Hi,
Until quite recently, the cpu wheel from the website was actually the cuda 8.0 wheel  So a gpu wheel should be perfectly fine to use in a cpu-only environment (if you encounter any problem, do raise an issue as it should be the case).
The reason why we now have pure cpu binary is just because of size as the cuda ones are much larger and it’s nice to have a slim cpu binary.
One thing that has a big impact on wheel size in particular is the list of cuda architecture you provide it, so you might want to be careful with the exact cuda arch you build for to make sure it covers all your users (Some arch will work with code compiled for other ones but will be slower or won’t take advantage of new features).