Adjustable mesh geometry,Create a mesh with adjustable geometry

Hi all!

I am looking to create a game where you can ride a bike through various levels, such as a skatepark.

I would like to make the bike geometry user adjustable (ex. change frame size, wheel size, headtube angle, etc) from some kind of "Bike Creator" menu, kind of like a Character Creator menu. This means that once you create your bike, the geometry is set and couldn't be changed from in level.

I am currently investigating creating a model in Blender and using Bones to define the bike geometry. However I'm not sure if that is the right approach because my understanding is that is usually used for animation.

I am having a tough time figuring out how to accomplish this, and could use some high level guidance to point me in the right direction.

I would appreciate any pointers or tips to set me on my way. Thanks!