Instructables
Picture of A better Ski Bike
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Here's the ultimate DIY Ski Bike!!! I wanted it to function well, be super strong, easy to fabricate, not too heavy, and very cheap to make. 

Here's what you'll need:
- an old BMX Bike (MTB's work too) 
- 2x4 stud (x1)
- 8" Hinges (x2)
- 2" Lag Bolts (x12)
- 2" Drywall Screws (x12)
- 3/8" BMX wheel axles (x3) (keep all nuts) 
- Flatland BMX Pegs (x2)
- a Pair of old Skis
- Spray paint

Step 1: Prepare bike

Picture of Prepare bike
Remove the wheels, cranks and chain.  Remove the axles from the front and rear wheel.  Keep all your nuts.  Keep the bottom bracket cups installed in the frame as a super strong seat for your pegs.

Step 2: Flatland Pegs

Picture of Flatland Pegs
Use a set of large flatland style alloy pegs and a extra 3/8" BMX axle to create the standing platform.

Step 3: Install Pegs

Picture of Install Pegs
The pegs seat perfectly into bottom bracket cups. This setup virtually bomb-proof.

Step 4: Setup the Hinges

Picture of Setup the Hinges
Remove the hinge pin from the hinges by drilling out the spots where the pin is punched.  Keep the plastic spacers in place (if any).  The pins can vary slightly in diameter from brand to brand. I got mine at lowes and the bmx axles were a snug fit but required no modification.  You may need to drill or ream or pry them out slightly to fit 3/8". Use the nuts and washers from the donor wheels to fill in the gaps. You don't want to pinch or spread your bike too much in order to make a snug fit. I backed off the inner most nuts a 1/4 turn away from the edge of the hinge so it swings freely on the axle.
 
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pcorbett1 year ago
That is exellent work there. Cheapest and best setup I've seen. I have the standard wood blocks and now I'm going to swap them out for this. Thanks for sharing
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zfollette2 months ago
Couldn't you use skate trucks to connect the ski to the bike?
Oblongata1 year ago
Nice build! I like the hinge idea, slick. Now you just need some bungees to hold the tips up and some old tire tread wrapped around the pegs for more grip when they get covered in snow/ice.
by the way, not all heavy duty 8 inch hinges will work. I got some from home depot, and the 3/8 inch rod/axle wouldn't fit in the hinge, even after prying them open a bit. You may have to use the 12 inch hinges.
When you leave the bottom bracket cups in, do you leave the bearings in too?
melonpeel (author)  masterbuilder1 year ago
no, just the cups
B4SEC4MP1 year ago
Great work! I'm working on a ski-bike of my own and have to say your hinge system is brilliant! I agree with the prior statement about adding some form of bungie system. Once you get that puppy airborne, you'll want to be sure the skis stay smooth side down!
dilysalu1 year ago
This looks like it would work for a child ready to bike, Yipeeeeeeeeeeee!!!!!!!
Smart solution with the hinges! Nice project!
embochner1 year ago
how do you control it?
melonpeel (author)  embochner1 year ago
Search youtube for "skibike"... lots of fun!
looks like a lot of fun- came across this on youtube- https://www.youtube.com/watch?v=9ztf84Nhtt8&feature=related
Like a regular bike. It's not as hard as it seems.
jgfresh1 year ago
that looks dangerous.. but fun!
ilpug1 year ago
you need to add elastic strips to keep the blades from rotating.
Kiteman1 year ago
That's really cool.