Introduction: Adjustable Door Mounted K'nex Basketball Hoop

Picture of Adjustable Door Mounted K'nex Basketball Hoop

     Have you ever really wanted to play basketball but didn't have time to go to the local court? Instead you have to stay at home, bored, and miserable. Well you're in luck! If you have some K'nex, you can easily build a mini-door mounted basketball hoop! This hoop design allows you to adjust the height of the rim, and temporarily slows down the ball so you can catch it when it falls through. Attaching the hoop to a door is easy! Just slide the hooks into the crack between the top of the door and the door frame. It is an altogether simple and fun toy! If you want one, let's start building! 

Step 1: Parts

Picture of Parts

You will need:

-16 white connectors
-8 blue connectors
-8 grey connectors
-1 yellow connector
-8 red connectors
-1 orange connector
-11 purple loop connectors
-11 blue caps
-2 tan rotation locks
-2 orange diagonal "Y" connectors
-4 grey rods 
-2 green bendy rods 
-16 yellow rods 
-1 red rod
-2 blue rods 
-20 white rods 
-49 green rods 
-32 grey separators
-4 blue separators

-2 white connectors
-8 green bendy rods 

Step 2: Backboard: Center

Picture of Backboard: Center

Take four white connectors and connect them using green rods. Repeat to get four pieces. Next, connect all four pieces using green rods. Finally, fill in all spaces using white rods.

Step 3: Backboard: Edges

Picture of Backboard: Edges

Take four blue connectors and connect them using green rods. Repeat to get two pieces. Next, attach them to the center of the backboard using green rods. Make sure they are all facing the same direction as in the pictures! If they are, fill in all spaces with white rods.

Step 4: Backboard: Hook Holders

Picture of Backboard: Hook Holders

Take two grey connectors and slide them together. Repeat to get four pieces. Next, connect the pieces together using green rods. Finally, attach them to the top of the backboard using green rods. 

Step 5: Backboard: Top Corners

Picture of Backboard: Top Corners

Take two red connectors, and attach them to the top of the backboard using green rods. Next, fill in all spaces with white rods.

Step 6: Rim: Part One

Picture of Rim: Part One

Take two green bendy rods, and attach them to two diagonal "Y" connectors.

Step 7: Rim: Part Two

Picture of Rim: Part Two

Take a yellow rod and attach it to a purple loop connector. Repeat to get ten pieces.

Step 8: Rim: Part Three

Picture of Rim: Part Three

Slide three grey separators on to each of the green bendy rods, then add one of the pieces from step seven. Repeat this pattern four times total on each green rod. After the fourth repetition, slide one grey separator and one blue separator on to the green rod, and attach the final piece. Lastly, add a blue cap to each green rod.

Step 9: Rim: Attaching

Picture of Rim: Attaching

Attach the rim to the backboard by inserting the diagonal "Y" connectors into the white connectors as shown. Next, connect the opposite ends of the green rods using a yellow connector.

Step 10: Support and Delay System: Part One

Picture of Support and Delay System: Part One

Attach a yellow rod to the bottom of the yellow connector on the rim. next, slide two blue separators, and six grey separators, onto the yellow rod. Finally, add a purple loop connector and a blue cap to the end of the rod.

Step 11: Support and Delay System: Part Two

Picture of Support and Delay System: Part Two

Take two red connectors and attach them to two blue rods. Next, connect the two pieces using a yellow rod. Finally, add two tan rotation locks to the yellow rod to keep it from spinning.

Step 12: Support and Delay System: Part Three

Picture of Support and Delay System: Part Three

Connect a red rod and an orange connector. Next, attach the orange connector to the yellow rod from step 11, and the red rod to the purple loop connector from step 10.

Step 13: Check

Picture of Check

At this point, your hoop should look like this.

Step 14: Hooks

Picture of Hooks

Take a grey rod, and attach it to a red connector and a blue cap. Next, attach a blue cap to a yellow rod. Finally, connect the yellow rod to the red connector. Repeat to get four hooks.

Step 15: Hooks: Attaching

Picture of Hooks: Attaching

Attach the grey rods to the back of the grey connectors on the backboard as shown. Notice you can slide the hooks up and down to adjust the height of the hoop. You can attach the hooks in any orientation, but this method is recommended.

