since the teeth are angled, they run Considerably quieter than the more affordable straight-Reduce metal gears. It took me some time to uncover this tear-down pic verifying that the gears had been helical. Pic courtesy https://leaatxo954209.collectblogs.com/74506903/the-smart-trick-of-talaria-sting-r-mx4-specs-that-nobody-is-discussing