How can you leave a mark when biking? Meet the Bike-A-Line machine! Make lines with chalk as you ride your favorite two-wheeler (as you see I've made an attachment for e-scooters as well).

I love bicycles and many of my projects have some kind of bike component. With this Instructable, I hope to inspire you to build stuff for your bike ( If you got time please check out my bike cinema the Cine Abulante and my bike caravan, the Quarter Camper)

This very simple machine (is it a machine?) is so much fun to use.

Follow the line!

Supplies

Metal scraps

Spring

Nuts and bolts

Tools:

Welding gear

Step 1: The Chalk Arm

This is super easy and I guess you can do this many other ways, I wanted it to survive a war so I chose to weld it all up. The chalk holder was a square pipe and I made a simple hinge for the arm to attach and move freely. Where the chalk is I added a spring to push the remaining chalk out and use almost all of it. What I needed to find was a small weight so the lever would be forced to the ground.

Step 2: Clamp for the Bike

Super simple clamp to attach the arm to the side of the bike. Most important is to have the arm steer away from the wheel. The arm has a bend and the clamp has an extended screw for the arm to lock into. The clamp itself is only tightening two steel plates to the rear bike frame. The eye screw is used so it will be easy to screw/unscrew when done.

Step 3: The Bike Connector

The arm is made so it will clamp to the side of the rear bike wheel. At this point, you need to screw it onto the clamp. It works really well. The arm has a bend so to make it point outward from the tire.

Step 4: Measure Once… Twice!

I used my credit card to check the size of the e-scooters rear. Also, I needed to see if the chalk arm would work. With these guidelines, I went to work and eyeballed the new add-ons to the machine.

Not only can I ride my bike and draw a line, as of today I can jump on a scooter and line everything up:-)

Step 5: The Scooter Attachment…

There is no need for this part to be fastened to the scooter, all you do is put it on the back wheel and have your footrest on it. I work very well and I had no problem as you might see in the videos.

Step 6: Leave Your Mark!!!

I believe bikes should be allowed more room and lanes to roam free. This crude little machine/tool will at least make people smile, I know because they do when I pass them. And a smile goes a long way when you want to make more people happy about cycling.

I would love to see others have a go at this solution and maybe add more finesse to the design. I like this in its very simple function and I can assure you it will take a beating and still make a mark:-D

Want to see more bike-related projects, please ride along over at my Instagram: @smogdog