Originally Posted by
aixaix
I have several TTT stems with 7mm allen bolts. A 7mm wrench, unfortunately, is not commonly found in allen sets. It is also right between 17/64" (6.75mm) and 9/32" (7.15mm) so a fractional allen wrench won't fit. A little hunting around on the internet will turn one up, however.
Just go to your local Sears. And I would think HD and Lowes might have them also. If you are flush there is Snap On. If you are a poor college student (as I was at the time) you take a file and reduce an 8mm. I still have it.