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  1. #1
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    Mongoose Beast modifications

    I started another thread ( Walmart Mongoose Beast sucks! ) hoping that it would be about the bike itself and modifying the bike. It didn't work. I'm going to try again.

    I knew what I was getting into, and I'm glad I bought my Beast. I'm not saying it is an awful bike. My premise is that the bike is close to unrideable in its stock form. It's way too heavy and the gearing is way too hard. The bike will be modified! This ought to be fun!

    Let's keep this thread to discussions about the bike!

    How have you modified your Beast? What parts did you use? How much weight did you save? Got any pictures?
    Out to ride

  2. #2
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    Quote Originally Posted by Larry Endomorph View Post
    How have you modified your Beast? What parts did you use? How much weight did you save? Got any pictures?

    Thanks for starting this again!

    I might drill out my wheels later this afternoon.

  3. #3
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    So does the rear take a special cog to change the gearing or just a standard cog?

  4. #4
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    Quote Originally Posted by AC/BC View Post

    I might drill out my wheels later this afternoon.
    Would you please weigh your wheels before and after. Especially the front. Maybe we can make some deductions to arrive at the approximate weight of the rim itself.

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    Mine doesn't arrive until next week ... But if no one has done so by then, I'll throw up any and every number I can think of as they relate to sizes, geometry, and weight (to the limits of my scale).

    Tires = Already have a set of Origin8 Devist8er's on the way, and I'll give an impression of them, also ... But must admit that I can only compare them a standard width MTB tires that I have ridden, so it won't be a proper comparison.

    My intention is to ride it for a bit, and sort things out, but am thinking along the lines of widening a set of disc capable hubs Al La Sryanak's method - Widening a hub ?

    Then coming up with appropriate mounts for the calipers, and investigating at the same time, what a triple chainring might do for things.

    The basic idea being that as many components as possible be taken from the junk box, or salvaged off an as yet to be found donor bike.

    It will never be ultra-high-tech and modern, but what I buy today is usually soon outdated, anyway.

  6. #6
    AZ
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    Quote Originally Posted by Larry Endomorph View Post
    I started another thread ( Walmart Mongoose Beast sucks! ) hoping that it would be about the bike itself and modifying the bike. It didn't work. I'm going to try again.

    I knew what I was getting into, and I'm glad I bought my Beast. I'm not saying it is an awful bike. My premise is that the bike is close to unrideable in its stock form. It's way too heavy and the gearing is way too hard. The bike will be modified! This ought to be fun!

    Let's keep this thread to discussions about the bike!

    How have you modified your Beast? What parts did you use? How much weight did you save? Got any pictures?


    Can you post pics of the bottom bracket?

  7. #7
    gran jefe
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    az, it's a cup and cone square taper bb. 68mm diameter, and really long. i saw a picture somewhere. i think it was the blogger with the "90 of the fun at 10 percent of the cost" post. not that post, but one of the followups. edit: nope, not that one.

    Bikeabuser posted it below. Thank you, BA.
    Last edited by Bill in Houston; 03-30-2013 at 06:46 PM.

  8. #8

  9. #9
    AZ
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    Thanks Gents.

  10. #10
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    Weights

    Tire 1........2821g
    Tire 2........2785g

    F.Wheel.....1846g
    R.Wheel.....2713g

    Tube 1.......743g
    Tube 2.......750g

    Rim Strips...95g/ea

    Bar+Grips...671g

    Post.........449g
    Seat... who cares

    Crank.....1180g

    Pedals......379g

  11. #11
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    Hmmm, this is interesting.

    Sounds like the rim weighs less than 1300 grams and maybe somewhere as low as 1250 grams before drilling. Not too bad considering the very thin walled Flattop 100s were about 1130 before drilling and heck even the Uma 90s are about 1080 grams even with the lightening holes.

    That WAG is based on the assumption that 36 spokes (14 gauge straight) weigh about 240 grams for typical fat wheel lengths of about 260 mm and cheap brass nipples weigh about a gram a piece, and an aluminum 135 front hub weighs in the 240ish gram range but this relies on solid steel axles so add another 50 grams. Total 566 grams.

  12. #12
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    750 gram tubes!!!

    And I thought that my OEM On-One Fatty tubes were made of lead at 600 grams each!

    It will be an easy and cheap upgrade to go to Q-tubes at about 300 grams each.

  13. #13
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    With a tube like that i say you just glue the tube to the rim like a sew up and run it sans tire.

    Could be the new trend. Forget tubeless, I'm biking tireless-ly.

  14. #14
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    Quote Originally Posted by bikeabuser View Post
    .

