Another Tri-Track motor upgrade Q

I realize this has been asked plenty of times but I’m just checking the latest…

I have the tri-tracks with the stock GHM-02 motors. I would like more power AND speed if possible. I think the safe upgrade is the GHM-13, but I’m wondering if these would be compatible:

pololu.com/catalog/product/1104

My primary concern would be shaft length.

I’m driving the motors from a RoboClaw 2x5A.

p.s. Here’s my ring bearer bot: farm8.staticflickr.com/7322/9597 … e367_o.jpg

Mounting hole dimensions seem to be fine (3x M3 at 31mm diameter).
The shaft does seem to be shorter, though the set screw should be ok…
If the robot is not wearing pants, does that mean he’s streaking?

The ring bearer bot is awesome!

Thanks for the verification.

Also, show me a robot that is wearing pants. :wink: