Torque wrench specs & features for small to medium jobs I'm looking for advice on the range of torque, bit pieces and any other features I might need for smaller to medium sized jobs. 

From what I read I'd need a separate wrench for the bigger jobs like bottom bracket. I'm not sure about pedals: I'm running Shimano M520 and I haven't seen them installed with a torque-adjustable wrench before, just a pedal tool. Would a non-calibrated pedal tool be alright for installation + removal?

I'd like to be able to work on things like handlebars, headset, derailleurs, crankset, brakes, shifters, racks, seatpost, &amp; similar sized jobs.

The only carbon parts are the forks and the seat post. The largest hex bolt I've found so far is 5mm. The bike is a 2019 Fastroad SL-1, details are here https://www.giant-bicycles.com/au/fastroad-sl-1-2019

Some examples of specs for reasonably priced wrenches that I've found so far are: 


2-15nm adjustable torque click type, Hex: 2/2.5/3/4/5/6mm, Torx: T10, T25, T30, one-way torque
2-24nm adjustable torque click type, Hex: 3/4/5/6/8/10mm Torx: T20, T25 &amp; T30, one-way torque


I'm leaning toward something click-type in the 2-15nm range: The bits seem to be more suited to bike component size, and I don't think any of the jobs that I could be doing with Hex / Torx ends require more than 15nm. I'm having a bit of trouble finding confirmation on that for all components though.

Some other considerations I'd like to nail down are: 


Do I need two-direction measured torque for any of these jobs? Pedals probably won't be handled by this size wrench I'm guessing, BB seems way off. 
Would a beam style wrench be just as good, or more suitable than a click-type?
Am I overlooking any bit adapters that I might need?
Do I actually need two wrenches for all the jobs I'd like to handle?
Am I overthinking things and will be fine without a calibrated tool?
Would a beam style wrench be just as good, or more suitable than a click-type?


Definitely not. With a beam-style wrench you have to accurately observe where the pointer is on the scale. That means you have to be looking straight-on at the scale. Bicycle bolts are at all angle and orientations, which means looking at the scale will be very awkward.