A government scheme offering £50 bike repair vouchers will launch in England on Tuesday as part of plans to boost cycling and walking
An initial 50,000 vouchers will be made available online just before midnight on a first come, first served basis.
The prime minister also announced that bikes will be made available on the NHS as part of the strategy.
But Labour said many of the government's proposals were taking too long to come into effect.
It comes after the government launched its obesity strategy on Monday.
GPs in areas of England with poor health will be encouraged to prescribe cycling, and patients able to access bikes through their local surgery.
The government's "Fix Your Bike" vouchers are being released in batches "to help manage capacity" and so that the scheme can be monitored before being rolled out more widely, the government said.
They will typically cover the bill for a standard service and the replacement of a basic component such as an inner tube or cable.
