On April 18, 1960, California Highway Patrol officer Jim Davis rode into the hills of the Sacramento Valley and asked a group of men for directions.
They wanted to ride down a steep, rocky hill and up a flat, grassy hillside to a place called a bicycle tube.
“The bike tube is for your use, sir,” Davis told the group.
“We can’t ride around on this bike tube.”
They gave Davis the directions and rode up the hill, toward a paved trail that was lined with bike paths.
It was a beautiful day and the trails were lush.
It had never been done in California.
But the bicycle tubes had been installed and were ready for use by the local bike riders.
By the time Davis got to the top of the hill he was surrounded by a group waiting for him.
He took a couple of minutes to ask one of the men if he wanted to come along with him.
The man shook his head no, Davis said, but instead turned to Davis and said, “You can’t come on this bicycle tube.”
Davis, who was riding the other bike, responded, “Why not?”
The two men then left the hill and headed up the road.
Davis’ frustration with the cyclists was obvious.
Davis, a former member of the California Highway Police, was the only officer on the trail and he had just lost his job, he recalled later.
“I said, ‘We’re the only police officer out here.
It’s my job to tell you what to do.
We’re going to be riding your bike,'” Davis said.
When Davis and the other officer reached the top, they saw the tubes had broken off and the trail was littered with debris.
“This was the first time that I’d seen that,” Davis recalled.
“So I said, [to the other officers], ‘Well, we can’t get the tube back.
We can’t go back and fix it.'”
The tubes were a nuisance.
They were often the only part of a trail that the officers could see.
Davis decided to repair the bike tube and put it back together.
“And that was the end of it,” Davis said in an interview.
The problem had been with the tube.
The tubes had not been inspected before being installed and the tube had broken, Davis recalled in his book, “The Bike Trip.”
Davis told other officers that he had never seen such a simple problem before and that he could do nothing to help.
But when he was later called in to help the rest of the department with repairs, he saw the need for a better inspection.
“It was obvious that we needed something to check to make sure that the tubes were working properly,” Davis wrote in “The Bicycle Trip.”
“I could see the tubes and see the holes and see that they were working, but I could not see what was wrong with the tubes.”
Davis took on the project himself.
He built a test tube out of a piece of aluminum tubing and set up a camera and other equipment to observe the damage.
It turned out that the tube, which was a quarter of an inch thick, had broken.
The tube was about five feet wide and six inches long, but it was only half an inch wide.
“To me, that was a major, major problem,” Davis later told The Associated Press.
The incident inspired other officers to come up with similar designs for tubes.
Davis said the tube problem led to the creation of the bicycle and traffic control bicycle, which is now part of California law.
Davis eventually left the bicycle department and started a bicycle shop in Oakland, where he became a bicycle mechanic and later helped found a nonprofit called the California Bicycle Association.
Davis also started an organization called the Association of Bicycle Maintenance Engineers.
But he still didn’t know how to fix the tubes.
In 1972, Davis started a motorcycle club called the American Bicycle Association and he continued to work with bike repair groups.
He met with his daughter, Joan, and she persuaded him to start his own bicycle shop.
Davis bought the shop in 1976 and began making bicycle tubes.
He still had a long way to go.
Davis made the tubes out of two pieces of tubing and used a tube wrench to hold them together.
Then he built a prototype of the tube and tested it with his wife and son.
“You had to know that the wrench was the right tool,” Davis explained in an earlier interview.
“Once you were able to see that it was working, then you had a real confidence that it worked.
You could see that there was a tube that was working and that you were actually getting a bike tube.
That was a really big breakthrough.”
He installed about 20 bike tubes and made sure that his tubes were functional.
“They were pretty reliable,” he said.
Davis was surprised to find that the tubing didn’t seem to work.
He realized that the problem was not with the tubing, but with the way the tubes looked.
The tubing on his bike was thin and did