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  1. #1
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    UMA 90mm on Pugsley -- can it be done?

    I am new to fat biking, in fact, so new I haven't ridden one yet. I am, however, building a fat bike. This is what I do--I get ideas and I run with them. I scored an essentially brand new pugs frame and managed to pick up some 90mm UMA rims that are offset (12mm) drilled. Boy they sure do look big in this frame and fork!

    The questions is: if I build up the wheels, will they fit? If so, with what tires? I will be building the wheels (and the entire bike) myself.

    I tried to search but couldn't find anything conclusive at all. Any help would be appreciated!

  2. #2
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    I should add that my concern is purely whether they will fit the frame and fork. I will figure out the drive train stuff. My plan is to either run single speed or 1 x 10

    Sent from my SPH-L720 using Tapatalk 4 Beta

  3. #3
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    Re: UMA 90mm on Pugsley -- can it be done?

    Yep, I believe people have run 100mm rims with Nates.

  4. #4
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    Quote Originally Posted by ultraspontane View Post
    Yep, I believe people have run 100mm rims with Nates.
    What?!!!! I'd like to see that!!
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  5. #5
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    Re: UMA 90mm on Pugsley -- can it be done?

    Quote Originally Posted by Lone Desert Walker View Post
    What?!!!! I'd like to see that!!
    http://fat-bike.com/2011/11/dear-nate-i-love-you/

  6. #6
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    hmm wait.. so 100mm rims fits in the pugs!?!? why the moonlander then? Assuming I'm not riding through soft mud...

  7. #7
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    Quote Originally Posted by boogman View Post
    hmm wait.. so 100mm rims fits in the pugs!?!? why the moonlander then? Assuming I'm not riding through soft mud...
    Thats a hundie with a 3.7, I'm sure it barely fits. none of the big casing tires will fit in a pug on that rim though. BFLs on 80s probably have the same clearance, I'd rather have less rim and more tire with the same clearance.
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  8. #8
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    So I could probably fit nates?

    Sent from my SPH-L720 using Tapatalk 4 Beta

  9. #9
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    I have BFLs on RDs front and rear on my Necro. I think it is either/or for fit of a big tire with skinnier rims(Marge Lites or RDs) and clearance vs CS with 3.8s. I like the versatility of the RD rims on a Necro myself. Planning on getting a Nate soon, BFLS spun out on me in a race I just did...cost me first place!
    Suckage. But I assumed I was gonna be dead last anyways, so I shocked myself on how well the bike did.
    2010 Surly Conundrum
    2012 Pugsley
    2012 Felt Brougham
    2013 Salsa Colossal
    2013 All City Nature Boy
    2014 Big Dummy

  10. #10
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    Quote Originally Posted by Nakedbabytoes View Post
    I have BFLs on RDs front and rear on my Necro. I think it is either/or for fit of a big tire with skinnier rims(Marge Lites or RDs) and clearance vs CS with 3.8s. I like the versatility of the RD rims on a Necro myself. Planning on getting a Nate soon, BFLS spun out on me in a race I just did...cost me first place!
    Suckage. But I assumed I was gonna be dead last anyways, so I shocked myself on how well the bike did.
    Just a note - I have found the profile of a 4" tire on 82mm rims wasn't as nice for turning as the same tire on 65mm rims. I got a set of BFLs for the 82mm rims to get back the rounded tire profile.

    This was on dirt. On sand or snow the tire may perform differently.
    Safe riding,

    Vik
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  11. #11
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    I'll never fit a bfl... anyone think a 4" like a husker will fit?

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  12. #12
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    Quote Originally Posted by vikb View Post
    Just a note - I have found the profile of a 4" tire on 82mm rims wasn't as nice for turning as the same tire on 65mm rims. I got a set of BFLs for the 82mm rims to get back the rounded tire profile.

    This was on dirt. On sand or snow the tire may perform differently.
    Thanks vikb, yeah I could see that. My Endos look like a Caddy Excalade with 22s on RD rims, they definately spread that tire out! And the endo was pretty flat profile anyways! I need something that grips better though(maybe a HuDu?) as I spun out on hills more than once and had to run up them instead(powdery dirt). Normally, I find BFLs or Endos to be pretty good 90% of the time I am riding. But I do need a rear that grips better for steep hills.
    2010 Surly Conundrum
    2012 Pugsley
    2012 Felt Brougham
    2013 Salsa Colossal
    2013 All City Nature Boy
    2014 Big Dummy

  13. #13
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    I've got some bfl tires coming and will report back on frame and fork clearance with the uma 90mm rims shortly.

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  14. #14
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    I've run Endos and Larry's on 100mm chopper rims for a long time now. They barely fit, but the profile of the tire is super flat which is nice in soft sand and barely-tracked snow. That's where I usually ride. My guess is that the 4.7's on narrower rims will be a bit rounder and taller, which might be better for really rough tracks and summer riding as well as soft surfaces. If I had to choose new wheels I'd probably flip a coin.





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  15. #15
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    That is a handsome looking bike with the contrasting silver parts and rims on the black Frame.

    Sent from my SPH-L720 using Tapatalk 4

  16. #16
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    No ride reports for a bit too come, but the initial mounting has them fitting!

    Sent from my SPH-L720 using Tapatalk 4

  17. #17
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    UMA 90s with BFLs may actually fit but would have almost no clearance.

    I got Clown Shoes and BFLs on my Pug but it took a little convincing:

    Clown Shoe + BFL + Pugsley = Fatties Fit Fairly Fine

  18. #18
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    The fit and ride just fine. Clearance is tight, but many trail miles at 9psi and no issues.

    Sent from my SPH-L720 using Tapatalk 4

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