They have become firmly embedded into Cambridge life – but sometimes ofo bikes are not used for the reason they were meant for.
In the last week ofo has pulled out of both Norwich and Australia but the bright yellow bikes have now become a familiar sight across our city.
The handy cycles are being ridden lawfully by the vast majority of people.
They have become so successful that a competitor to ofo has launched in Cambridge.
Mobike will started with a trial of 100 bikes after signing up to Cambridgeshire County Council's Code of Conduct for Dockless Bikeshare Schemes.
But ofo, which only started in Norwich in October, will withdraw its bikes from the Norfolk city over the summer as it looks to "cease operations" there, the BBC reports.
And ofo is one of two companies pulling out of Australias once burgeoning bikeshare economy, reports the Guardian.
Mobike and ofo
Although there's no sign of ofo pulling the plug of its Cambridge operation, the yellow bikes have sometimes been used for the wrong reasons in our city.
So here are nine ways ofo bikes have been used in a bizarre or criminal fashion.
A 'drug hub and homeless camp' in a Cambridge street has been 'intimidating to families living nearby' – and dealers riding ofo bikes have been reported supplying drugs to rough sleepers.
Residents called on police and Cambridge City Council to tackle what was described as "escalating 24/7 problems of drug taking" and "rough sleeping" in Hills Road between St Pauls Church and the HSBC Bank building.
The meeting heard how users were openly using crack cocaine pipes and syringes as people walk by.
And dealers were said to be using ofo bikes to push their drugs openly, according to residents.
Some people took full advantage of Cambridge's ofo bike sharing scheme, using them for the World Naked Bike Ride event.
A couple of the riders took off from Midsummer Common on the bright yellow bikes as they toured Cambridge in the buff.
The bikes were being used by riders aiming to share positivity: being good to the environment, reducing fossil fuels, encouraging people to love their body and trying to teach drivers to be better at sharing the road safely.
Hanging bike garden
This ofo bike was spotted dangling from the metal frame covering the memorial garden which was created on Christ's Pieces two years after the death of the princess in a Paris car crash in 1997.
Defiant ofo bosses insisted vandals will not ruin their city bike sharing scheme after the city's Princess Diana Memorial Garden was desecrated.
One of ofo's bright yellow bikes was spotted over a two-week period in Christ's Pieces and had been vandalised with the spokes cut and bent, making it unrideable.
It was then hung from the metal frame covering the much-loved memorial garden which was created on Christ's Pieces two years after the death of the princess in a Paris car crash in 1997.
Ofo long wait
Ofo claim that locked bikes are picked up within 12 hours once taken out of Cambridge.
Since our old office was in Milton, we tested that by putting a bike right outside and leaving it, waiting to see how long it would take before being picked up.
It was sat there for more than 12 hours – in fact it was there for three days before someone collected it.
Thugs on ofo bikes
Attackers allegedly riding ofo bikes threatened a young man with a knife on the guided busway path in Trumpington.
Now another person has been hurt on the guided busway path – and this time the attackers used a knife riding ofo bikes.
Jamie Marshall, who is 4ft 7in tall, was walking home from his for day at work at Marks and Spencer's in the Beehive centre on the path from Cambridge rail station to his home in Trumpington when three men riding ofo hire bikes cycled towards him.
The 21-year-old told the Cambridgeshire Live : "I had my head down and saw them about 20 metres away. The biggest one rode by and just booted me in the stomach. I went to defend myself and he pulled out a massive six inch long knife and went for me.
"It hit my head and left a cut. I ran for it all the way home. It was terrifying but my adrenalin kicked in and I was ready to defend myself.
"I have a small knife cut in my head where they attacked me."
Ofo chiefs said they will help with the investigation if the force asks.
A video appears to show vandals destroying one of ofo's bikes.
Three youngsters are seen standing by the ofo bike in Fallowfields, East Chesterton before the younger one runs off as a van drives past in a video.
The two older youths then start to throw the bike about and use a large rock in an attempt to smash it up – while appearing to be eating ice cream.
A spokesman for ofo said: "We are disappointed and saddened to see the bikes being vandalised, and we will be working with local police to identify the suspects.
"However, we're confident our presence in Cambridge is overwhelmingly welcomed, and due to our success in the city, we are in talks to introduce more ofo bikes to Cambridge.
"The number of bikes damaged through vandalism remains minimal – there has inevitably been a small amount of misuse of our bikes but we're pleased the majority of our fleet in Cambridge is being used in a responsible manner."
And a fleet of ofo cycles were being held at Cambridge police station with at least one pimped up by its rider.
A total of 15 of the bright yellow cycles were handed in at the station over October and November last year – and one was illegally painted a luminescent green.
Ofo has 450 bikes on the citys streets but many are abandoned and some are being handed in to the police station when the locks are broken or they have been found abandoned by the public.
Ofo has a team of dedicated marshals on the ground to deal with issues of vandalism and abondonment.
One vandal thought ofo bikes could swim and left their bike in a pond near Abbey Swimming Pool.
It irked one Abbey Ward resident, who said: "I'm a lorry driver and I see the bikes dumped around Cambridge all the time. It's just like the old green bikes.
"There has been one in Cherry Hinton by Fishers Lane for approximately four days just chucked on the floor.
"Something definitely needs to be done – it looks messy."
Tom Tree, 34, was left getting just two hours' sleep back in April as the misuse alarm fitted to the bikes was triggered.
The ofo bike was left beeping in the street outside his window all night.
Mr Tree was forced to close his window and struggle in the heat, saying: "What's the bloody point in an alarm going off if nobody is called to react to it? What's the purpose of it?"
Ofo apologised for the inconvenience caused, and a marshal fixed the issue the following day.