#510 Favourite Brick Friday: Rubber treads
This week's favourite brick(s) are the rubber treads; which are still used in LEGO sets but are being used less and less compared to others.

These particular width of treads have a unique connection, because not only do they fit with gears, but 1x2 tiles and grills can attach fairly securely to the treads. This can allow you to include a variety of colours in the design, such as -Mainman- from Flickr's use of the small treads: https://www.flickr.com/photos/mainman/3307427919/in/pool-788191@N24/
Zach on Flickr also uses the rubber treads, but the larger version and attaches 1x2 grills to create a much more interesting texture and grip compared to just the rubber surface:
https://www.flickr.com/photos/zachmoe/2295149857/in/gallery-coleblaq-72157622451259048/
Here are the pieces on Bricklink: https://www.bricklink.com/v2/catalog/catalogitem.page?P=x939&idColor=11#T=S&C=11&O={"color":11,"iconly":0}