Buying a used bike is the smartest way to land a premium ride without the new bike premium. It’s better for your wallet and better for the planet. But if you’re buying privately, the responsibility of the safety check falls entirely on you.
In our latest video, Luke talks you through exactly what we look for before a bike earns a spot on our site. Whether you’re buying from a friend or a stranger on the internet, here is our guide for a safe used purchase.
1. The Frame: Beyond the Scratches
At Cycle Exchange, we don't mind a cosmetic scuff, but we never compromise on structural integrity. When you're inspecting a bike:
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The Carbon Scan: Run your hands over the tubes. You’re looking for soft spots or "delamination." Pay close attention to the areas around the seatpost clamp and front derailleur, over-tightening bolts here is a common way to crack a frame.
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The Metal Check: On aluminum or steel, look for ripples in the paint or dents. A dent in a thin-walled tube isn't just a bruise; it’s a weak point.
2. The Drivetrain: The 50% Rule
A drivetrain that looks "okay" can still be a hidden expense.
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The Shark Tooth Test: Look at the teeth on the cassette and chainrings. If they are pointed and sharp rather than flat-topped, they are worn out.
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Chain Stretch: If you don't have a chain checker tool, try to pull the chain away from the front chainring. If it lifts enough to see daylight through the teeth, that chain (and likely the cassette) is toast. At CE, if a component has more than 50% wear, it’s replaced immediately.
3. The Hidden "Spinners": Bearings
A bike can look brand new but feel like a tractor if the bearings are gone.
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The Headset: Hold the front brake and rock the bike. If you feel a "knock," the headset is loose. Turn the bars slowly; it should feel like silk. If it feels "notchy" (like it wants to stay in the center), the bearings are pitted.
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The Bottom Bracket: Grab a crank arm and try to wiggle it toward the frame. Any play here means a replacement is needed.
4. Safety Non-Negotiables: Brakes & Wheels
If the brakes don't work, nothing else matters.
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Hydraulics: The lever should feel firm. If it’s "squishy" or pulls to the handlebar, you’re looking at a bleed service.
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The Rims: For rim brakes, look for a concave (hollowed out) braking surface. That means the metal is thin and the wheel is reaching its end of life.
5. The Test Ride
Never buy a bike without a ride. Listen for creaks (usually bottom brackets or headsets) and ensure the shifting is crisp. If the bike feels "noodle-like" or unstable under power, walk away.
The Cycle Exchange Shortcut
The reality? Most private sales come with a "sold as seen" risk. That’s why we do things differently. Every bike we sell goes through this systematic refurbishment, includes a 12-month warranty, and has every single cosmetic mark documented.
