Users register online or over the phone.
Casual users pay an initial £10, which credits them for their first rides. Those with a smartphone can rent and return bikes using a special app. They pay £1 per half hour, capped at £10 for up to 24 hours.
Annual members pay £60 and are issued with a radio frequency identification card that can be swiped over the cycle's on-board computer to speed up the hire process.
They enjoy free hire for the first 30 minutes and pay £1 an hour after that, capped at £5 for up to 24 hours.
The sturdy bikes are built for reliability and comfort rather than speed. They have a combination lock, a basket on the handlebars, lights, three gears, a kickstand and a saddle with a quick-release height adjuster.
They also have GPS system to confirm when bikes have been returned - or find them if they go missing.