how do you know what size your bottom bracket is?

I am around 4 feet and somthing inches, I am 75 pounds. And if there is other things you might need to know tell me. And plea...

I am trying to figure out my chainring size for my fixedgear but im not sure what to measure. I want to change my gear ratio...

I am going to try bmxing and I dont know much about it but I want to try I am 6 feet tall and I dont know what size bike I sh...

Are roller blade shoe sizes the same as regular shoe sizes or is it different and if its different can you give me what it wo...

Next year I'll be a freshman at a class B school. [that refers to the size, but what exactly does it mean?] Also, how hard ...

How tall is a tetherball pole in regulation???Rope too please???

Im looking to buy a new PRO scooter cause i want to try scootering and idk how to figure out the size of handlebars

The pink and black one with the heartagram that says bam at the bottom.

how do I know if my pointe shoes are to tight? I know they are suppose to be tight and hurt obviously but my toes are scrunch...

My family and I are doing this Hunger Game thing and I got district 2, unfortunately i hardly know anything about it, so if u...