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  1. #1
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    Lightest Fatbike

    Who thinks they've got the lightest Fatbike out there? How light can you get with these beasts and how I'd you get there? Just curious. Oh, and these should be real-world weights unlike those many manufacturers choose to list!

  2. #2
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    Yes please, let's see them!



    Weight 907 SS 26.74lbs

    Joke was I built this 907 up for a 24 hour race (BFs were temporary), but I ended up using my Pugsley in full dress mudguards etc, and I think it weighed over 40lbs in race mode.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  3. #3
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    Quote Originally Posted by Velobike View Post
    Yes please, let's see them!



    Weight 907 SS 26.74lbs

    Joke was I built this 907 up for a 24 hour race (BFs were temporary), but I ended up using my Pugsley in full dress mudguards etc, and I think it weighed over 40lbs in race mode.
    Velocity p35 rims or something? Those rims look tiny.
    Try this: HTFU

  4. #4
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    Quote Originally Posted by rockcrusher View Post
    Velocity p35 rims or something? Those rims look tiny.
    Bought in Australia - Dice 40mm Two Six. Popular with the DH riders about 10 years ago (been using that set of rims on various hubs for 8 years and they're still perfect). Rim weighs 790gms.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  5. #5
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    Only girls need to be concerned about a light fat bike.

    (my pugs is 32.5 pounds)

  6. #6
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    Quote Originally Posted by deuxdiesel View Post
    Only girls need to be concerned about a light fat bike.

    (my pugs is 32.5 pounds)
    I'm of two minds here.

    Heavy fat bikes plow over whatever! Woo! My heaviest was more than 40 lbs.

    Heavy fat bikes are hard to carry and throw over large things =/
    Disclaimer: I run Regular Cycles (as of 2016). As a profiteer of the bicycle industry, I am not to be taken very seriously.

  7. #7
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    Agreed on the momentum issue. My wife's Wednesday weighs 36 with the Lefty, but I'm going to make a concerted effort to drop that significantly. To put it into perspective, my Pugs weighs 20% of my body weight, hers is 30%. If I can get to 30 (without the lefty) on hers without going too crazy, I'll be happy.

  8. #8
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    28.5# 907 with real wheels :-) lol
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  9. #9
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    This was just to see what we could do with the parts we had.
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-resize.jpg  

    Speedway Cycles owner http://fatbackbikes.com

  10. #10
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    Oh my, those are nuts! How light are they if you remove the tubes and tires?
    2012 Intense M9
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    2007 Custom Litespeed Sewanee

  11. #11
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    Quote Originally Posted by thirstywork View Post
    This was just to see what we could do with the parts we had.
    That's impressive, especially with gears.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  12. #12
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    Quote Originally Posted by Velobike View Post
    That's impressive, especially with gears.

    What really surprised me with fat bike parts is how not heavy the wheels and tires actually are. I compared my built up Hope Pro2 with DT Comps 3x to Sun Ringle MTX33 29 rims (a hefty freeride rim) with Panaracer Rampages and WTB Dissents on it and it came within 2lbs of the Marge DH built to a Surly new hub with 14g spokes, rim strip, Larry Tire and a Surly Tube. If I chose to build up my own wheel i could easily get it lighter to where the weight difference is possibly negligible. Rubber always weighs less than metals. I would like to build a Marge lite to a Paul WHUB with DT competition or even Sapim spokes and run that tubeless. Bet it would be really close to my 29er front wheel.
    Try this: HTFU

  13. #13
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    Quote Originally Posted by thirstywork View Post
    This was just to see what we could do with the parts we had.
    That will be a rough ride with no pedals but you could definitely get it lighter with some ww parts. Can't believe it's that with full gears

  14. #14
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    Like it, my Muktard Susitna setup weighs 46 loaded up, or twice Thirsty's experiment.

