<p>You just need to flip the small motor the other way!
<a href="https://i.sstatic.net/mtBwl.png" rel="noreferrer"><img src="https://i.sstatic.net/mtBwl.png" alt="enter image description here"></a></p>

CC BY-SA 4.0
2019-05-02T15:38:06.433Z
The motor is indeed mounted upside down, which could result in the grey parts sticking out far enough that the wheels do not touch the ground anymore.
zovits
CC BY-SA 4.0
2019-05-02T10:17:17.330Z
2019-05-02T15:39:46.750Z
2019-05-02T15:39:46.750Z
Torinator Productions
<p>Our <a href="https://www.lego.com/en-us/mindstorms/build-a-robot/spik3r" rel="nofollow noreferrer">Spik3r</a>'s wheels move but the Spik3r itself does not move. Please see the picture of the back of the vehicle - is it somehow incorrectly built?</p>

<p><a href="https://i.sstatic.net/y5WMs.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/y5WMs.jpg" alt="enter image description here"></a></p>

CC BY-SA 3.0
2017-12-19T22:40:10.617Z
That wheel with the blue connector through it...does that rest on the ground? Because it cannot turn...
Rory Alsop
CC BY-SA 3.0
2017-10-09T07:39:15.370Z
So the motor-powered wheels roll freely when you hold the model up? And when you put it down on the floor it won't move? The insect-like legs are designed to be moved by the forward motion of the model. Check that these two leg sections are not blocked.
Gruber
<ev3><mindstorms>
Spik3r wheels move but the spik3r itself doesn't
Helena
# Spik3r wheels move but the spik3r itself doesn't

(Asked by: username_0 on 2017-09-29)

Our [Spik3r](https://www.lego.com/en-us/mindstorms/build-a-robot/spik3r)'s wheels move but the Spik3r itself does not move. Please see the picture of the back of the vehicle - is it somehow incorrectly built?

[![enter image description here](https://i.sstatic.net/y5WMs.jpg)](https://i.sstatic.net/y5WMs.jpg)

**Tags:** ev3, mindstorms

> **Comments:**
> **username_2**: So the motor-powered wheels roll freely when you hold the model up? And when you put it down on the floor it won't move? The insect-like legs are designed to be moved by the forward motion of the model. Check that these two leg sections are not blocked.  
> **username_1**: That wheel with the blue connector through it...does that rest on the ground? Because it cannot turn...  

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## 1 answers

### Answer by username_3 on 2019-05-02. Score: 5

You just need to flip the small motor the other way!
[![enter image description here](https://i.sstatic.net/mtBwl.png)](https://i.sstatic.net/mtBwl.png)

> **Comments:**
> **username_4**: The motor is indeed mounted upside down, which could result in the grey parts sticking out far enough that the wheels do not touch the ground anymore.  

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