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roll-road

20"x4.0" Fat Tire Inner Tubes

Regular price
$49
Regular price
$45
Sale price
$49 Save $-4 (-9%)
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Bike Helmet Specs

  • Material: PC Shell + EPS Foam
  • Head Circumference: 57–62 cm (22.4–24.4 in)
  • Color: Black
  • Manufacturing Process: In-Mold Construction
  • Weight: 330 g

Bicycle Helmet Features

Bicycle Helmet Features

  • High-quality in-mold PC shell with high-density EPS foam for enhanced impact absorption
  • Extended, wide magnetic interchangeable lens with anti-glare coating and 3 viewing modes
  • Quick-release magnetic buckle for easy one-second wear and removal
  • 14 large ventilation ports for efficient airflow and cooling
  • Adjustable dial-fit system for personalized head circumference adjustment
  • Integrated rear LED light with 3 modes (steady/flash/SOS) for enhanced night visibility
  • Removable and washable interior padding for hygiene and comfort

Size: 32mm (Regular valve). 20" x 3.5/4.0 tire tubes, suitable for RollRoad electric bikes, Emma 3.0,  Shark 3.0, Emma 4.0, LEON.
High Quality: This tire tube is made of high - quality butyl rubber. It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, and electrical insulation.
Comfortable & Safe: After replacing the butyl rubber tube, it can cushion the impact from uneven road surfaces, making the ride more comfortable and safe.
Easy Installation: Installation is quick and easy. When inflating a completely flat tire, please follow the inflation guide. It saves time and effort, and you can replace the old tube in just a few minutes.

Installation Precautions: Please check the side of your tire to confirm the tire size used by your electric bike.
Important Note: When changing a bicycle inner tube, be sure to inflate it a little before installation. This gives the inner tube its shape and prevents it from getting twisted or wrinkled, which may cause a pinch flat. Check whether the tire beads on both sides are evenly seated on the rim.