How to Fix BMX Bikes

Written by robin reichert
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If you own a BMX bike, you will want to know a few fix-it tips to keep the bike in outstanding condition. Regular maintenance and quick repair will ensure the longevity of the BMX bike. Headset and bearings repair, brake repair, seating adjustments, chain adjustments, handlebar repositioning and loose pedal repair are all common repairs performed on BMX bikes.

Skill level:
Moderate

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Things you need

  • 2 Allen wrenches
  • 2 Fly brakes
  • 1 Cable hanger
  • 1 Linear Slac cable
  • Wrench
  • Cable clippers
  • Grease

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Instructions

  1. 1

    Use two Allen wrenches to loosen the pinch bolt and vertical bolt attaching the handle bars to the stem to repair lose bearings; push down on the handle bar and re-tighten the pinch bolt and vertical bolt. Test the handle bars for play. Ride the bike to check for ride continuity.

  2. 2

    Grease the brakes before starting brake repairs. Apply the bottom arm brake first: slide the arm over the brake curve, use the included bolt to attach the arm and tighten the brake. Insert the brake cable into the lever in the handle bars; stretch the cable to the back brake and cut with clippers. Insert the cable into the brake handle; attach cable to rear brake and tighten with the Allen wrench. Repeat for front arm and brakes.

  3. 3

    Loosen the seat clamp bolt to adjust the seat saddle. Pull up on the seat saddle to reposition the seat post. Re-tighten the seat clamp bolt; test the seating for comfort. Make sure your knees bend slightly when reaching the pedals.

  4. 4

    Repair a loose chain tension; loosen the rear axle bolts and slide the back wheel forward and back to ensure wheel alignment. When the chain gains proper tension, re-tighten the axle bolts. Grease the chain if required.

  5. 5

    Reposition the handle bars by loosening the pinch bolt with an Allen wrench; adjust the stem according to preference and re-tighten the pinch bolt.

  6. 6

    Tighten the crank arm by turning the bolt located in the centre of the sprocket. Tighten the pedal bolt that attaches to the crank arm. Repeat the process on the opposite side of the bike.

Tips and warnings

  • Noises such as rattling and creaking are indicative of unnecessary friction and wear and tear. Identify the location of the sound; use grease on any parts requiring lubrication to eliminate noise issues.

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