    Tires = Already have a set of Origin8 Devist8er's on the way, and I'll give an impression of them, also ... But must admit that I can only compare them a standard width MTB tires that I have ridden, so it won't be a proper comparison.
    Here ya go:
    Product Preview – Origin8 Devist8er Fat-Bike Tire | FAT-BIKE.COM

    Origin8 OR8 Devist8er 4.0 tire

  15. #15
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    Not really an upgrade...
    Attached Thumbnails Attached Thumbnails Mongoose Beast modifications-dsc01246.jpg  


  16. #16
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    Neither is this...
    Attached Thumbnails Attached Thumbnails Mongoose Beast modifications-dsc01241.jpg  


  17. #17
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    I plan on ordering some Devistater tires as well...
    Also gotta get a smaller chainring...
    Ordered a threaded to threadless adapter..

    I also have access to a tig welder.
    Just might slacken up the front and shorten the rear...

    WTF it's a $200 bike....

  18. #18
    gran jefe
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    Son, all your paint is gone!
    Quote Originally Posted by Houndog45 View Post
    Not really an upgrade...

  19. #19
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    Quote Originally Posted by Bill in Houston View Post
    Son, all your paint is gone!
    Because stock sucks.......

  20. #20
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    I'm not new to upgrading Walgooses hahahahha ...

    I must add that it now sports some Racing Ralphs
    and a brooks saddle...and bb7s.....
    Attached Thumbnails Attached Thumbnails Mongoose Beast modifications-finished-mongoose-009.jpg  


  21. #21
    gran jefe
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    whatcha gonna put on in its place?

  22. #22
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    I read that, and they're obviously better than what comes on the bike.

    A pair should be arriving Tuesday.

  23. #23
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    Quote Originally Posted by Houndog45 View Post
    I plan on ordering some Devistater tires as well...
    Also gotta get a smaller chainring...
    Ordered a threaded to threadless adapter..

    I also have access to a tig welder.
    Just might slacken up the front and shorten the rear...

    WTF it's a $200 bike....
    I've had the same thought ... Gotta get it and ride it first.

    ETA,
    I've got access to CAD software and the ability to perform analysis, so it might be possible to get decent response via fork modification ... Just doing an overlay, it appears that the head angle is 74 degrees.
    Angles will be the first thing I measure.
    Last edited by bikeabuser; 03-31-2013 at 05:05 PM.

  24. #24
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    Quote Originally Posted by bikeabuser View Post
    I've had the same thought ... Gotta get it and ride it first.

    ETA,
    I've got access to CAD software and the ability to perform analysis, so it might be possible to get decent response via fork modification ... Just doing an overlay, it appears that the head angle is 74 degrees.
    Angles will be the first thing I measure.
    Please keep us updated...

  25. #25
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    Quote Originally Posted by Bill in Houston View Post
    whatcha gonna put on in its place?
    Clear coat.....

  26. #26
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    Wally Drilliums

    1.5" hole cuts, left two spaces near valve uncut

    Front wheel: 1549g
    Rear wheel: 2490g
    Shed 524g

    The drilling felt much the same as the Daryls - good cutting resistance, similar thickness.




  27. #27
    gran jefe
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    Quote Originally Posted by Houndog45 View Post
    Clear coat.....
    very nice.

  28. #28
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    Quote Originally Posted by Houndog45 View Post
    Please keep us updated...
    Absolutely ... But the bike might not get here until Friday.
    Kind of strange, in the cart Thursday, with an actual delivery date ... Waited till Friday, and it became a 2nd thru 5th estimate.

  29. #29
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    Quote Originally Posted by AC/BC View Post
    1.5" hole cuts, left two spaces near valve uncut

    Front wheel: 1549g
    Rear wheel: 2490g
    Shed 524g

    The drilling felt much the same as the Daryls - good cutting resistance, similar thickness.



    Sweet ... Are you gonna paint them ?

  30. #30
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    Quote Originally Posted by bikeabuser View Post
    Sweet ... Are you gonna paint them ?

    I think i'm going to leave them alone. My goal is to get this bike to 32lbs and spend less then $120 doing so.

  31. #31
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    Quote Originally Posted by AC/BC View Post
    1.5" hole cuts, left two spaces near valve uncut

    Front wheel: 1549g
    Rear wheel: 2490g
    Shed 524g

    The drilling felt much the same as the Daryls - good cutting resistance, similar thickness.



    It looks like you used a handheld drill for that, yea? Nice work, did you just use a half round file to break the edge of all the holes?

  32. #32
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    What does 524 grams work out to in lbs??

  33. #33
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    I don't understand why the mixture of measurements on bikes..
    Tire size is in inches,,etc,,,other stuff in metric..
    I'm old and stubborn ..metric makes no sense to me whatsoever..

