Advice: Rig for faking bicycle riding
I'm making my first feature film in Japan, and I've got a very famous elderly actor who I need to make look like skilled road cyclist. He also needs to act during scenes while riding. The issue is that he's terrified to ride a road bike, and his balance, muscle strength, etc... are fading at his age. Considering it's my first feature and he's doing us a favor, I can't really risk him doing something that could potentially be dangerous and that he doesn't want to do. He's a great actor and will bring huge marketing value so it's worth it to go through the effort of making an illusion that he's a skilled cyclist.
Of course we're gonna use a body double as much as possible, and we'll probably try mounting the bike to the back of a truck and filming close ups or medium shots in the real environments that way (although will have to use a long lens or a low angle to disguise the fact that we're up so high off the ground) I don't want to use greenscreen or rear projection as I need to lighting, wind, etc... to match perfectly.
The issue is that I've always wanted to avoid having too many close ups in this movie. I want that look of a wide angle lens that's pretty close to the actors face, but we can see their full body in the frame. See the legs working etc...
So, I'm considering building some kind of rig that we can mount the bike to, almost like a big platform or longboard, and we can pull that platform with a motorcycle or small car, and that way we can perfectly control where the cycle is in comparison to other cyclists, and he doesn't have to worry about steering, balance, etc...
Does anyone out there have any advice or ideas on how to build such a cycling rig? I've looked at practically every cycling movie ever and I don't think I've seen anything like this before.