Introduction: Easy Soap Box Derby Car Build
These instructions demonstrate how to build an inexpensive simple Soap Box Derby Car. You should be able to build this car for about $50. Study this pictures and it will make your build easier. You may need to refer to these later if you have questions.
Step 1: Exploded View Refrence
Refer to these drawings if you have questions or need more clarification. It shows all the components that are in the assembly.
Step 2: Gather Needed Supplies and Hardware Reference Sheet
Preparation Step (Most Important)
The most important step of these instructions is safety. Please wear appropriate safety gear when needed. Safety glasses will protect your eyes when drilling and work gloves will protect your hands. When using power tools, follow all safety guidelines in the owners manual. Children should be assisted by an adult when building this kit.
These instructions are written for a builder of average skill. You can change and customize you car in anyway that you like.
Shopping Step
Gather all your needed supplies. You can just print these off and use as a shopping list. Any Home Improvement store will sell these items with the exception of the wheels, they may be harder to find, but you can substitute other wheels if you'd like.
Step 3: Step #1 Building the Front Axle Assembly
Step 4: Step #2 Attaching Front Axle Assembly to Frame
Step 5: Step #3 & #4 Building and Attaching Rear Axle Assembly
Step 6: Step #5 Attaching the Seat
Step 7: Installing Brake and Steering Rope

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2 People Made This Project!
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22 Comments
Question 5 months ago on Step 7
wear do we buy the kits
Question 10 months ago on Step 7
I see where it says to refer to the next page for the wheel install. Where is the next page?
Question 2 years ago on Step 6
Hi
Can someone tell me where i can buy those parts ?
thank you
Question 3 years ago on Step 7
Having a hard time understanding the eye bolt hardware - says I need two #4 2-5/16" - 5/8" eyebolt. Anyone explain those numbers?
Answer 3 years ago
the eye is 5/8ths. the bolt is 2 -5/16ths. the #4 the type i believe
3 years ago
is there an easy way to tell, for each different picture, which pieces of wood are shown and where to drill the holes? first time building
4 years ago on Introduction
I built my soapbox car based on these plans with some modifications. If you need an additional reference check out my build video here: https://youtu.be/7gY98oXZdbY
5 years ago
Where is Step 7, brake and wheel attachment?
5 years ago
Where is step 7, brake and wheel attachments?
5 years ago
Hi there, You mention a kit. Is there a kit we can purchase? Thanks!
8 years ago
Hi there I love this plan, but it's missing the rest of the break and wheel set up instructions. How I do I get them or get to those pages it's saying to refer to?
Reply 6 years ago
Did you find step 7?
7 years ago on Introduction
Did anyone figure out how to attach the wheels? It looks like you would need a hole drilled into the end of the rod, but hopefully not. :) Also, how does the brake work?
Reply 7 years ago on Introduction
Hi, There are a couple of different ways. The easiest would be to use a rod collar. Hope this helps. See image in comments.
Reply 7 years ago on Introduction
Perfect, thanks!
8 years ago on Introduction
Simple plan. Thank you. Where are the wheel install instructions?
Reply 7 years ago on Introduction
Hi, There are a couple of different ways. The easiest would be to use a rod collar. Hope this helps. See image in comments.
Reply 7 years ago on Introduction
Hi, There are a couple of different ways. The easiest would be to use a rod collar. Hope this helps. See image in comments.
Reply 7 years ago on Introduction
Hi, There are a couple of different ways. The easiest would be to use a rod collar. Hope this helps. See image in comments.
Reply 7 years ago on Introduction
Hi, There are a couple of different ways. The easiest would be to use a rod collar. Hope this helps.