  15. #15
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    Quote Originally Posted by rockcrusher View Post
    What really surprised me with fat bike parts is how not heavy the wheels and tires actually are. I compared my built up Hope Pro2 with DT Comps 3x to Sun Ringle MTX33 29 rims (a hefty freeride rim) with Panaracer Rampages and WTB Dissents on it and it came within 2lbs of the Marge DH built to a Surly new hub with 14g spokes, rim strip, Larry Tire and a Surly Tube. If I chose to build up my own wheel i could easily get it lighter to where the weight difference is possibly negligible. Rubber always weighs less than metals. I would like to build a Marge lite to a Paul WHUB with DT competition or even Sapim spokes and run that tubeless. Bet it would be really close to my 29er front wheel.
    Those are surprising figures you came up with there. Two pounds extra just thinking about the moment of inertia is large but I would have expected more than that. Thanks for posting.
    2012 Intense M9
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  16. #16
    How much does it weigh?
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    Intense Mag30 rim = ~850grams
    Nokian Gazzaloddi 26x2.6 = 1350grams
    Nokian Gazzaloddi 26x3.0 = 1550grams

    My Fatback has...

    Fat Shebas = 850grams
    Larry's = 1350grams?

    Hilarious that my Fatback wheels weigh less than some wheels people used to DH on... I used to DH on... Can't believe that... when I get my new MTB built up, it's going to feel so fast :P

  17. #17
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    Quote Originally Posted by thirstywork View Post
    This was just to see what we could do with the parts we had.
    no front brake, no pedals and what rims are those? more pics perhaps
    your 29er may float over roots and rocks, but my superlight 26 just plain floats

  18. #18
    Fatback
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    Quote Originally Posted by lamard View Post
    no front brake, no pedals and what rims are those? more pics perhaps
    Those are the 50mm rims. Old style Endo's as well, which were much lighter.
    Speedway Cycles owner http://fatbackbikes.com

  19. #19
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    31lb, 12oz. But it's only a 1x7. Uma 90s tubeless.
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  20. #20
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    Not the lightest, but real world weights

    I was paying attention to weight, but not a slave to it, when building this bike. (I have a single speed and road bike for that game.) Significant savings came from E*13 crank, Marge Lite wheels, and carbon bars. Potential weight savings could be achieved with lighter pedals, stem, grips, and brakes. Realistic future weight savings may come from carbon fork and Surly light tubes. I only went the route of a titanium frame, because I could afford it and I have to work with paint quality issues all day. Current Weight: about 32 lbs.
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-small-17-final-build.jpg  


  21. #21
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    ^those pedals and cassette aren't helping the weight either.

  22. #22
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    my 907 is really light till I put the wheels on

    Sj
    I am slow therefore I am

  23. #23
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    who's got a lightweight AL Mukluk? Just curious what that beast weighs. It looks like the light bikes here so far are all ti, and the AL bikes are mostly porky. Truth?

  24. #24
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    I have an old Ti Fatback frame like Thirstys built up between 27.5# and 29.5# depending on summer or winter wheels. Also a 2011 Mukluk at just over 30# but the two frames are only grams apart, it is my sons bike and he has to buy his own light parts. We also have a small alu Fatback and it is just under 30# also with a few heavier parts than the Ti.
    Latitude 61

  25. #25
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    Yah, bikes with "all" the parts included would be useful LOL...can't ride a bike without pedals.

    Mine pre-suspension fork was hovering right around 30 lbs. After adding the SC32 it's about a pound heavier, but way more fun to ride.

  26. #26
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    my geared 907 is 28 lbs with endo/larry and carbon forks, could get it lighter with h bars

    will weigh it once its in summer dress mode

  27. #27
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    Quote Originally Posted by AcuNinja View Post
    who's got a lightweight AL Mukluk? Just curious what that beast weighs. It looks like the light bikes here so far are all ti, and the AL bikes are mostly porky. Truth?
    Mukluk 2 (M) modified 31.5 Lbs

    Clown Shoes
    DT Super Comp Spokes AL Nipples
    Q- Tubes
    Huskers
    Salasa hubs
    WTB Pure V Ti seat
    XT Cassette -1 (8spd)
    WB Fork
    Heavy Platform SPD's
    Magura MT8 brakes/SL Rotors
    Truvative World Cup Stem
    Super Light O2 in Tires
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-2012-02-11_14-40-24_570.jpg  


  28. #28
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    Steel frame 28 pounds with pedal, light and computer mount, and bar ends

    Ox plat steel frame, sram xo 160/180 brakes, 3x9 gearing, carver carbon fork, salsa rear and paul front hubs, eggbeaters
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-img_0826.jpg  

    Lightest Fatbike-img_0827.jpg  

    ONCE YOU RIDE FAT U WONT GO BACK!

