A 34T cog is about 12% easier to peddle then a 30T. For short steep climbs it helps, Sometimes we can just hunker down and go, Knowing we get to rest in a few minutes. But for long climbs with no rest in sight, it makes a much greater difference.
I don't know why, But when climbing the short challenging hills in my area I feel much better at a lower cadence (60 rpm) then my normal 75 rpm for cruising. I have never ridden very far on hills, But it makes sense to me to try to maintain our normal cadence and power on long hilly rides.
Last edited by xroadcharlie; 08-08-21 at 12:41 PM.