Hi there, I wonder if you may be able to help...
My gravel bike doubles up as my winter road bike/trainer and as such I'd like to be able to continue to use my 4iiii left sided power meter on it when used for these duties.
It currently has 50/34 105 chainset and 11/32 cassettes across two wheelsets (winter road, and grav).
Mechs are r8000 with fd being the gs (medium cage) version
I'd really like to lower my gearing, quite significantly if possible, but maintain the instant interchangeability of my two wheelsets.
I'm thinking my options are:
GRX 46/30 chainset - downside: costly, requires grx fd as well, probably not easily available
2 x 11-34 cassettes + longer chain - downside: also costly, not huge change in gearing (1:1 lowest ratio with current 11/32 cassettes, rather than the 0.94 ratio afforded by going 30t chainring per option 1 - is this a significant difference? )
Am I missing anything here? I have searched and there doesnt seem to be much in terms of shimano hollowtech 2 compatible 46/30 chainrings on the market.
I Could however be overlooking something very obvious!
Reason I'm asking btw is that I notice that on very steep off-road climbs I often can't pedal with low enough power to both a) keep moving while b) keeping my front wheel from lifting off the ground, it's rather frustrating!
Many thanks in advance for any help and wishing you a fab Easter weekend ahead :)