Power meter compatability for old(ish) bike

[millwaj78]

Hi all. I'm not very clued up on all things bikes / parts - I just get on the saddle, pedal hard and pay a fortune for new stuff every once in a while. After selling my old vector pedals around 4 years ago, I've been powerless for a while and I'm now looking to dive back in. The issue is, I haven't a clue how to determine whether my current bike is compatible with the various options out there. I don't want to go back to pedals (bad memories with the vectors), and like the look of the 4iiii left only crank, and the quarq dzero spider after some desktop research.... I want something pretty cheap and I'm not fussed about super-precise accuracy... just something that works easily (connectivity, durability).

The bike I want to add power to is a Trek Domane Six Series. Think it's a 2015/6 model. Dura Ace (not sure which model exactly, says FC-9000 on inside of the crank), with no mods other than new wheels. Does that give you enough info on the bike to provide me with some recommendations on which power meter I can buy that meets my needs? Any advice greatly appreciated.

[blizzard]

Well the easiest is the Favero ASSIOMA power pedals... These are generally highly regarded as some of the most accurate and fuss free power options (much better than the original Vector pedals)

If you are dead set against power pedals any 4iiii Shimano left only road crank arm should work. Make sure you get the length that matches your current cranks. Visually they probably won't match.

[sir_camel]

With DA9000 cranks I am fairly sure you can use a 105 5800, Ultegra 6800 or DA 9000 Stages, 4iiii or Pioneer crank arm power meter. Just make sure it's the matching crank length. Will most likely be 172.5 or 175. Also etched on the crank arm.

If you want a Stages Ultegra 6800 one with 172.5mm arms shoot me a message as I'm selling one.