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  1. #1
    A Surly Maverick
    Reputation: Dr Feelygood !'s Avatar
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    Pre-2012 Fatback max tyre + rim combo and ??? MWOD Q's .

    Hi Guys,
    what is the biggest PRACTICAL (no rub) usable tyre rim combo for a pre-2012 Fatback with steel front fork please ?

    Also, what chain line issues does this throw up and how have you managed them ?

    Anyone using Surly's MWOD chainset to help ?

    Info and any Pix much appreciated

    Thanks in anticipation,
    Dr FG
    A Fatback'd Lefty for who life IS a Beach

  2. #2
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    ALU or Ti? Mine is a 2010 (ALU) and has always had "Chopper 100's" and Endos. A friend brought by a BFL the other day and we mounted it up. It was TIGHT! Didn't rub though but I didn't ride it... I may have flexed the frame into it peddling out of the saddle. Would need the MWOD for low gear for sure. Might be alright in sand at low pressures. I'm sticking with good 'ol Endos on that bike for now... they give dang good floatation on hunddies and, not only does they're tread pattern enhance floatation... it's fast on the sand. Also, like I said recently on another thread, I like the "low impact" print it leaves too. I'd like to see a BFE for sand!

    Did you buy another bike Doc?

  3. #3
    A Surly Maverick
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    Thanks Ward

    Should have said Aluminium frame.

    Yes, I've got a 2011 Large Black Alu Fatback frame winging it's way from the USA + a few other bits.

    I blame Dirt Dad for this thread :- Fatback build project

    Donkey for having another great frame for sale......... and of course you too Ward, because I've always thought you bike looked amazing with 'hundies on the beach

    I'm just obsessing over the rim/ tyre combo.

    Do I go for 80mm rims with BFL`s or 100mm rims with Larrys ?

    Max flotation on sand is the name of the game for this bike as it will be almost exclusively used for beach riding.

    Thoughts and suggestions welcome
    A Fatback'd Lefty for who life IS a Beach

  4. #4
    Dr Gadget is IN
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    I've got a 2011 Fatback with steel fork - with USC 100mm rims. Currently running BFL front (on a Lefty now, but it worked fine with the steel fork). With a Larry on the back, the chain barely clears in low/1st - and does rub a bit on the trail (keeps the dust off the sidewall)

    Tried a BFL on the back, but in low ring the chain was dragging (bent around the tire) in the 3 lowest gears. In mid ring, no problem. An MWOD should be the fix for the 100/BFL combo to run. I've got an MWOD in hand now, but can't bring myself to stop riding the bike and tear it down.
    This isn't a "you're doing it wrong" topic.

    WSS/OSS: Open Source Sealant

  5. #5
    A Surly Maverick
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    Thanks Wadester

    Any FRAME rub with the Hundie BFL combo ?
    A Fatback'd Lefty for who life IS a Beach

  6. #6
    Dr Gadget is IN
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    I recall no real issue with frame rub, and I did do at least one short ride. No direct pics, but you can kinda see here:
    Fatty Fatback BFL content
    This isn't a "you're doing it wrong" topic.

    WSS/OSS: Open Source Sealant

  7. #7
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    Is this fatty no 4 "in da house" ?
    Those chain clearances look tight if there would be mud on the tyre?
    I know you get a bit of mud flat action down there doc

    Even the Moonlander only has approx a 1/2 " (12mm) clearance in 1st...

    Moonlander by coastkid71, on Flickr

    And it`s chain was scraping mud off the tyre on the mud flats the other day,

    Kilspindie by coastkid71, on Flickr

    Look forward to pics of the new build Doc, what forks this time????
    plan it...build it....ride it...love it....
    http://coastkid.blogspot.com/

  8. #8
    A Surly Maverick
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    Hey CK, yes that will be number 4.........I think I may have a problem

    Fork will be standard steel Fatback initially

    I think I may have to loose a gear or 2 at the back, but I can live with that .

    Now just still the question remains..... what rims to get ?

    Don't want to spend a fortune but I do want W-I-D-E
    A Fatback'd Lefty for who life IS a Beach

  9. #9
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    Need to be Hundies what ever you get to get the max float out of BFLs,
    Cheaper chopper rims and drill them?
    plan it...build it....ride it...love it....
    http://coastkid.blogspot.com/

  10. #10
    A Surly Maverick
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    A Fatback'd Lefty for who life IS a Beach

  11. #11
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    High polished on a black frame! oh yeah
    plan it...build it....ride it...love it....
    http://coastkid.blogspot.com/

  12. #12
    Dr Gadget is IN
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    Quote Originally Posted by Dr Feelygood ! View Post
    Those are the same rims sold by USC - but the high polish is cool.
    This isn't a "you're doing it wrong" topic.

    WSS/OSS: Open Source Sealant

  13. #13
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    Quote Originally Posted by wadester View Post
    Those are the same rims sold by USC - but the high polish is cool.
    Yep, same rim... made by Weinman. Just remember Doc, the wide rim is every bit as important as the high volume tire is to floatation. In fact. the rim mod's came first in our quest for High Floatation. That said, the rest matters too; volume, footprint, tread design, sidewall construction, cross section (or profile)... all the variables effect all the different performance issues... floatation, traction, cornering, rolling resistance (very important in sand to the self proppeled dune buggy).... for sand, the hunddies hold the sidewalls right... period! 80's will work fine and so will 65's as we all know... but 100's make a huge difference in the sand... and snow too for that matter. If I do a BFL project, I'm thinking about trimming off some of the tread to make it more like an endo for sand riding. Tread- for self proppelled dune buggies anyway, will slow you down, cost you energy, and "saw away" at your floatation. Not really the same in snow...

    Long story short, if it's going to be a beach bike... get the 100's!!

  14. #14
    A Surly Maverick
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    Thanks Guys, frame is ' in Uk Customs' at present
    A Fatback'd Lefty for who life IS a Beach

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