That's your USP, right there.
By all means sell chains, tubes, tyres, spokes and so on- stuff people need right away.
But keep your stock focused on service items.
@Dammit started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
That's your USP, right there.
By all means sell chains, tubes, tyres, spokes and so on- stuff people need right away.
But keep your stock focused on service items.