CHANGCHENG 2.75/3.00-19 (70/100-19) Inner Tube for GT73 Freego X2 Pro — 19" Butyl, Puncture-Resistant

CHANGCHENG's 2.75/3.00-19 (70/100-19) butyl inner tube is a direct-fit replacement designed to restore airtight performance and ride comfort for GT73 Freego X2 Pro 19-inch off-road ebikes.

This inner tube is purpose-made for the GT73 Freego X2 Pro ebike with a 19-inch rim, replacing worn or damaged tubes without modification. Built from durable butyl rubber and weighing about 520 g, it balances puncture resistance and pliability to keep your ride predictable on rough trails. The package contains one inner tube; tools and installation instructions are not included.

Will this tube fit my GT73 Freego X2 Pro ebike?

Yes—this inner tube is specified for 19-inch rims and the GT73 Freego X2 Pro model. Confirm your tire size reads 2.75/3.00-19 or 70/100-19 to ensure correct fitment. Using the correct diameter is essential for safe tire seating and reliable inflation.

• Compatible rim diameter: 19 inches
• Marked size: 2.75/3.00-19 (70/100-19)
• Intended model: GT73 Freego X2 Pro off-road ebike
• Sold as a single inner tube per package

How durable is the butyl rubber construction?

Made from high-quality butyl rubber, the tube resists air permeation better than many alternatives and offers solid puncture tolerance for off-road conditions. Butyl blends flexibility with toughness, helping the tube absorb impacts and maintain pressure between rides. Regular inspection and correct inflation still help maximize service life.

• Material: high-grade butyl rubber
• Low air permeability to hold pressure longer
• Improved shock absorption on uneven terrain
• Robust against common trail debris and pinch flats

What should I expect during installation and use?

Installation follows standard inner-tube replacement steps: remove the wheel, carefully unseat the tire bead, replace the tube, and re-inflate to the manufacturer's recommended pressure. No installation instructions are included, so have basic tools and a pump ready or seek a bike shop if unsure. After mounting, check for pinches, valve alignment, and proper seating before riding.

• Package includes: 1 inner tube only
• No printed installation guide included
• Recommended: basic tire levers and a pump or shop service
• Always check for leaks and correct pressure before use

Who is this for?

This inner tube is made for GT73 Freego X2 Pro owners and mechanics who need a direct replacement for 19-inch off-road ebike tires. It's suited to riders who value reliable air retention and impact damping on trails—whether you're maintaining a personal ebike or stocking parts for repairs. If your current tube is leaking, damaged, or aged, this butyl inner tube provides a straightforward, OEM-compatible solution to get your GT73 back on the trail quickly.