Part no. T-2213 | This replacement knob is specifically for any trainer manufactured after 2007 and with a serial number of 50000 and larger. This new tension knob features our newer design which is stronger and more durable. We suggest replacing the old knob with our new design.

(Click on this link if you have a GRAY TRAINER, MANUFACTURED BEFORE 2007, and need to replace the L-bolt and tension knob)