0-SPRK-01 Track Sprocket - 6 Link (Pair) <p><font color="262626" size="2" face="Arial, Helvetica, sans-serif">Works with the <a href="0-HUB-02.html">Universal 6mm Hub</a> and <a href="0-HUB03.html">4mm Hub</a>.<br /> Sprocket diameter with tracks is 2.75"<br /> Pitch diameter (calculated, not measured) 2.14"<br /> Designed to be used back to back for a dual sprocket config.</font></p>
Robot MarketPlace - Track Sprocket - 6 Link (Pair)
Please see this product on the new Robot MarketPlace web site. Click here
Works with the Universal 6mm Hub and 4mm Hub.
Sprocket diameter with tracks is 2.75"
Pitch diameter (calculated, not measured) 2.14"
Designed to be used back to back for a dual sprocket config.
$7.95 
Aluminum Universal Hub set of two - 4mm
Aluminum Universal Hub set of two - 6mm
Track - 2in. Wide x 21 links ~23in. (single)