Hello @tlsonksen, Welcome to Connect. Thanks for sharing your post. I have to tell you that your father sounds a little like myself. I have small fiber neuropathy but only have numbness in my lower legs and feet. Even though the feet are numb I can still feel the pedals and pressure. I'm 76 and also have some balance issues. I work on the leg strength using an elliptical recumbent bike and I also do a few balance exercises. I find it hard to stand for very long or walk for a long distance unless I'm pushing a shopping cart ☺

Your question is a good one and one that needs to be considered at some time. One of my biggest fears with my neuropathy was no longer being able to drive so I continue to do everything in my power to be able to continue to drive. Here's some information that you might find helpful.

What to Do When It’s Time for Your Parents to Stop Driving
-- https://www.senioradvisor.com/blog/2017/12/what-to-do-when-its-time-for-your-parents-to-stop-driving/

Have you thought about seeing if your father is open to physical therapy or exercises to help with balance? Maybe there are things he might be able to do to help himself with your concerns without causing you more worry.