  29. #29
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    30.5# without the frame bag and Welgo mag pedals and the Umas.
    Edit: re checked it and came out to 29.5# with the self drilled Rolling D's,HD's, and spd's in summer trim.
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-fat-bag.jpg  

    Last edited by bdundee; 02-17-2012 at 01:30 PM.

  30. #30
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    2012 Fatback Aluminum with Carbon fork, UMA 90's and Ritchey WCS components, without pedals is 30lbs dead.


    <a href="http://www.flickr.com/photos/74469747@N06/6839685751/" title="IMG_0880_edited-1 by Fatbackrider, on Flickr"><img src="http://farm8.staticflickr.com/7030/6839685751_14c608f75d.jpg" width="375" height="500" alt="IMG_0880_edited-1"></a>

  31. #31
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    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.

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    If you switched to a Fatback Carbon Fork, UMAlll's and some lighter pedals you would drop at least two pounds. Weight adds up quick on a bike. You could save two to five ounces with different spokes.



    Quote Originally Posted by danaco View Post
    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.
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  33. #33
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    Quote Originally Posted by danaco View Post
    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.
    That's why I always photograph my bike on the scales...
    Last edited by Velobike; 02-17-2012 at 11:59 AM.
    As little bike as possible, as silent as possible.
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  34. #34
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    I've seen 100 grams in difference from one HD to another.

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    Quote Originally Posted by danaco View Post
    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.
    Danaco, The old Ti Fatback I have saves about 750 grams between our rims, pedals, hubs, fork, seat, and cassette. I have slightly heavier brakes, Hayse Stroker Grams, but I suspect a lighter crankset, Middleburn on a Race Face BB. I also have mostly ti bolts for the all of 10 grams that saves So 2 pounds difference all up between the two is not impossible to believe. In summer mode it loses a bunch by going to V!Z rims at under 600 gms each.

    It has way drilled out Fat Shebas, Candy Ti pedals, Modified WTB hubs at about 500 gms for the pair, an old Fatback Ti fork, Flite TT seat, and an XTR cassette.
    Latitude 61

  36. #36
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    Quote Originally Posted by Velobike View Post
    That's why I always photograph my bike on the scales...
    my LBS has a cheap scale up on the ceiling so I can't get a pic. Ordered a Park scale today so I can get down to the bottom of this.

  37. #37
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    Quote Originally Posted by danaco View Post
    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.
    I hear ya. I wonder if some of these scales are off. Some bikes here are lighter than my rip9. And she's got some light parts. I don't get it.
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  38. #38
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    Quote Originally Posted by thickfog View Post
    I hear ya. I wonder if some of these scales are off. Some bikes here are lighter than my rip9. And she's got some light parts. I don't get it.
    Kinda my point . I'm not outright doubting folks here, not at all but some disparities are tough to swallow ! Let's face it, I'm just jealous

    It's OK though, I'm used to riding a 32# full squish, it's my secret training weapon when it comes to racing, screw the training regime, rather have fun riding

  39. #39
    is buachail foighneach me
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    Quote Originally Posted by danaco View Post
    I gotta say I'm somewhat perplexed by some of the weights here. Mine being one of the lightes frames (Muk 2) and pretty light stuff on it inluding the lightest brakes out there, they took off over a pound alone and seeing the sub thirty weights of some bikes with similar stuff makes no sense to me.
    You would be under 30 lbs with the following 'upgrades':

    Fatback Carbon fork
    Ti bolt seat post collar
    lighter seatpost
    non-goofy(Salsa's fault) rear brake routing
    lighter pedals
    lighter cassette
    70 or 80mm rims
    no bashring

    Some of the folks with very light bikes are also running much lighter hubs than you.

  40. #40
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    Quote Originally Posted by sean salach View Post
    You would be under 30 lbs with the following 'upgrades':

    Fatback Carbon fork
    Ti bolt seat post collar
    lighter seatpost
    non-goofy(Salsa's fault) rear brake routing
    lighter pedals
    lighter cassette
    70 or 80mm rims
    no bashring

    Some of the folks with very light bikes are also running much lighter hubs than you.
    You are correct on all points. The rear hub is a real brick for sure, the pedals are heavy for SPD's but I like platforms for snow riding. Surprisingly, the wheels with the cown shoes are very very close to the RD set up it came with. I really like the added float and grip I get stretching out the HD's, noticeably better than the 80's.

