In a jumble of bicycle frames, six burly men in drab gray overalls tinker with blue, purple and pink children's bikes, checking brakes and gears to make sure all will be in order for their future owners in Africa.

These inmates at the Hermanice prison in the eastern Czech city of Ostrava have volunteered to fix old bicycles for a charity serving rural Gambia, where children use them to reach distant schools.

Surrounded by tools and air pumps, the inmates check wheels, bicycle chains and gears in two prison workshops under the watchful eye of armed guards.

Vaclav, a bearded 35-year-old serving 20 months for theft, expertly fastens brake pads on a blue BMX-type bike with thick, black tires.

"I'm here to learn something, to perfect my skills," says the former soldier who was homeless before he ended up in prison.

"It's good to know someone will use these bikes - they're not the newest," he said.

Karel, a tall, tattooed construction worker who looks much older than his 46 years, is also serving time for theft.

"If it helps people, it's a good thing," he says bashfully.

Unlike other inmates who sort scrap metal or dismantle old cars for cash, the bike crew work for free.

Aside from a sense of satisfaction, they receive small perks including coffee or cigarettes and a good word to courts ordering their probation, says deputy prison chief Petr Cejka.

Since September 2013, prisoners have repaired more than 1,600 bikes - four container loads that were then shipped to Gambia.

"It costs about 100,000 koruna ($5,000) to ship one container," said Roman Posolda, head of the Bikes for Africa charity, now starting its third year in the country.

Tall, thin and sporting a pony tail, the 42-year-old once cycled around the globe.

He drew inspiration for the charity from a similar project in Britain, where he spent years working with at-risk young people.

Free-wheeling charity

Speaking from the Gambian capital Banjul, coordinator Babucarr Touray said the bikes are a treasure for local children who must travel up to 9 km to school every day.

"Transport in some parts of the Gambia is impossible," he said, calling the program "really helpful".

The children use the bikes "purely to acquire education. We have holidays now and all the bicycles had to come back to school."

Participating schools have a teacher and student trained to do repairs using tools also supplied by the charity and spare parts from bikes broken down beyond repair.

So far, Czechs have handed over some 15,000 bikes to the charity, which operates 120 collection points nationwide.

"We get bikes ranging from very good and new to very old. Only half are suitable for the African terrain," Posolda said.

Mountain bikes prevail, but he says that simple single-speed Czech-made bicycles with coaster brakes able to stand up well to sand and dust are ideal.

The most recent shipment in May delivered more than 800 bikes to nine schools in Gambia, a west African country that was a British colony until 1965.

Despite having cycled the globe, Posolda has given up long-distance bike trips for the moment as he waits for his "small kids to grow up".

"I'd rather help others ride. And that makes me as happy, as if I would be cycling myself."

(China Daily 07/25/2014 page10)