Bicycles and drivetrains
The one thing in this catalogue where cleaning it wrong is a mechanical risk rather than a cosmetic one.
What this area turns on
The trade documentation prescribes a posture, which is unusual enough to be worth reading twice: lean the wheel so the cogs face the ground, to minimise solvent dripping into the bearing. That is the whole problem in one instruction — the solvent that cleans the chain destroys the grease in the hub it sits above. The second instruction is the one people skip: the chain MUST be re-lubricated afterwards, dried on a rag first, one drop per link. A degreased chain left unlubricated wears the chainrings and the cassette with it.
Assessed and found wanting
Widely repeated techniques in this area that the evidence does not support, or supports only in part.
Washing-up liquid on a bicycle
Does not workWidely warned against in cycling forums, and the trade's own repair documentation specifies it: a quality dish washing soap is acceptable.
The records
Bicycle
Thing to cleanThe one object in this catalogue where cleaning it wrong is a mechanical risk rather than a cosmetic one — because the solvent that cleans the chain destroys the bearings.
Bicycle chain
ComponentThe dirtiest component on the machine and the one that must be lubricated immediately after it is cleaned. Cleaning it and stopping there causes wear.
Bicycle cassette
ComponentNarrow gaps that trap grass, grit and old lubricant, sitting directly on top of a sealed bearing that solvent must not reach.
Bicycle frame
ComponentPainted or lacquered tubing where the damage comes from grit under a cloth rather than from anything in the bucket.
Bicycle degreaser
Cleaning agentA solvent aimed at a drivetrain, and the reason it needs its own record is where it must not go: bearings, and the lubrication it strips by design.
Bicycle chain grease
Stain or problemA tacky lubricant loaded with road grit and metal, transferred as a sharply defined mark. The grit is what makes it more than a grease stain.
Chain cleaning tool
EquipmentA clip-on bath of brushes that lets a chain be cleaned in place. Its real advantage is keeping the solvent where the solvent should be.
Detail brush
EquipmentReaches the places that actually hold the dirt, which are never the places a flat cloth can press against.
Two-stage degreasing
MethodA solvent pass followed by a detergent pass. Each finishes what the other cannot, and the trade documentation says so in one sentence.
Re-lubrication
MethodThe step after degreasing, and it is not optional. Cleaning a mechanism removes the lubricant deliberately, and stopping there is worse than not cleaning it.
Washing-up liquid on a bicycle
Claim or techniqueWidely warned against in cycling forums, and the trade's own repair documentation specifies it: a quality dish washing soap is acceptable.