2025-06-05

Replacing the Tire Tube

Tools and Equipment

  • 5 mm Hex bit
  • T25 Torx bit
  • Pliers
  • 1/2” Socket
  • 1/2” Wrench
  • Torque wrench (capable of 2.5 Nm and 10 Nm torques)
  • Tire pressure gauge
  • Air compressor or bicycle tire pump with attachment for a Schrader valve
  • Tire tube

  1. Use a 5 mm hex key to remove the 2 x brake caliper screws securing the tire to the dolly.
  2. Remove the cotter pin so the wheel is free to be removed from the axle. Remove the tire.
  3. Use a T25 Torx bit to remove the 6 x screws securing the brake disc and remove the brake rotor.
  4. Remove the valve stem cap and press the center of the valve to ensure that the tire is completely deflated.
  5. Use a 1/2" wrench and 1/2" socket to remove the 4 x bolts securing the brake disc hub to the wheel.
  6. Remove the brake disc hub and the 2 x gray wheel rims.
  7. Remove the tire tube from inside the tire.
  8. Install the new tube inside the tire. Ensure that the tube is evenly distributed inside the tire and is not compressed anywhere.
  9. Install the outer half of the rim. Align the valve stem with the cutout in the rim.
  10. Install the inner half of the rim, aligning the holes in the two halves.
  11. Re-install the brake disc hub. Tighten the 4 x bolts to 10 Nm in the order shown below.
  12. Re-install the brake rotor. Tighten the 6 x screws to 2.5 Nm in the order shown below.
  13. Fill the tire pressure to the target of 45 psi (3.1 bar). Replace the valve stem cap.
  14. Re-install the wheel on the axle. Insert the cotter pin and deform it to secure the wheel in place.
  15. Re-install the brake caliper and torque the 2 x screws to 10 Nm.