18-04-2014, 07:12 AM
^^ The pedals are connected to cranks, which have an axle that runs through the bottom bracket which is a housing for bearings 
Matt, what bike is it to start off with? Is it a pre-built (e.g. a Mongoose, GT, etc.) or something that you built up previously? If it's the former, you may well be better off just buying a new one as new bikes are relatively (relative to the cost of the sum of the parts separately) cheap these days, and you can get a lot for your money.
If it's an older pre-built bike, then you most likely have a "1-piece crank" where one of the cranks has the axle as part of it, and the other crank bolts on to the other end once it's in the bottom bracket. This is most likely what you have since a 3-piece crank is quite obvious on how to take it apart.
1 piece will generally be shaped like this:
![[Image: One-piece_crank.JPG]](http://upload.wikimedia.org/wikipedia/commons/6/61/One-piece_crank.JPG)
3 piece - notice the shape is different, and the bolts on the front are on either side which thread into the axle:
![[Image: 25239d1324073558-__20-bmx-bike-3-piece-c...150026.jpg]](http://truestreetcars.com/forums/attachments/non-automotive/25239d1324073558-__20-bmx-bike-3-piece-cranks-gyro-etc-img_20111216_150026.jpg)
www.alansbmw.co.uk is a good place to get started and take a look around for parts, or check out guides on youtube for how to take apart a bmx.
Matt, what bike is it to start off with? Is it a pre-built (e.g. a Mongoose, GT, etc.) or something that you built up previously? If it's the former, you may well be better off just buying a new one as new bikes are relatively (relative to the cost of the sum of the parts separately) cheap these days, and you can get a lot for your money.
If it's an older pre-built bike, then you most likely have a "1-piece crank" where one of the cranks has the axle as part of it, and the other crank bolts on to the other end once it's in the bottom bracket. This is most likely what you have since a 3-piece crank is quite obvious on how to take it apart.
1 piece will generally be shaped like this:
3 piece - notice the shape is different, and the bolts on the front are on either side which thread into the axle:
www.alansbmw.co.uk is a good place to get started and take a look around for parts, or check out guides on youtube for how to take apart a bmx.