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  1. #1
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    Smile Upgrading a Mongoose Dolomite for winter fun

    Hi.

    ( A little bit back-story first )
    Recently I got my hands on a Dolo. ( 220 bucks inc. shipping )
    That may sounds like nothing special, but here in germany they don't sell them, or any other Mongoose bikes.

    I wanted to have a cheap, but decent Fatbike for the upcoming winter.

    The reason why I bought the Dolo is simply that the other Fatbikes here in germany have the same or even worse specs on 500 Fatbikes.
    + Even the 500 Fatbikes have a really shitty frame design.

    Also I wanted to build up my first mtb and this was a great opportunity.

    A Shop owner in Hamburg had 2 of them.
    Note: I don't know why he changed the decals from Mongoose to SjBikes. It is literally the same bike.

    Attachment 1166949

    To make this post not too long I will simply list the parts I have changed so far. and explain my experience )

    - Shimano hydraulic disc brakes BR-M315 ( Really great entry level brakes! I haven't changed the rotors yet, but they still work great )

    - Formula Rear Brake adapter ( IS2000 to postmount )
    - Sixpack Racing Vegas flat pedals ( I love them )
    - Sixpack Racing seat clamp ( works and looks great )
    - Jagwire cable holder ( work great )
    - BBB Hydro clamps ( a bit sharp on the housing )
    - KCNC Headset Spacer
    - KCNC Headset ( no issues and it looks great )
    - Wake 780mm handlebar (310 gram, looks awesome, but weak paint)
    Upgrading a Mongoose Dolomite for winter fun-2.jpg
    - Megura cable holder
    - Jagwire end caps
    - Kolloy UNO stem ( very light and great design )
    Upgrading a Mongoose Dolomite for winter fun-3.jpg

    - 117mm Tmars mechanical dropper post ( description says 110 mm, but it's actually 117 mm, it looks great but doesn't work great )

    - Schwalbe Jumbo Jim tires and Schwalbe 13 J tubes
    ( the tires and tube made the biggest impact. I literally saved 1500 grams on each wheel, also those chinese tires ****ing stink)

    - SGD saddle ( the saddle is from my YT Jeffsy )
    - Sensus light grips ( also from my Jeffsy )

    - Lutu 32 Air/Oil Fork with 125 mm travel and Lockout
    Upgrading a Mongoose Dolomite for winter fun-4.jpgUpgrading a Mongoose Dolomite for winter fun-7.jpgUpgrading a Mongoose Dolomite for winter fun-8.jpg
    I bought this fork on Aliexpress. So far it works and looks really great. The seller wrote 1850 grams, it is actually 1900 grams.
    Note:Its 1915 gram,because I forgot to take off the plastic protection.
    Upgrading a Mongoose Dolomite for winter fun-6.jpg
    The lockout looks like the Manitou absolute+ system. You can click around 6 or 7 times before it locks the fork completely.
    The price is 160 dollar incl. shipping ( to germany )
    Upgrading a Mongoose Dolomite for winter fun-5.jpg
    However I had a few issues with the fork.
    1 > the steer tube is 250 mm not 220 mm long
    2> I had to tap the threads anew, because I couldn't fit the M6 screws

    - And finally the whole drive train!

    > Shimano 9 by Deore RD-M592 Shadow Derailleur
    > Sunrace 7 speed Megarange 13-34 freewheel
    > KMC full nickel-plated chain
    > Shimano housing ( in red color )
    > Shimano 7 by Altus M310 Trigger
    Note: I couldn't put something better one it, because of the cheap rear hub. And buying new wheels was too expensive.
    The whole drive train update was just 65 bucks and it makes a real difference from the original Shimano Tourney drive train.
    Upgrading a Mongoose Dolomite for winter fun-9.jpgUpgrading a Mongoose Dolomite for winter fun-10.jpg

    Overall, including all shipping costs, taxes and the Dolo itself I spent around 800 bucks on it. The Dolo weight is now 15,5 kilogram.
    The last thing I want to change is the cranks.
    I thinking about the prowheel set.

    So, yeah that is my little Dolo build I came up with.
    I know, I know, I could perhaps bought a better bike for those 800 bucks, but it was a great learning experience for me
    and also a hell lot of fun.

    My first ride was roughly 75 kilometers. This thing is now a blast on the trails. Thanks to the fork

    Now the winter can come.

