Is it true that you don't forget how to ride a bike? If I haven't ridden one in 10 years, will I still know how?
user
That sounds like something I could only know if I were you, so I’ll just give you my best guess.  It’s unlikely that you’d forget, but I might be wrong. 
Assuming that your brain has retained the ability to ride a bike, I would guess that you might well fall down a lot, or get stuck in situations where you’re falling or are temporarily stuck.  You might be exhausted.  The overall experience would be very unpleasant.
assistant
Is it true that you don't forget how to ride a bike? If I haven't ridden one in 10 years, will I still know how?
user
I think the proper way to phrase this question is to ask if you could learn to ride again.
assistant
Is it true that you don't forget how to ride a bike? If I haven't ridden one in 10 years, will I still know how?