staticflickr.com/4279/34896742172_0a4214472c_b.jpg

    The HD wheel needs and adapter to fit the brake disc:
    ...
  6. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    Thanks David: Note that the spindle ends are...

    Thanks David: Note that the spindle ends are hardened and cannot be threaded. The grinding was done with a diamond wheel.

    Ready for the road!
    ...
  7. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    Thank you! Next on to the extra long crank...

    Thank you!

    Next on to the extra long crank spindle. Here is the spindle end cut from a Shimano Dura Ace:

    https://farm5.staticflickr.com/4191/33733201053_c8f6b92f0d_b.jpg

    Here is the TIG...
  8. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    OA brazing is much easier than TIG on these thin...

    OA brazing is much easier than TIG on these thin walled tubing joints.

    https://farm5.staticflickr.com/4198/34393836560_18be058099_h.jpg
    ...
  9. Replies
    56
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    1,499

    You did not specify but I assume you are talking...

    You did not specify but I assume you are talking about aluminum. 1.5% shrink would be typical. So for your pattern you could expect 3/4 to 1" shrink in the length. I think your friend is on track....
  10. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    http://i.ebayimg.com/images/g/jmMAAOSwDiBZEtMV/s-l...

    http://i.ebayimg.com/images/g/jmMAAOSwDiBZEtMV/s-l1600.jpg

    R

    - - - Updated - - -

    Rear dropout:
    https://farm5.staticflickr.com/4188/33807931663_2afcfa6555_h.jpg

    Dropouts welded in:
  11. Replies
    152
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    8,711

    Wow! That's a bargain! Good work making this...

    Wow! That's a bargain! Good work making this happen. My experience in building stuff is that it is only worth doing if: 1. You can't buy exactly what you want. Or 2. The item is labeled "marine"...
  12. Replies
    152
    Views
    8,711

    Looks great! But I have to ask..are you saving...

    Looks great! But I have to ask..are you saving money over buying this from the manufacturer?
    Robert
  13. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    I am seriously considering an electric motor....

    I am seriously considering an electric motor. Have you seen this?
    ...
  14. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    https://farm5.staticflickr.com/4175/33794250274_9c...

    https://farm5.staticflickr.com/4175/33794250274_9c4118a46c_h.jpg

    https://farm5.staticflickr.com/4177/34251730560_8e50bc090f_h.jpg
    ...
  15. Replies
    13
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    458

    Like this?...

    Like this?
    http://www.designboom.com/cms/images/user_submit/2012/04/copy_7_7.jpg

    That was done with aluminum.

    http://www.boredpanda.com/wood-casting-aluminum-furniture-hilla-shamia/

    Zamac...
  16. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    http://i.ebayimg.com/images/g/XJgAAOSw1XdUXYg0/s-l...

    http://i.ebayimg.com/images/g/XJgAAOSw1XdUXYg0/s-l500.jpg

    https://farm5.staticflickr.com/4166/33793434593_be237cf746_h.jpg

    https://farm5.staticflickr.com/4157/33760024774_246d35dc91_h.jpg
    ...
  17. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    Funny. Everybody says that immediately. The net...

    Funny. Everybody says that immediately. The net gain is weight is about 30 lbs and really not noticeable except on very long hills. It rides fine on normal hilly terrain around Charlotte. Also, this...
  18. Thread: Fat Tire Bike

    by Robert
    Replies
    28
    Views
    874

    Fat Tire Bike

    I have been busy with a project that did not involve casting. I think you guys will like it! I posted it elsewhere during the build but I will share it here as well.

    This all started one evening...
  19. Replies
    30
    Views
    1,497

    Wheel rental places are big around here. You...

    Wheel rental places are big around here. You might try them also. They get back damaged wheels all the time.
    Robert
  20. Replies
    109
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    13,319

    Outstanding. I will be curious to see the...

    Outstanding. I will be curious to see the longevity of the carbon sheath.
    Robert
  21. Sorry. That was a bad joke after a few beers! I...

    Sorry. That was a bad joke after a few beers! I wish you success in your pursuit.
    Robert
  22. Thread: Melting Rock?

    by Robert
    Replies
    18
    Views
    841

    Jammer-Awesome shots!. R

    Jammer-Awesome shots!.
    R
  23. Replies
    16
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    1,034

    Looks great! Robert

    Looks great!
    Robert
  24. Replies
    4
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    234

    LOL! Robert

    LOL!
    Robert
  25. What size an length is you pin? Would it be...

    What size an length is you pin? Would it be acceptable to add a slight taper like a dowel pin as suggested? That would leave you with a small amount to ream or drill for finishing.

    Great video by...
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