Chain line & bottom bracket issue/question
 

First off, I'd like to apologize if this is a stupid question. I am new to working on my bike outside of derailleur and brake adjustments, and have not been able to find my answer by searching.

My situation is that I have a 2000 Trek 6000 that needs a new drivetrain. I have installed a 73mm shimano un54 square taper bottom bracket with 113mm spindle length.

I have two cranks:
Shimano 7/8 Speed Alivio Mountain Bicycle Crankset - Square Taper - FC-M410
Which is giving me a chainline of 55mm
AND
Shimano FC-M361 Acera Crankset (Black, 175-mm 42/32/22T 7/8 Speed)
Which is giving me a chainline of 50mm

I wanted to use the alivio, and my understanding is that it should give me a 47.5 or 50mm chainline with a 113mm spindle length square taper bb. However, that is obviously not what I am seeing. Is this an issue with the particular style of bottom bracket that I chose? Should I have chosen something else? Is this crank not for a typical square taper BB or something?

Any help would be appreciated.

Are u sure you put a 113 mm axle in there? Did you measure it?

How far off the crank is from the ideal chain line you want??

Did you try the other crankset?

well, figured out where my extra 5mm came from. i pulled out the bb and it was marked 68mm. so, I had ordered a 73mm but was sent a 68mm. i guess i should have checked the bracket itself before installing it. lesson learned. thanks for the reply.