Used BMX Bikes: Buyer's Guide UK

The Used BMX Market

BMX is one of the few cycling categories where buying used makes more sense than buying new for most riders. Frames and components are designed to take abuse, bikes are simpler than almost any other type, and the scene has always leaned towards swap meets and parts trades rather than shiny shop floors. If you know what to look for, you can buy a genuinely good BMX for a fraction of new retail.

The used market splits into three rough segments. Kids bikes sold on as children grow out, which is the biggest volume. Freestyle and street bikes rotated through by riders who upgrade, which is where most enthusiast buyers shop. And collector and vintage bikes, which is a world of its own with prices that do not follow normal bike logic.

Most of this guide focuses on the middle segment, because that is where most buyers actually land. The checks and prices below cover a first proper BMX, a teenager's replacement bike, and returning riders who rode the discipline in the 1990s.

Types of BMX Bikes

Freestyle

The default modern BMX. Built for skateparks, street riding, flatland tricks and dirt jumps. Stronger frames, pegs often fitted, gyro brake detangler on some setups, wheels built for impact rather than speed. Single speed, no suspension.

What to look for: 20 inch wheels (standard adult size), a 20 inch to 21 inch top tube depending on rider height, 3 piece cranks, sealed bearings throughout, four pegs or pre drilled peg mounts.

Race

Built for BMX race tracks. Lighter frames, narrower tyres, longer top tubes, proper derailleur sometimes (rare on BMX) or single speed with race specific gearing. Race BMX is a smaller segment and rarely crosses over with freestyle.

Dirt Jump

Sits between BMX and mountain bikes. Larger 24 inch or 26 inch wheels, sometimes with front suspension, designed for proper dirt jumps and bike parks with a focus on airtime rather than tricks. Some people still call these BMX bikes, most shops call them dirt jumpers.

Old School and Collector

Bikes from the 1980s and early 1990s with original paint and components, sometimes restored, often worth far more than anything modern. Haro Freestyler, GT Pro Performer, Redline MX, Kuwahara ET. A nice 1985 Haro Master can sell for £800 to £2,000 depending on originality. This is a collector market rather than a riding market.

Sizing

BMX sizing is simpler than any other bike type. Wheel size stays constant at 20 inch for adult freestyle. What changes is the top tube length. Pick the top tube that matches rider height:

• Rider height under 150cm: 19.5 inch to 20 inch top tube. Usually sold as Mini or Junior.
• 150cm to 170cm: 20 inch to 20.5 inch top tube. Standard freestyle.
• 170cm to 183cm: 20.5 inch to 21 inch top tube. Most adult riders end up here.
• Over 183cm: 21 inch to 21.5 inch top tube. Taller rider specific.

Manufacturers label these as Junior, Expert, Expert XL and Pro. Trust the top tube number, not the label.

What to Check Before Buying

BMX bikes live hard lives. Go through this list on every used bike:

1. Frame cracks and dents. BMX frames take impact. Look carefully at the head tube weld, top tube middle, seat tube area and drop outs. Hairline cracks propagate fast. A dented top tube is cosmetic. A cracked weld is a binned frame.
2. Fork condition. Tap the fork legs lightly with a coin. Dull thuds where you expect a clean ring suggests metal fatigue. Check the fork ends where they meet the wheel dropouts for bending or crack lines.
3. Wheels. Spin each wheel. Watch for wobble and check spoke tension by squeezing pairs. BMX wheels get abused. A truing is £15 to £25. A rebuild is £50 to £90 plus parts.
4. Hubs. Spin the wheel and listen. Grinding or roughness means hub service or replacement. Cheap cassette hubs on entry BMX bikes often blow out under abuse. Better hubs from Odyssey, Profile or Shadow Conspiracy are worth paying more for.
5. Bottom bracket and cranks. Pedal backwards slowly. Any clicking, grinding or rocking means bottom bracket service (£20 to £40) or replacement. Check cranks for play at the spindle.
6. Sprocket and chain. BMX sprockets wear in a distinctive shark tooth pattern. A new sprocket is £15 to £40. A chain is £8 to £20. Replace both together if worn.
7. Brakes (if fitted). Many street and park BMX bikes run no brakes at all. If the bike has brakes, check the pads, lever feel, and gyro detangler (if fitted) for smooth rotation.
8. Pegs. If the bike has pegs, spin them, check for cracks at the base, and verify they thread properly onto the axles. A full set of replacement pegs is £20 to £50.
9. Headset. Rock the bike forward and back while holding the front brake. Clunking means a headset service or replacement (£15 to £30).
10. Frame number check. BMX bikes get stolen regularly, especially from skate parks. Run the frame number through a UK stolen-bike database before you pay.

What You Should Pay

BMX pricing depends heavily on spec level and brand. Use these as rough ranges for bikes in good working order:

• Under £80: Older kids bikes, entry level from brands you have never heard of, bikes needing work. Fine for getting started if the frame is sound.
• £80 to £180: Decent entry level freestyle bikes from Mongoose, Diamondback, Haro at basic spec level. Two or three years old. Good first proper BMX.
• £180 to £300: Mid range freestyle bikes from WeThePeople, Cult, Kink, Fit, Eastern at entry level. Sealed bearings throughout, better quality cranks, stronger rims. The sensible bracket for serious beginners and returning riders.
• £300 to £500: Proper enthusiast bikes. Complete builds from the top freestyle brands at higher spec level, or custom builds on respected frames. This is where most experienced street and park riders shop.
• £500 to £900: High end complete bikes and custom builds with premium components. 3 piece cranks, proper wheels, 4130 Chromoly throughout.
• Over £900: Top tier custom builds, signature pro bikes, collector models. Enthusiast territory.

Old school and collector BMX follows its own rules. A genuine 1984 Mongoose Californian can sell for £600 to £1,800 depending on condition. A restored 1989 Haro Master goes £700 plus. Do not apply modern BMX pricing logic to vintage bikes, and check completed sales before you commit.

Where to Buy Used

Cyclesite lists used BMX bikes with frame number checks and escrow protection. Filter by BMX and check the seller's condition report before paying.

Vintage BMX Society forums and specific BMX collector groups are the right place for old school collector bikes. Pricing is tight, knowledge is deep, and you will not find the same bikes on general second hand sites.

Skatepark word of mouth still works for local trades and cash sales if you ride regularly. The downside is obvious: no protection if something goes wrong.

Avoid: Unbranded bikes with specifications you cannot verify, listings with no frame numbers, anyone who will not meet in person or who pressures you into bank transfers without collection.