Step 16: The Ball

Picture of The Ball

In the following steps we will be building the simple ball that goes with this hoop. Notice how the ridges in the ball allow the Delay System to hold the ball in the hoop long enough for you to catch it.

Step 17: Parts

Picture of Parts

As stated before for the ball you will need:

-2 white connectors
-8 green bendy rods

Step 18: Building the Ball

Picture of Building the Ball

Take a white connector and attach it to green bendy rods on all sides.  Next, bend the green rods over and attach them at the top to another white connector.

Step 19: Done!!!

Picture of Done!!!

Congratulations! Your K'nex door-mounted basketball hoop is now complete! Have fun playing indoor basketball!!! 


random_builder (author)2017-01-21

This thing is pretty cool!

Narwhal 544 (author)2015-05-18

I made a smaller ball

Cool! Care to share?

TheKnexDude (author)2013-09-15

Just built this. Is the delay system supposed to hold the ball?

Yes it is, although it can also slow the ball as it falls through the hoop. Glad you built it!

sandroknexmaster (author)2013-08-03

That's nice, I really like it! Congrats for being featured =D

Merci beaucoup monsieur!!! ;)

You said you speak French... :P

Oui toi aussi? :p
In Belgium (where I live) some people speak Dutch and French, like me (But Dutch is my original language, and I can still speak better English then French :p)

Oui un peu de Francais
Yo tambien hablo espanol
en nederlandse
And of course, most fluid language: English!

The language i know least of those would be Dutch though. :/

I think your best language is google translate :D

"I think you best language is google translate" ROFL. I like that!! Nice instructable nerfrocketeer!!

nerfrocketeer (author)dozer7892013-08-03

:P thanks!

dozer789 (author)nerfrocketeer2013-09-05

Your welcome!


Dang! You caught me! I had to use translate to figure out how to say "I can speak english..."

I didn't know how to say those things in those languages... But I do know a bit of each language... :P :P :P

But of course I am a master at speaking English... :P

Hahaha same for me with Dutch :p

i allways wanted to eruope and teach english (you lack oof a bit) but really get to know my self

nerfrocketeer (author)knexboy5862013-08-03

Not quite sure what you mean. ? :/

jaberwaukee (author)2013-08-20



hunter999 (author)2013-08-16

Voted it in the weekend project contest!

nerfrocketeer (author)hunter9992013-08-16

Thanks! :)

hunter999 (author)nerfrocketeer2013-08-19

Np :)

Kona-chan (author)2013-08-07

you keep suprising me rocky

nerfrocketeer (author)Kona-chan2013-08-07



Kona-chan (author)nerfrocketeer2013-08-07

rocky is your new nickname c:

nerfrocketeer (author)Kona-chan2013-08-07

XD ok

-one of my nicknames... 8)

megustatrains (author)2013-08-05

AMAZING :o voted :D BTW do i need those orange clips in the rim: part 1?

Thanks! No you don't need them, you could use a blue 3D connector and a grey 3D connector slid together to replace the entire white connector. (Hope that made sense).

could i also try green connectors? (yes it made sense :D )

Maybe. I'm not sure. It depends on how you add them.

nerfrocketeer (author)2013-08-05


nerfrocketeer (author)2013-08-04

Thanks! Yours sounds cool too!

Raz1r Knex Bull3t (author)2013-08-03

Dude, this is sick! Why didn't I ever think of this?!?!?! Pretty sweet man, you get my vote. : )

Thanks! :)

No problem! : )

nerfrocketeer (author)2013-08-04


What does that even mean? :P I'm confused.

Look at it sideways! Its a smiley face with a mustache!

:O Oh, ok. :P

DarkOwlProductions (author)2013-08-04

:3 Awesome. That's all I have to say.

I voted and favorited. :P

Oh, and nice job getting featured. :D

Thanks 2X!!!

You're welcome x2 combo. :P
  ,     ,
 (O,O) <(You're welcome) 
   I    I

  ,     ,
 (O,O) <(You're welcome)
   I    I

loopyloop75 (author)2013-08-03

The things you can do with K'nex


About This Instructable




Bio: Hello! I'm Nerfrocketeer, also known as Nefrock', Nerf, or NK. I am an avid fan of Nerf wars, engineering, and animal activism (but no ... More »
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