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I'm on the hunt for powermeter crank to swap my Quarq out with on the Mason that will support something like 28/44 chainrings without bumping the q-factor like MTB cranks.
hippy-
Low gears - road Q factor - power meter -> probably a 'choose 2' situation unless you stump up for pedals?
Close is this - https://www.sram.com/en/sram/models/pm-riv-w-d1
- 43/30
- chainline is 47.5 so new derailler required
Rotor will do you 46/30 on a 43.5 chainline but that's £700+
- 43/30
stelfox
24mm gets you Sugino, Middleburn (both pricey), or Shimano GRX - that will need new derailleur as the chain line is different. Also Shimano road + absolute black rings (which themselves are 160 for 48/32).
Rotor Vegast arms and 46/30 direct mount can be had for £220 from bikeinn. Easton I think is a little more expensive (nearer 300). I don’t know of any 110x5 options aside from praxis for sub-compact.