I just bought a new (to me) bike and need to switch to shorter crank arms. The 2021 bike came with Sram Force 1x cranks size 175mm, compete with a power meter. I need a 170mm and have been looking for a used part. I have always ridden Shimano equipped bikes so I have no idea what I can put on the bike. Any info would be appreciated.

Thanks

If you want to keep the power meter function, then any power meter cranks that are compatible with your bottom bracket will work. If you don't care about the power meter, then any cranks that are compatible with your bottom bracket are fine. If you are gong to change the BB, then you just need a crank set that matches the dimensions/type of your frame. You have not provided that information so no recommendation can be made.