    Cheers!

  2. #2
    Fat Biking & Health Rider
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    Nice upgrades!

  3. #3
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    That brontosaur has roller skates now!
    2016 El Oso Grande
    2018 Stolen Zeke
    90's Skykomish

  4. #4
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    @MikeTowpath
    Fanx :3

  5. #5
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    Little Update.
    I put on some new Cranks and BB
    Upgrading a Mongoose Dolomite for winter fun-11.jpg

    And a new chain ring
    Upgrading a Mongoose Dolomite for winter fun-12.jpg

    I'm also about to build my first own pair of wheels.
    Upgrading a Mongoose Dolomite for winter fun-13.jpgUpgrading a Mongoose Dolomite for winter fun-14.jpg

  6. #6
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    Today I finally got rid of the Spacer tower of doom.
    Upgrading a Mongoose Dolomite for winter fun-15.jpg
    Upgrading a Mongoose Dolomite for winter fun-16.jpg

    Also my Fatty moved next to my Jeffsy-
    They are now BFF
    Upgrading a Mongoose Dolomite for winter fun-17.jpg

  7. #7
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    Another update.
    The Wheels are done.
    The only thing thats left is the rear derailleur, chain and the trigger.
    The new wheelset weights 2552 g. The old wheels weight was over 4000g
    Upgrading a Mongoose Dolomite for winter fun-20.jpgUpgrading a Mongoose Dolomite for winter fun-21.jpgUpgrading a Mongoose Dolomite for winter fun-22.jpg

  8. #8
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    Chain guide installed.
    Upgrading a Mongoose Dolomite for winter fun-23.jpgUpgrading a Mongoose Dolomite for winter fun-24.jpg

  9. #9
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    Very nice work!

    What is your tire + wheel weight, in as ridden condition, including rotors, cogs, etc.

    In other words, how much do they weigh when you take them off the bike?

  10. #10
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    Quote Originally Posted by Paul Fithian View Post
    Very nice work!

    What is your tire + wheel weight, in as ridden condition, including rotors, cogs, etc.

    In other words, how much do they weigh when you take them off the bike?
    Front is about 2813g and the rear 3475g.
    Both = 6288g

  11. #11
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    Finally finished adjusting the drivetrain.
    It was way harder than I expected.

    The drivetrain is a combo of 11 speed cassette, trigger and chain and a 12 speed rear derailleur.

    The new battle weight of the steel Dolo is now 14,8 kg without the mudguards.

    Also Mongoose sent me a message that they can ship the original frame decals to my country.
    That will be the last thing I will do to finish my build.
    Upgrading a Mongoose Dolomite for winter fun-25.jpgUpgrading a Mongoose Dolomite for winter fun-26.jpgUpgrading a Mongoose Dolomite for winter fun-27.jpg

  12. #12
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    Quote Originally Posted by OneTrustMan View Post
    Little Update.
    I put on some new Cranks and BB
    Click image for larger version. 

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    And a new chain ring
    Click image for larger version. 

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    I'm also about to build my first own pair of wheels.
    Click image for larger version. 

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    Could you help point me to what BB and chainring/crank arm combo you purchased. My old 3 piece crankarms and axle stripped the square tubing and looking to find something wide enough to fit the fat spec thank you!

  13. #13
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    Quote Originally Posted by JdmSkylineGtr View Post
    Could you help point me to what BB and chainring/crank arm combo you purchased. My old 3 piece crankarms and axle stripped the square tubing and looking to find something wide enough to fit the fat spec thank you!
    Raceface Aeffect will probably fit your bike. Light too.
    I like turtles

  14. #14
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    Great post. I'm interested in what you did for your crank and spindle as well, because it is a non standard length on the OEM spindle (104mm, I think).

  15. #15
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    Killer build, and its rad to see one of my bikes in Germany, even if it is rebranded.
    Mongoose product development

  16. #16
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    Quote Originally Posted by JdmSkylineGtr View Post
    Could you help point me to what BB and chainring/crank arm combo you purchased. My old 3 piece crankarms and axle stripped the square tubing and looking to find something wide enough to fit the fat spec thank you!
    There are much more economical options towards the end of the Dolomite thread. Cartridge with curved arms.
    Crazy on this ship of fools...

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