Originally Posted by
bobslee
@
Polaris OBark, I have 2x9 Sora up front.
If I understand you correctly, all I need to purchase would be GRX 46/30 and change to a 36T cassette in the back, right?
From every option mentioned here (again, thanks everybody, so helpful ❤️) that seems like the most obvious one and would give me what I need in terms of gearing.
Is there anything else I should take into consideration? Will I just be able to swap my 50/34 chainrings for the GRX and that’s it? Can I just swap my current 34t cassette in the back for a 36? Or would I run into new problems that I am not currently foreseeing?
Newbie here
If you want to get the 30T chainring, you need a different crankset than what you have now, i.e., you need to get something like the GRX 46/30 crankset/chainring combination. The whole thing costs $150.
It is possible you might need a GRX front derailleur as well. I didn't, but YMMV.
The 36T cassette is a second option, which you can do by itself or in combination with changing the gearing in the front.