Hi there,

if you want to have a power meter that works with Trek you'll need one with a 24mm axle, as 30mm axles don't fit in BB90 frames. You could go for the Rotor 3D (http://www.power2max.com/...-meter-with-cranks/I and use the Rotor BB30to24 bottom bracket (http://www.power2max.com/...to24-bottom-bracket/).

Edit: just saw and the frame you have isn't a BB30, it's a BSA frame with a square taper bottom bracket. So I would still go with the Rotor 3D and use the BB1 bottom bracket.

I hope this helps!

Best
Nicolas

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power2max
http://www.power2max.com/northamerica
official power meter of Movistar Team