bottom bracket and crankset

[montana]

i'm trying to upgrade my 2000 giant ocr2 road bike with a new bottom bracket and crankset. in my quest, i realize they come in different categories. how do i know if my bike requires square taperd or splined? any tips? much appreciated.

[Speedub.Nate]

i'm trying to upgrade my 2000 giant ocr2 road bike with a new bottom bracket and crankset. in my quest, i realize they come in different categories. how do i know if my bike requires square taperd or splined? any tips? much appreciated.

Your frame only requires a specific shell length - 68mm.

Because you are choosing a new crank and bottom bracket, all you have to do is ensure the new bottom bracket is compatible with the new crank. Square taper, splined, integrated... your choice!

[DirtDawg]

i'm trying to upgrade my 2000 giant ocr2 road bike with a new bottom bracket and crankset. in my quest, i realize they come in different categories. how do i know if my bike requires square taperd or splined? any tips? much appreciated.

First take a look between the bottom bracket tube of the frame and the crank, if its a square tapered bottom bracket you will be able to see it right at the inside of the crank arm (side closest to the bike), the shape will be square(imagine that). It would be better if you pulled the crank arm off the bike to be sure because if it is a splined bottom bracket then you need to know what type because there are different types of splines also. You can get a complete crank set that comes with a bottom bracket, but you need to know what the shell size of the bottom bracket is.
Good Luck.

[string]

Square Taper or splined is the interface between the bottom bracket and crank. It is not frame specific.

What you need to determine is your bottom bracket shell width which is specific to your frame and spindle length (the lenght of the bottom bracket axle).

When you pick your new bottom bracket and crank, you need to make sure they are the same interface to work together and size them based on your frame.