A close-up shot of a mountain bike tyre tread. 
This image has been released under Creative Commons. This means we're more than happy for you to use it in any way you wish, provided that you include attribution in the form of a link to our website <a rel="nofollow" class="external free" href="http://www.tredz.co.uk/">http://www.tredz.co.uk/</a>
<a href="//commons.wikimedia.org/w/index.php?title=User:Alextredz&amp;action=edit&amp;redlink=1" class="new" title="User:Alextredz (page does not exist)">Alextredz</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>