  34. #34
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    Ok I googled. just a little over a LB...

  35. #35
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    Quote Originally Posted by AC/BC View Post
    I think i'm going to leave them alone. My goal is to get this bike to 32lbs and spend less then $120 doing so.
    Based on what's been posted, 32 seems attainable.

  36. #36
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    I don't understand why the mixture of measurements on bikes..
    Tire size is in inches,,etc,,,other stuff in metric..
    I'm old and stubborn ..metric makes no sense to me whatsoever..


    Metric is all based on ten. It's actually pretty easy. I'm 47 and I completely understand what you're sayin', but try it. It's easy.
    I like turtles

  37. #37
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    Quote Originally Posted by jackbombay View Post
    It looks like you used a handheld drill for that, yea? Nice work, did you just use a half round file to break the edge of all the holes?

    I use a Dremel with a deburring bit but a file would probably work just as well.

  38. #38
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    Quote Originally Posted by Houndog45 View Post
    What does 524 grams work out to in lbs??
    1.155
    tSETFREEBYLOVEt

  39. #39
    gran jefe
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    454 grams per pound.

  40. #40
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    Can't wait to get the wheels and tires back on the bike and test it out.

    Just crunched the numbers. I'm looking at 10.62lbs of weight savings just doing the drilling, new tubes, and some "newish" used rubber. And thats all rotating mass, where it counts.

  41. #41
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    Looks like a set of triple trees fixes front end flop..

    The adventures of bighit and his $200 Walmart fatbike | The UNDERGROUND!

  42. #42
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    Quote Originally Posted by Houndog45 View Post
    Looks like a set of triple trees fixes front end flop..

    The adventures of bighit and his $200 Walmart fatbike | The UNDERGROUND!
    Didn't bighit say his forks were screwed up ?

    A guy on bighit's (I think) forum said he can ride no-handed with stock everything ... Just say'n.
    The problem might not even exist.

    ETA;
    Not trying to turn this thread into an argument, but wheel flop is highly subjective, and because such a change absolutely affects the geometry of the entire bike, there will be an obvious perceived difference in handling.

    The trail doesn't look to be excessive, and once I take delivery, I'll have more factual information to share about this subject.

    Tires also come into play, and he did change his tires ... Maybe they weren't a good choice for this geometry and aggravated a situation.

    The jury's still out ... But if it worked for him ... Good deal !!!
    Last edited by bikeabuser; 04-02-2013 at 07:57 AM.

  43. #43
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    ^ The fork didn't bother me that much but I do get where he's coming from. Perhaps once I get this bike traveling faster i'll find the problem more bothersome.


    Quote Originally Posted by Houndog45 View Post
    Looks like a set of triple trees fixes front end flop..

    The adventures of bighit and his $200 Walmart fatbike | The UNDERGROUND!
    Nice. I'm hoping that drilling the rims and swapping the tubes is enough for me to not have to gear down. I think BigHit is still running stock tubes and non-drillium wheels.





    .

  44. #44
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    Nevermind on the triple tree,I just noticed that wasn't the stock wheel...

  45. #45
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    Geeeez....

    You guys are all bonkers. I kinda like that... personally.
    Most people ply the Well Trodden Path. A few seek a different way, and leave a Trail behind.
    - John Hajny, a.k.a. TrailMaker

  46. #46
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    Interesting setup
    That (underground) thread is formated nicely for mobile use, why can't MTBR follow suit. Their mobile version sucks on an Iphone

  47. #47
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    Quote Originally Posted by TrailMaker View Post
    Geeeez....

    You guys are all bonkers. I kinda like that... personally.
    That's why I love that cruiser frame you built

    Everything done to this bike, will be done with the intention of transferring most of it to another frame, someday.

  48. #48
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    Quote Originally Posted by bikeabuser View Post
    That's why I love that cruiser frame you built

    Everything done to this bike, will be done with the intention of transferring most of it to another frame, someday.
    Your own frame, one might surmise? Hope, even?
    Most people ply the Well Trodden Path. A few seek a different way, and leave a Trail behind.
    - John Hajny, a.k.a. TrailMaker

  49. #49
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    Quote Originally Posted by TrailMaker View Post
    Your own frame, one might surmise? Hope, even?
    Someday ... Been practicing my brazing

    Might even make it a retirement plan.

  50. #50
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    Yep my forks bent. That's the reason why I was having a hard time getting the wheel in. One leg looked off and sure enough it is. I got to bend it back now.
    2013 mongoose Fat bike
    2012 Moonlander.

    http://undergroundvelo.proboards.com/

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