Jim
Sam was the one to teach him how to ride a bike. It was before he left. Jim wasn't the best at learning and had falling over a lot. It wasn't until they went over to their grandad, that he learned to properly how to ride a bike.
Spock
He doesn't know how and he also doesn't see the need to ride a bike. Nyota did offer to teach him but it would be illogical duets his body mass being heavier on earth.
Leonard
He used to ride his bike to school everyday unless it was raining then his mother would drive him. He his would make sure he was the one to teach him.
Nyota
She loves to ride a bike back in Kenya, she couldn't do it so much in the city it wasn't safe enough.
Hikaru
After school he would always go to his grandparents before he run away to stay with them. He notice his grandad's old bike in the back room of their shop and had ask him to teach him to ride it he loved old fashioned things.
Pavel
He used to ride his bike a lot, he rode it round St Peterborough on to and from his high-school. When he was twelve in his last year of high school he rode his bike over a icey patch and flipped over breaking his jaw and collarbone. He hasn't riding a bike since.
Scotty
He never learned how to ride a bike, him and his Nan did love each other but they both had short tempers, it didn't help that she was trying to teach him on a mountain bike.
Jaylah
She thinks bikes are silly, using her feet is the best way to go.
Carol
Her dad did teach her but her mother most drove her away especially after her bike was stolen.
Christine
She hates it, she can dance for hours but riding a bike can kill her.
Gaila
Her mother got her a bike for her brithday one year, when her mother started to work longer hours and couldn't drop her off at school anymore.