[porthole]

Hi-spec wheels (which is the supplier for the last several years) specs are:

Lug Size Ft/Lbs Torque
1/2" 90-120
9/16" 120-140
5/8" 140-160

275-325, that number is absurd and many people probably couldn't torque to that level properly anyway, or at the minimum need a torque multiplier.