Answers.Body: <p>While it is technically not a rubber wheel, you can use an axle with a half-bush and with an additional rubber band to provide grip. Tensioning the band between two such axles will form a short conveyor belt with a rubbery surface, which could be used for transporting balls when surrounded by appropriate elements to form a channel:</p>
  
  <p><a href="https://i.sstatic.net/PrtLE.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/PrtLE.png" alt="quick-and-dirty MS Paint sketch"></a></p>
  
  <p>(the black lines are axles, the grey ovals are half-bushes, the red freehand-circle is a rubber band and the round spotty ugliness is supposed to be my rendition of a LEGO football)</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-19T13:44:31.350Z
Answers.LastActivityDate: 2018-12-19T13:44:31.350Z
Answers.UserDisplayName: zovits
Answers.Body: <p>I think the smallest one in diameter is the tire <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=3641&amp;idColor=11#T=P&amp;C=11" rel="noreferrer">3641</a> </p>
  
  <p><a href="https://i.sstatic.net/8PiHx.png" rel="noreferrer"><img src="https://i.sstatic.net/8PiHx.png" alt="enter image description here"></a></p>
  
  <p>with the bush <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=4265c&amp;idColor=9#T=P&amp;C=9" rel="noreferrer">4265c</a>.</p>
  
  <p><a href="https://i.sstatic.net/1ceqS.png" rel="noreferrer"><img src="https://i.sstatic.net/1ceqS.png" alt="enter image description here"></a></p>
  
  <p>Alternatively, you can use the tire <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=3139&amp;idColor=11#T=P&amp;C=11" rel="noreferrer">3139</a></p>
  
  <p><a href="https://i.sstatic.net/N3gAo.png" rel="noreferrer"><img src="https://i.sstatic.net/N3gAo.png" alt="enter image description here"></a></p>
  
  <p>which has a smooth surface and also compatible (but a little bit loosely) with the same bush.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-29T14:02:41.393Z
Answers.LastActivityDate: 2018-10-30T02:38:56.117Z
Answers.LastEditDate: 2018-10-30T02:38:56.117Z
Answers.UserDisplayName: BalazsToth
Body: <p>What the smallest rubber wheels that can be turned by a Technic axle?</p>
  
  <p>This is what I have so far</p>
  
  <p><a href="https://i.sstatic.net/PS8rU.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/PS8rU.png" alt="enter image description here"></a></p>
  
  <p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=4288#T=S&amp;C=11&amp;O" rel="nofollow noreferrer">Wheel Full Rubber Balloon with Axle hole #4288</a></p>
  
  <p>Background: I'm building a GBC and I want to push the balls at speed across an open area. I plan to hide small spinning wheels in the opening they go through and assume that rubber tyres are the best solution.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-29T02:04:10.917Z
Comments.Text: There are some small tires that fit on half-bushings.
Comments.UserDisplayName: Alexander O'Mara
Tags: <technic><piece-information><wheel>
Title: Smallest rubber wheel that can be turned by a technic axle
UserDisplayName: Craig
ThreadText: # Smallest rubber wheel that can be turned by a technic axle
  
  (Asked by: username_0 on 2018-10-28)
  
  What the smallest rubber wheels that can be turned by a Technic axle?
  
  This is what I have so far
  
  [![enter image description here](https://i.sstatic.net/PS8rU.png)](https://i.sstatic.net/PS8rU.png)
  
  [Wheel Full Rubber Balloon with Axle hole #4288](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4288#T=S&C=11&O)
  
  Background: I'm building a GBC and I want to push the balls at speed across an open area. I plan to hide small spinning wheels in the opening they go through and assume that rubber tyres are the best solution.
  
  **Tags:** technic, piece-information, wheel
  > **Comments:**
  > **username_1**: There are some small tires that fit on half-bushings.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2018-10-29. Score: 9 | Accepted answer
  
  I think the smallest one in diameter is the tire [3641](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3641&idColor=11#T=P&C=11)
  
  [![enter image description here](https://i.sstatic.net/8PiHx.png)](https://i.sstatic.net/8PiHx.png)
  
  with the bush [4265c](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4265c&idColor=9#T=P&C=9).
  
  [![enter image description here](https://i.sstatic.net/1ceqS.png)](https://i.sstatic.net/1ceqS.png)
  
  Alternatively, you can use the tire [3139](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3139&idColor=11#T=P&C=11)
  
  [![enter image description here](https://i.sstatic.net/N3gAo.png)](https://i.sstatic.net/N3gAo.png)
  
  which has a smooth surface and also compatible (but a little bit loosely) with the same bush.
  
  
  ---
  
  ### Answer by username_2 on 2018-12-19. Score: 3
  
  While it is technically not a rubber wheel, you can use an axle with a half-bush and with an additional rubber band to provide grip. Tensioning the band between two such axles will form a short conveyor belt with a rubbery surface, which could be used for transporting balls when surrounded by appropriate elements to form a channel:
  
  [![quick-and-dirty MS Paint sketch](https://i.sstatic.net/PrtLE.png)](https://i.sstatic.net/PrtLE.png)
  
  (the black lines are axles, the grey ovals are half-bushes, the red freehand-circle is a rubber band and the round spotty ugliness is supposed to be my rendition of a LEGO football)
  
  
  ---
  
  