just get aftermarket slim fan...12" is the easiest fit to the front side.....and more efficient for the AC condenser as well
Noted......will install AVS hi speed fan 12"the biggest fan u can install at front of our trek is 12 inch.. and its also hanging at upper side of condenser. better get the high speed one since mine are not high speed one. mine are also AVS so far no temp. issue. another option is evo 789 front fan. but that fan is too thick and no guarantee reliability.