I Like Big Butts, and I Cannot Lie!- Mtbr.com
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  1. #1
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    I Like Big Butts, and I Cannot Lie!

    Yep, baby got Back. I just put a BFL on the rear of my pug, on drilled Darryls. Actually I bought two BFLs, but one is defective, so I put the regular ol' Larry back on the front until I can get a replacement.

    There is plenty of clearance on both ends. In fact, I think a 100mm rim could fit but it would be very tight. Since I'm running a cassette, I wanted to keep the width somewhat in check. Next step is to get my Origin 8 Sub Compact 2x9 crank on there (22/32), and see how many gears I can run in the back. I'll keep you guys posted.
    Attached Thumbnails Attached Thumbnails I Like Big Butts, and I Cannot Lie!-1.jpg  

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    Last edited by ferrstein; 12-13-2011 at 06:04 AM.

  2. #2
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    Don't forget to put the rotors back on before you ride

  3. #3
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    Quote Originally Posted by GTR2ebike View Post
    Don't forget to put the rotors back on before you ride
    Good point. I might should also put the calipers back on the correct side of the brackets, too.

  4. #4
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    Origin 8 crank 22/32 - where to purchase??

    A friend of mine is having the same problem with a 907 - not positive it would work on that frame but I suspect it would. Currently chain lays on the tire when in granny and back three low gears - he hopes that changing the crank out would eliminate it but all the Origin 8 cranks we see for sale on the internet are gearings like 44/29 etc. - Thanks,

  5. #5
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    With my Larry's on 100mm rims, I find the widest part of the tire is just behind the indented part of the chainstays, leaving very little wiggle room. It looks like the BFL's widest point is a little further ahead. Is it within the flattened part of the stays?
    I'm covered in beer.

  6. #6
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    Quote Originally Posted by nepanite View Post
    A friend of mine is having the same problem with a 907 - not positive it would work on that frame but I suspect it would. Currently chain lays on the tire when in granny and back three low gears - he hopes that changing the crank out would eliminate it but all the Origin 8 cranks we see for sale on the internet are gearings like 44/29 etc. - Thanks,
    I just bolted up the Sub Compact 2x9 and on the Pugsley with BFLs and Rolling Darryls it looks like I can get all 9 gears when I'm in granny gear with about 1/4" to spare! . I'll post some pics as soon as I get it set up. On those Origin 8 cranks you need to swap out to the gears you want. I went with 22/32 but might have done 22/36 if I'd thought about it. Wondering if my front derailleur would swing the chain up to a 36.

    Quote Originally Posted by CLONG View Post
    With my Larry's on 100mm rims, I find the widest part of the tire is just behind the indented part of the chainstays, leaving very little wiggle room. It looks like the BFL's widest point is a little further ahead. Is it within the flattened part of the stays?
    Yes, it is pretty much in the flattened part of the stays. I'd be very interested to see if the BFLs would fit on 100mm rims. It'd be close, but it'd be awesome if it worked! For single-speed or IGH folks that would be a sweet setup! I'll take a closer pic of this area from below.
    Last edited by ferrstein; 12-13-2011 at 06:05 AM.

  7. #7
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    Quote Originally Posted by ferrstein View Post
    ... On those Origin 8 cranks you need to swap out to the gears you want. I went with 22/32 but might have done 22/36 if I'd thought about it. Wondering if my front derailleur would swing the chain up to a 36.
    BTW, this is not my idea. Milltown Cycles posted about these on their blog, where they also state that they have the cranks in stock. It is a great option for those attempting to build a "Moonlander Junior".

    Milltown Cycles: Search results for origin

  8. #8
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    Quote Originally Posted by ferrstein View Post
    I just bolted up the Sub Compact 2x9 and on the Pugsley with BFLs and Rolling Darryls it looks like I can get all 9 gears when I'm in granny gear with about 1/4" to spare! .
    I finally got off my lazy ass and finished my new wheels for my Pug. Same wheels as described above - RDs with BFLs. I added MWOD rings to my Mr Whirly and was very pleased with the resulting chain clearance. I am running a full 2x9 and in the worst combo (small ring up front - big cog in the back), the chain is over the chainstay when it passes the tire. I am not limited by my chainline. I am limited by the clearance of my chainstays. So if it fits between the stays, I can run a full 2x9.

  9. #9
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    OOOOOOOo AAAAAAAAHHHHHHHHHH!!!!!!!!!

