Maxxis Tube 3.25/3.50-19 TR4 (XCS)

Maxxis Tube 3.25/3.50-19 TR4 (XCS) is a purpose-built inner tube designed to pair with 19-inch wheels and 3.25/3.50 inch wide tires. Built for riders who demand reliability on both gnarly trails and everyday rides, this tube stays inflated under vibration, helps prevent pinch flats, and keeps your tire performance consistent mile after mile.

• 
  Precise fit for 19-inch rims — designed to match 3.25/3.50-19 tire sizing for secure seating and consistent pressure retention.
• 
  TR4 valve stem — a robust, durable stem that resists leaks and maintains a reliable seal even on rough terrain.
• 
  Rugged XCS construction — built for off-road ready durability while remaining suitable for street and light-trail use, helping you tackle uneven surfaces with confidence.
• 
  Pinch-flat resistance — engineered to reduce pinch flats during aggressive cornering and low-pressure riding common on dirt roads and trails.
• 
  Easy installation and maintenance — standard tube design that installers recognize, with straightforward patching options should a puncture occur after removal.

Why this tube stands out

If you ride a dirt-capable 19-inch bike, the Maxxis TR4 (XCS) tube delivers dependable inflation, predictable handling, and a measure of resilience that translates into fewer roadside surprises. The combination of a compatible size, a durable valve, and rugged construction means you can focus on riding—whether you're carving singletrack, cruising gravel, or cruising back home after a long day in the saddle.

Ideal use cases

• Dual-sport and enduro bikes with 19-inch wheels
• Trail-equipped motorcycles that frequently tackle rough terrain and variable surface conditions
• Riders who want a reliable spare tube for backcountry trips or daily commutes on mixed roads

Pro tips for installation and care

Before installation, inspect both the tube and tire for embedded debris or wear. Ensure the rim tape is intact to protect the tube from sharp edges. Inflate to the recommended pressure only after the tube is seated evenly inside the tire, and avoid overinflation to maintain tube integrity. If you puncture, patch according to manufacturers’ guidance or replace the tube to preserve tire performance and safety on your next ride.