    I am no stranger to making bikes light and know that every gram adds up. I'll save that for my racing stuff and I know that it makes a difference, ah' the mental advantage !! If I didn't do as well as I have over the years I'd say BS, but for now I'm stick'in with it.

    With the fat bike, I took out over two pounds from stock and feel that is good enough for that bike and the fun I use it for. If I were racing it that would be a different story. Like xc racing, mental advantage(as we'll as real weight wise) works well for me. For fun, heavy bikes make and keep you strong.

    And what's most important is that we ride

    Cheers !

  41. #41
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    The funny thing is ,todays fatbikes are probably around the same weight (or maybe lighter) then alot of the early MTbikes from the 80`s & early 90`s (yea yea I know I`am old) & a lot more fun to ride IMO.Plus I know when I get on my Lynskey ridgeline (23lbs ) its like WOW ,especialy going up hill.

  42. #42
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    Quote Originally Posted by danaco View Post
    Kinda my point . I'm not outright doubting folks here, not at all but some disparities are tough to swallow ! Let's face it, I'm just jealous
    I did some checking and I could only find the weight on a Muk 3 (I realized the 2 will be lighter) frame and a med. came in right around 4.5# and my 16" Fatback came in a 3.75# with cups installed.

    Disclaimer: Don't quote me on the Fatback frame weight due to unverified scale.

    Edit: Also I am not taking it back apart to check the weight again.
    Last edited by bdundee; 02-17-2012 at 08:44 PM.

  43. #43
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    fine details like butted spokes or Ti bolts help, but really i think the wheels and tires are the biggest variance. My pugs 1x10 pugs build on the skinny was 28lb 13 oz when i first built it with crazy light endo/larry that weighed it at 2600g. than i switched to a big fat larry and a 27tpi nate for the rear and it was a gain of 680g more recently i moved to tubeless and swapped a carver fork dropping most of the weight back off. the carver fork didn't like my hope rotors, so i swapped my 160/140 for some 160/160 avid rotors for another 70g increase.

    the devils in the details
    your 29er may float over roots and rocks, but my superlight 26 just plain floats

  44. #44
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    Quote Originally Posted by lamard View Post
    ...the devils in the details
    That's the secret to a light build IMO.

    There's no need to spend a lot of money on delicate parts made of Unobtainium when the use of a bit of Drillium or Hackoffium does the same job.

    An example, most people don't have their seat post at full extension, and so they could cut off any excess. Your basic alloy post can end up the same weight as that fancy Ti one that you couldn't bring yourself to shorten because you'd spent so much money on it.

    However I will happily spend money on a lightweight part if it has the potential to be reused on another build. For example Middleburn cranks.

    My object is always to have the bike no heavier than it has to be rather than getting it as light as possible.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  45. #45
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    Quote Originally Posted by Velobike View Post
    spend a lot of money on delicate parts made of Unobtainium then use of a bit of Drillium or Hackoffium to complete the job.

    fixed
    your 29er may float over roots and rocks, but my superlight 26 just plain floats

  46. #46
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    2012 Large Fatback a touch under 29#'s

    I don't have a hanger scale either so I weighed everything as it went on the bike. The only weight not included was the shifter cables.. here are a a few fat bike weight specs for the weight weenies..

    New Fatback Build - from the colorado front range

    I'd cut off the KORE post ( 410mm ouch!) if it didn't creak so much at the seat mount. I hate creaking.
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-picture-030-small-.jpg  


  47. #47
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    Quote Originally Posted by lamard View Post
    fixed
    Yup best option. It also lightens wallets, so the overall weight of bike and rider is reduced too.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  48. #48
    Bunker Hill Bikes
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    Custom Quiring Fatbike

    Going with V8 parts, the Quiring fatbike comes in at 30.22 pounds with out the commuter gear.

    -Chad
    Attached Thumbnails Attached Thumbnails Lightest Fatbike-q-side.jpg  


  49. #49
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    Quote Originally Posted by Velobike View Post
    Yup best option. It also lightens wallets, so the overall weight of bike and rider is reduced too.
    May cause spouse to chew you out adding further weight reduction.
    Latitude 61

  50. #50
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    haha, no spouse and usually carry plastic for ultra light weight!
    your 29er may float over roots and rocks, but my superlight 26 just plain floats

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