Intro (video): http://bit.ly/E-bike-novus 
All objects are logically named and have own material of the same name.
There are 4 types of "body" and "tire" materials.Assign "body type 2" and "tires type 2" (or 3,4) materials to the body and tires to change the colors.

You can download high quality Renders: https://zaya.io/nt4n4 

9 objects.
The body textures are 4k pbr, The saddle textures are 3k pbr.
Reset Xform,Unwrapped.

Archive: Max 2015 / obj + mtl / textures
System units: cm
polys: 180,358
verts: 180,865

Note: Who works with v-ray version lower than 3.1, pay attention to materials section BDRF (Microfaset GTR (GGX).

The wireframe render shows lowpoly topology. The Turbosmooth modifier is not collapsed.