Prepping your bike for sale: the 8 jobs that add £200

A bike presented dirty and out of adjustment sells for 15 to 25% below its value on average, and takes two to three times longer to shift. This is not about looks: a buyer who cannot judge the mechanical condition assumes the worst and negotiates accordingly.

Here are eight jobs, ranked by cost-to-benefit ratio, that put a machine back in a sellable position. The total budget runs from £45 to £130 in parts and consumables, for a typical effect of £130 to £260 on the final price depending on the category of bike.

1. Degrease and re-lubricate the drivetrain

This is the single most profitable job, by a distance. A drivetrain black with old grease signals absent maintenance, whatever the real condition of everything else.

• Degreaser, chain brush, fine brush for the cassette and jockey wheels.
• Rinse, dry thoroughly, then lubricate with dry or wet lube according to use.
• Clean the chainrings and the inside of the mech cage.

Cost: £10 to £18. Time: 45 minutes. It is also the moment to measure chain wear.

2. Check the chain and replace it if needed

A chain worn beyond 0.75% (0.5% on 11 and 12-speed drivetrains) should be replaced. Two reasons:

• The informed buyer produces a chain checker or a vernier. A shot chain hands them a numerical negotiating argument, usually inflated: they will ask for £130 off for a £30 part.
• An over-worn chain damages the cassette. If the cassette is already going, the job gets heavier (£70 to £180 depending on the groupset) and you then have a decision: replace it, or declare it honestly and adjust the price.

Cost: £15 to £40 for the chain alone.

3. Set up the gears

Crisp shifting, with no hesitation and no noise, is the first thing a buyer tests on the ride. A poorly indexed mech is enough to plant doubt about the whole bike.

• Check the mech hanger is straight, the high and low limit screws, and cable tension.
• Replace a split outer or a frayed inner: £10 to £22 for a full set.
• On electronic drivetrains, check the battery level and update the firmware before showing the bike.

4. Brakes: pads, blocks, bleeding

Spongy brakes or rubbing rotors are a deal-breaker on the test ride.

• Disc pads: replace below 1 mm of friction material. £15 to £35 a pair.
• Rim brake blocks: £10 to £18.
• Warped rotors, or rotors below the minimum thickness (engraved on the rotor): £18 to £45 each.
• A bleed if lever travel is excessive: £20 to £35 at a shop, or DIY with a kit.

A bike that stops properly wins the buyer's confidence in the first few metres.

5. Tyres and pressure

Cracked tyres or tyres at the wear indicators immediately cost £50 to £100 in negotiation, when a pair often costs less than that.

• Replace if the sidewalls are cracked, if the tread has squared off, or if there are visible cuts.
• On tubeless setups, refresh the sealant before selling and mention it in the listing: it signals recent maintenance.
• Inflate to the right pressure before every viewing. A bike that rides badly because the tyres are half flat creates a bad impression for no reason.

6. Torque, play and creaks

An hour of checking that costs nothing.

• Headset: hold the front brake and rock the bike back and forth — there should be no knocking.
• Wheel bearings: spin the wheel, listen, check for lateral play.
• Bottom bracket: cranks with no lateral play, smooth rotation.
• Wheels running true: a visible buckle puts a buyer off instantly.
• Correct torque on every component, particularly on carbon parts.

A silent bike sells. A bike that creaks with every pedal stroke triggers a suspicion that no amount of talking will undo.

7. Put the paperwork together

This is the most neglected step, and one of the most profitable, especially now that buyers are wary of stolen kit.

To gather:

• Original purchase receipt, or failing that the order confirmation.
• Receipts for services and replaced parts.
• Serial number photographed, and the bike's registration status on BikeRegister or a similar database if applicable.
• Manuals, original torque tool, spare mech hanger, extra thru-axles.
• For an e-bike: the battery's charge cycle count if the display gives it, or at least the year the battery was bought.

A complete file is easily worth £90 to £130 on a mid-range bike, and unlocks sales that would not otherwise have happened.

8. Reshoot the photos after prepping

All this preparation is wasted if the photos predate it.

• Daylight, outdoors, plain uncluttered background.
• Bike clean, chain on the big ring, front wheel turned slightly.
• A set of 8 to 12 shots: both sides, drivetrain, cockpit, brakes, serial number, and close-ups of the flaws.

Photographing the flaws is not a concession: it is what stops renegotiation at handover.

Judgement calls: when not to spend

Not every repair pays. On a bike worth around £250 to resell, a £100 cassette will not come back. In that case, state the condition clearly, set a consistent price, and let the buyer do the work themselves.

The simple rule: a repair is worth doing if it costs less than half what it adds to the sale price. To make that call you need to know the starting value — a free two-minute valuation at /cote-velo gives that range and lets you work out whether the spend is justified.

In summary

• Drivetrain degreased and re-lubricated: the most profitable job, £10 to £18 and 45 minutes.
• Worn chains, pads and tyres hand the buyer negotiating arguments worth far more than the parts cost.
• A silent, well-adjusted, correctly inflated bike passes the test ride in thirty seconds.
• The complete file (receipts, serial number, registration) is worth £90 to £130 on a mid-range bike.
• A repair only pays if it costs less than half what it returns.