Originally Posted by Marcus_Ti

The 1st problem with Torx generally is that it the shaping tolerances for both bit and fastener head need to be extremely tight.

The 2nd problem with Torx is economies of scale. Most bits and fasteners are made en masse to low machining standards, simply to improve the company bottom line and F the consumer, and consequently are not at all up to spec re: tolerances...which leads to...

Problem #3 ...premature wear of fasteners or bits or both.


If you use Torx...you have to use good quality fasteners and bits. It is a safe bet that your bit set in your $10USD Wally World toolcase that includes Torx is precisely the kind of thing I'm talking about. And in the FSA scenario you mention, I'd be skeptical of the FSA fasteners being up to spec either given FSA being a lower tier company typically used to save $$ by Bike Labels.