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20" Mongoose Kong

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#45 ·
The crank is cheap. the catch is that you need one with short arms(145) and that will take a small enough ring. BMX cranks don't take a small enough ring so my local shop cut, drilled, and tapped a MTB crank to make it work. Phat Moose in Ottawa. Great shop. they also made a chain guard for it as well.
 
#47 ·
Just a quick heads up. A company called Stampede Bikesout of California is making a 20" fat bike that looks like a really good bang for the buck. It is on sale on Amazon. It's called the Fat Byke 20. It looks like it is about 6 pounds lighter than the Kong. It is what we decided to order.
 
#48 ·
4AKboys said:
Just a quick heads up. A company called Stampede Bikesout of California is making a 20" fat bike that looks like a really good bang for the buck. It is on sale on Amazon. It's called the Fat Byke 20. It looks like it is about 6 pounds lighter than the Kong. It is what we decided to order.
Click to expand...
They claim that it weighs less than 30 pounds, is that correct? I would be all over this if it had decent gearing, but still looks to have the same 40T front ring with the 7 speed thread on cassette that has no real options to be upgraded.
 
#49 ·
There are a couple reviews out there that also say around 30 lbs. I think they are by "twowheelingtots" and "mountainmama." I emailed the owner Ian asking about using a smaller chainring on the crank. He said the one that comes on it is a 40T but said it could be swapped out, which I assume means the chainring is bolted on, not riveted, and he did not mean you have to swap the entire crank. Ours should be here by the end of the month and I can let you know for sure. It is also a freewheel on the back, but it can use the shimano mega-range cassette to improve the gearing a bit.
 
#50 ·
Hard to tell in the picture, but sure looks like the Kong crank, which was one piece of heavy steel with no ability to change. And the 11/34 mega-range is what I put on my daughter's Kong, and it still wasn't enough. My daughter is a beast, and we tried to use it just riding on fairly flat powder, and the gearing was just too high. The only options I could find were trials cranks, and they were half the cost of the Kong. So ended up getting her some 24x2.4" tires for her normal bike, and it worked great, as long as she was not first on a powder day.
 
#54 ·
I got it Tigris99, what I think is to change both rings too, that it is easy ... I practice Downhill and build my bikes, what want is to convert this to an MTB bike, but I need to know the steerer tube inner diameter on the frame ... I didn't find that information
 
#55 ·
It's normal head tube for 1 1/8 straight steerer. External cups. Nothing special about it as for normal frames there is only a couple standards. External 1", external 1 1/8", integrated 1 1/8, tapered, or 1 1/2 straight (cannondale only I think).

It's not a threaded 1" steerer so that makes it 1 1/8 external.

Headsets are the easiest to figure out though people over think them.

I am trying to figure out why you want to take a 190mm spacing frame and make it skinny tires. Can create the same bike using a 26" MTB frame.

Btw the bike is NOT the size of a 24" bike. Total tire diameter is that of a 26" MTB. So trying to build a MTB out of this frame you need to address it as a 26" bike otherwise bottom bracket is going to be really low, major pedal strike problems.

Sent from my XT1565 using Tapatalk
 
#56 ·
It was in the morning a couple like this: Mongoose Massif 20 " 7 Speed Boys Fat Tire Bicycle All Terrain Mountain Bike New | eBay
It was a couple for $50 each from China... but It is gone, only there are now these expensive ...
It is important that about the height, but this was a 20" wheel size not 24",... 190mm rear hub in a 20" wheel? ok, I don't know much about Fat Bikes
For a little 6 years old boy that is growing it was a good idea take that little fat bike to convert to an MTB to destroy in rough terrain, but it sold out
I will continue looking for 20" bikes on eBay, there are very few in my city
Thanks for all the information
 
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