  10. #10
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    Quote Originally Posted by nepanite View Post
    A friend of mine is having the same problem with a 907 - not positive it would work on that frame but I suspect it would. Currently chain lays on the tire when in granny and back three low gears - he hopes that changing the crank out would eliminate it but all the Origin 8 cranks we see for sale on the internet are gearings like 44/29 etc. - Thanks,
    I put those on my 2010 907 and am still able to run a BFL on the 70mm UMAII with a full cassette in back. Should be able to get them at any shop that deals with J&B Imports (the parent company for Origin 8)

    <a href="https://www.flickr.com/photos/mababo/6285733311/" title="907 Chain Clearance by Uncle Bicycle, on Flickr"><img src="https://farm7.staticflickr.com/6098/6285733311_4a8a77c8db_m.jpg" width="240" height="180" alt="907 Chain Clearance"></a>

  11. #11
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    Quote Originally Posted by SteveRice View Post
    I finally got off my lazy ass and finished my new wheels for my Pug. Same wheels as described above - RDs with BFLs. I added MWOD rings to my Mr Whirly and was very pleased with the resulting chain clearance. I am running a full 2x9 and in the worst combo (small ring up front - big cog in the back), the chain is over the chainstay when it passes the tire. I am not limited by my chainline. I am limited by the clearance of my chainstays. So if it fits between the stays, I can run a full 2x9.
    That is very cool! Based on the Salsa thread below, the BFL on a 100mm rim only grows about 3mm per side versus the 80mm rim. That means that with the MWOD rings on the stock Pugsley spindle/MWOD setup you should be able to mount BFLs and Clownfoot rims on a Pugsley, yes? For reference:

    Mukluk, Enabler, Mukluk Ti and Surly’s Big Fat Larry | Salsa Cycles

    This all makes me think that Surly must have something more in mind for the Moonlander and it's 28mm offset. While the BFLs and fat rims are certainly tight on a Pugley, it is doable. How much "extra" clearance is really needed? Perhaps a "Morbidly Obese Larry" tire is in the works that will require the Moonlander frame...

  12. #12
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    A few more pictures. I got the Origin 8 mounted up and it looks good, I still have plenty of room to spare. The chain is in a bit tighter than the chain stay, so it is still the limiting factor. I tried to take a picture as close to directly above the chain as I could. The Origin 8 crank is mounted with a Truvative ISIS bottom bracket with no spacer, per the instructions for use with an E-type front shifter.

    I took some measurements of chainline and Q-factor. I'll get them converted and post them up soon.
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  13. #13
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    Okay, here are the best measurements I could take of the Origin8 Sub Compact 2x9 with Truvative ISIS BB on my Pugsley:

    BB has a 100mm shell, 148mm spindle length. It is installed with no spacer on the drive side, with no o-ring and the Pugsley E-type derailleur in place. This is per the instructions to install the BB on the Pugsley. With the Origin8 crank bolted up, we have:

    Q-factor (outside of crank at pedal mount to the other outside pedal mount point): 215.6mm
    Half Q-factor, C/L of the frame to the pedal mount, Drive Side: 107.4mm
    Half Q-factor, C/L of the frame to the pedal mount, Non Drive Side: 108.2mm

    As you can see, the crank is actually very slightly offset to the non drive side. In the pictures above, you can see that the BB cup for the Truvative does not bottom against the frame on the non drive side (the instructions state that it won't). So... perhaps you could drift the BB a bit to the drive side with some spacers if needed. I don't need to, but I'm just saying if things get tight this is a possibility.

    Chain Line:

    C/L of frame to the C/L of the Small Sprocket: 61.8mm
    C/L of frame to the C/L of the large Sprocket: 69.6mm
    Chain Line as defined by Sheldon Brown (C/L of frame to the midpoint of the two sprocets of a dual crankset): 65.7mm

    Hope this helps. Now I gotta fashion some new fenders for this thing (my previous DIY jobs are too tight for the BFLs), and go find some sand! Or wait for snow... you get the picture.

  14. #14
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    All done - with the "Big Fat Commute" innitiation today. It's just like riding on a cloud! 15 miles on pavement with some big hills, some crushed rails-to-trails stuff, and some slimy, muddy off-road. Still waiting for some snow!
    Attached Thumbnails Attached Thumbnails I Like Big Butts, and I Cannot Lie!-pugsley.jpg  


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