I'm currently searching for a crank for my bike. My cheap china pedal came out of the arm on my crank. I think it uses a weak insert into the crank, which strips out easily. I read other users have the same issue with this crank.
I'm going to upgrade the crank, but I'm unsure how to do it. I have a square taper on the crank. 46T on the front, and a 7 speed shimano gear set on the back.
I found a crank that other people say fits, but it's for a single speed bike. People suggest that it may not shift smoothly. Others say they have the 7 speed, and it shifts the same regardless. This crank is called:Pure Fix 44T Fixie Crankset for Fixed Gear Bike

It's on Amazon for $44. It's for fixed gear bikes but can sort of work on multi gear bikes (or whatever you call them).

My question to you: If I wanted to swap out the front crank, and buy a different chain ring, how do I know what to look for? Is that what the difference is between 1/8 and 3/32 chain rings?
I'm guessing the 3/32 allows the chain to move around if it needs to, so the chain at the rear of the bike can slide onto the different shimano gears?
Is there a visible difference I should be looking for?

And finally, for the price, should I approach the front crank this way? Or are there better price avenues for getting a new crank with a certain chain ring?
Super thanks!