Going from 172.5mm to 170mm cranks

[Soloist604]

Hi all,

So a crankset that I recently bought only comes in 165mm, 170mm, and 175mm sizing. I've generally been running a 172.5mm on my bikes for years. I ended up buying the new crankset in the 170mm size and did a test ride yesterday.

Didn't think I'd notice a difference but when out on the test ride everything just felt "right". I couldn't have imagined that a 2.5mm change would make that much difference, but something just felt better. The q-factor on the new cranks is also about 5mm wider so this could also have contributed.

Thoughts from those with a bit more experience appreciated.