Instructables

Mountain Bike Fork Truck Mount

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Picture of Mountain Bike Fork Truck Mount
Over the last few years, a big change was made in Mountain Bike fork designs with the 15mm through-hole axle.  While this gives a lot more stability for downhill racing and for larger (heavier) riders, it has also proven to be a bit more of a hassle to transport your bike from place to place.  

There are conversion kits you can buy from Thule and Yakima, but they are upwards of $40 and clip on to an existing rack system.  If you want to mount to a truck bed or SUV floor, then you need to buy two components, totaling ~$80.   I went to two local bike shops and a specialty rack shop and no one had what I was looking for so I decided to make a quick stop by the local hardware store and design this on the fly.

 
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Step 1: Parts List

Picture of Parts List
The real magic of this is that the inside diameter of a 1/2" pipe is large enough to have the 15mm axle inserted into it.  Most of these pipes have a smooth enough inside surface but I did end up sanding the inside of the pipe a bit so it would not scratch my axle.  An alternate design would be to use 1/2" PVC pipe and then have that in a slightly larger galvanized pipe with basically the same deign.  That would made since the axle never gets hurt since the PVC is a softer material.  I realized this after I did this project but it is really your choice.  

My Parts List:
(1) 1/2" diameter, Galvanized pipe "T"
(1) Base / pedestal floor mount
(2) 1/2" diameter Galvanized pipe, 1" in length (you the actual length depends on how tight you wrench it together and how much slop you want.
(1) 1/2" diameter, 2" length (this can vary a few inches depending how high you want it to be, keep it lower for less stress on the part.  
(1) Base wood stand (I had a piece of 3/4 plywood (4" wide x 34" long) around so I used that.  You could use a 2"x6" if you want.  I would keep it at least 36 wide so stays flat on the SUV or truck floor. 
(4) 3/4" wood screws

OPTIONAL
(1) Paint (optional)
(1) Fabric (optional, but it sure makes it look nice)
(1) length of 4" wide, 36" long male Velcro
(1) Spray adhesive (optional, used if you decide to cover the base with fabric)

thomasdemeo (author) 1 year ago
The axle is the standard 15mm one that comes with the Chris King front hub which holds it to the fork. I essentially just re-use it for when I mount to this truck mount.

The trick to this design was finding the right pipe that had the correct inside diameter to use the same axel and not need to get a new one. It does not move around so it seems to do the trick after 6 months of frequent use.

I did update the design and made my mounting board larger and used a ~18" x ~40" piece of 1/2" plywood.
hey man what kind of axle is that and where did you find it?
thomasdemeo (author) 1 year ago
One update I would make to this is to change the Velcro from "Optional" to "Required." Depending on the bike, it puts a lot of pressure on the board. Alternatives would simply be a wider board or if you have a truck, just mounting it to the bed someplace. That flexibility is up to you. The mount itself has been rock solid.
onrust1 year ago
Clean work. Sweet!
slaitch1 year ago
Just a thought here: if you make the board wider to have more mounts on it, you might benefit from angling them about 10-15 degrees, so handlebars interfere with each other less.
phb slaitch1 year ago
Good idea - but it might be easier to have the vertical section set to different heights; for example, make the middle mount 2" taller than the others and put the largest bike in the middle. Lifting it in this way would also mean that the other 2 mounts could be moved closer to the centre mount, with the handlebars of the bikes effectively overlapping - saving space and keeping the bars away from windows.
thomasdemeo (author)  slaitch1 year ago
Thanks for the suggestion. For this particular design, I just needed to secure one bike (since the bike is actually a tandem) so I just went with one mount. It could easily be extended to 2 or 3 bikes. As for angling it, that may help, but it would also increase the overall length and the handlebars would then extend into the back glass window. For this design, I wanted to keep the handlebars parallel to the glass so they would not smash hte back window. Perhaps on an exterior truck bed this would be fine.
thomasdemeo (author)  slaitch1 year ago
Thanks for the suggestion. For this particular design, I just needed to secure one bike (since the bike is actually a tandem) so I just went with one mount. It could easily be extended to 2 or 3 bikes. As for angling it, that may help, but it would also increase the overall length and the handlebars would then extend into the back glass window. For this design, I wanted to keep the handlebars parallel to the glass so they would not smash hte back window. Perhaps on an exterior truck bed this would be fine.
marple2001 year ago
Nice and simple. Good, clear instructions. Keep them coming.
This is very clever. Thanks for the share - I have been looking for an idea like this :)