Help selecting crankset

[jeffmoali]

Hey guys, long time lurker here.

I finally pulled the trigger on a lightcarbon gravel 52cm frame (LCG071S-D)

https://www.lightcarbon.com/new-carbon-gravel-frameset-with-integrated-stem-system_p171.html

I’m scraping GRX components together and stuck trying to figure out what size crankset I need to go with.  My options are 170mm, 172.5mm, or 175mm.  I think this is the crank arm length.

This is my first bike build and I’m not really sure how to select the right crankset size for this frame.

Wondering if someone can share their thoughts on this.

[cst_jpr]

Have you google "determine crankarm length"?

The typical recommendations are based on your height. Since its a 52mm frame, most likely you want 165mm, but 170mm might be ok too. The difference does not matter much in reality. Although too long can cause knee issues.