Mountain Bike Manual Trainer From One Board (Collapsible)

I made a Mountain Bike Manual (a wheelie without pedaling) balance trainer. It is made from one board and uses a cord attached to the front wheel to keep the bike from tipping all the way back. It can be adjusted for a 29 inch or 27.5 inch wheel. It uses interlocking pieces and needs no screws or glue. It can be quickly and easily put togethe or taken apart if you need to move it or to store it.

Supplies

8'x7' board

yard stick

jigsaw

sandpaper or belt sander

router

paint and paintbrush (optional)

Bike to practice with

Step 1: Measurements

I measured out all of my pieces at once and cut them out and cut notches in them later.

The first pieces I cut were the side pieces which hold everything together. They are 40" long and at one end, 4" tall. 20" down the board, the height rises for 9" to 20" tall. (see image)

The rest of the pieces are much easier to make, 2 6"x4" rectangles, one 4" tall trapezoid, 15" long on the bottom and 9" long on top, and one 11" tall trapezoid, 24 inches long on the bottom and 8" long on top.

I was able to fit all of my pieces onto half of my 8'x7' board. After this I just cut out my pieces with a jigsaw.

Step 2: Cutting Notches

This was the hardest step of the project because if the notches are not the right size, they will not fit together right. The notches should all be as thick as your board. For the two rectangles, the notches are 3" apart and 1 3/4 " deep on one and on the other, 2 1/4" deep. On the large trapezoid, they are 3" apart and 5 1/2 in deep. On the small trapezoid, they are 3 in apart and 1 1/2 " deep. On all of these pieces, you can change how far apart the notches are based on how wide your tire is.

On the large side piece, 3" from the front cut a 3" notch. 32" from the front, cut a 5 3/4" notch, and directly above that on the top, cut a 2 1/2 " notch.

Step 3: Tire Sizes

Because bikes have different tire sizes, I made the manual trainer able to adjust to multiple tire sizes, to do this, I measured out where the support needs to be so that it will hold the tire in but the tire will still fit. I cut two slots at different depths so that the tire size could be changed.

Step 4: Rounding It Off

I first used a belt sander to round the corners on the pieces where they do not touch the ground and then used a router to round off the edges the rest of the way.

Step 5: Painting It

I just used a glossy white house paint but you can paint it with anything or not paint it at all

Step 6: Assembly

To put everything together, stand the two large side pieces up next to each other, slide them over the large trapezoid so the slots match. Then slide the slots at the front over the small trapezoid. Then slide the rectangle with the bigger notches over the top at the back. After that put the last rectangle into the slot for the size of tire you will be using. Then just tie a piece of rope from the front trapezoid to the front tire so that when you lean back, you will not fall off the back.