Buy smart, secondhand

The used mountain bike buying guide

By Ryan - lifelong rider · Updated 2026-07-16

The used market is where the best deals in mountain biking live - and where the most expensive mistakes happen. This is the checklist I actually use when I look at a used bike, plus where to shop and when to walk away. Twenty minutes of inspection can save you a thousand dollars.

Before you even go look

• Know the new price. Look the model up in our bike database - 587 current builds with real prices. That number anchors every negotiation.
• Ask for the serial number and check it against stolen-bike registries (Bike Index, Project 529). A seller who refuses is telling you something.
• Ask three questions by message: When was the suspension last serviced? Any crashes? Original receipt? Vague answers to all three means skip the trip.

The inspection checklist

1. Frame - the dealbreaker

Everything else is replaceable; the frame is the bike. Run a finger along the welds and look for cracks, dents, or paint bubbling at the head tube, bottom bracket shell, chainstays, and seatstays. On carbon, tap suspicious spots - solid carbon clicks, damaged carbon thuds. Deep gouges through the paint into carbon fiber: walk away. Check the derailleur hanger is straight and the frame has no creaks under load.

2. Suspension - the money pit

A fork rebuild runs $150-$250, a shock service $100-$200, and neglect kills both. Look for oil residue or scratches on the stanchions (the smooth upper tubes), push the fork and shock through their travel - they should move smoothly and return without slurping or knocking. Cycle the bike hard on a parking-lot curb and listen. Ask for service records; “I never needed to service it” on a three-year-old bike means it’s overdue.

3. Drivetrain - the hidden $400

Bring a $12 chain checker. A worn chain (past 0.75%) has likely worn the cassette and chainrings too - that’s $250-$450 on a 12-speed bike. Check chainring teeth for shark-fin shapes, run through every gear on a test ride, and inspect pulley wheels for play.

4. Wheels, bearings, brakes

• Spin both wheels: watch for wobble, listen for grinding hubs. Grab the rim and push side-to-side - play means bearings.
• Check rims for dents and flat spots (especially rear, especially on enduro bikes).
• Rock the crankarms and headset for play; a notchy headset is cheap, a seized BB less so.
• Squeeze the brakes hard: firm lever, no fade to the bar. Look at pad thickness and rotor wear grooves.

5. The test ride

Never buy without one. Shift every gear under load, brake hard from speed, stand and sprint (listen for creaks), and hop the front wheel. Five minutes of riding reveals what an hour of looking won’t.

Where to shop

• Pinkbike BuySell - the most serious used-MTB marketplace. Riders selling to riders, good descriptions, fair prices. Shipping is normal here; insist on detailed photos and video.
• Facebook Marketplace & Craigslist - the local option, best for in-person inspection and cash negotiation. More junk to filter, better deals when you find them.
• Certified pre-owned / consignment (e.g. buycycle, local consignment shops) - you pay a premium for inspection and a return window. Worth it for first-time used buyers.
• Local shop trade-ins - some shops sell serviced trade-ins with a short warranty. The safest used buy there is.

Pricing: the honest formula

Start from the current new price. Subtract 30-40% for year one, then 10-15% per additional year. Then subtract every needed repair you found: suspension service ($200-$400 if unknown history), drivetrain wear ($250-$450 if the chain checker fails), tires ($120 if worn). What’s left is a fair offer - and having the checklist findings makes the negotiation for you.

Walk away when…

• Any frame crack, carbon damage, or repaired frame - no deal is good enough.
• No serial number, no receipt, price way under market, seller in a hurry. That’s a stolen bike.
• Seized suspension, wrong-size bike (“you’ll grow into it” - you won’t), or a heavily-parked bike being sold as “barely ridden” with worn grips, torn saddle, and bald tires.

Specs and prices are a snapshot compiled from brand-published information - always confirm current details on the brand’s site. Some links earn us a commission at no cost to you; it never affects our picks. No brand pays to be featured.