Wheeeee, thats a blast from the past, that was my first ESC, but the pro version with 6.5 turn motor (and a fan on the ESC!)
http://www.logicrc.com/?ItemId=M-FS-...,c:50-30-20-30
There's the data sheet from the importer.
Looks like it should be OK down to 8.5T if its the race ESC (which is what should be bundled with the 10.5)
If it is the pro ESC, you'll have more margin than you know what to do with!