I have the 9 1/2 ride triad boot that has a reduced foot print and it just barly fits my s/m 390 boss. I have the toe cap maxed out and it was a pain getting it to start ratcheting at first when on hill trying to strap in. It has stretched enough after breaking in that it's not a hassle anymore, but I don't think even a half size bigger boot would fit them to be honest. So if your in a size 10 I'd say the l/xl especially if it's not a reduced foot print.
Academy Propaganda rev - Rome 390 Boss
New for 14-15
Yes the Basic - Now IPO