IMO, not necessary and there's no reason to design and build bikes an a way that they are.
Most of the torque specs published and heeded so strictly, miss the point. Most fasteners on bikes need to be tightened enough to do the job, and n o more. For example, the toque spec given for stem clamp bolts aren't truly relevant to the task. The required torque is more related to the fit and traction between the stem and fork than anything else. Since that varies so much, it's naive to believe that a published torque has any hope of being right.
Torque specs, are useful as guides for mechanics, but with any experience, and willingness to trust your hands, the screw itself will tell you when it's properly tight.
If having a torque wrench makes you more confident, then buy it, but don't consider it a substitute for being aware of what's happening.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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