Park Tool BMT-1 Tire Bead Breaker — Tubeless & Tight-Bead Removal, Non-Marring Jaws

The Park Tool BMT-1 Tire Bead Breaker quickly and safely unseats stubborn bicycle tire beads—especially tight tubeless setups—without damaging rim or tire.

If you’ve wrestled with a stubborn tire that won’t unseat, the BMT-1 was designed to save time and strain. This hand tool uses a clamping jaw and a long leverage handle to pull the bead inward to the rim’s center channel, creating the space needed to lift the bead off the seat. With protective jaw covers and a large adjustment knob, it works on a wide range of wheel and tire combinations while minimizing the risk of rim or tire damage.

How does the BMT-1 make removing tight tubeless beads easier?

The BMT-1 locks onto the tire sidewall and uses lateral leverage to slide the bead toward the rim’s center, creating a releasable gap. This targeted inward pull is much more effective on modern tubeless designs than prying with levers alone.

• Wide locking jaws grip the tire body for consistent pressure
• Long handle provides mechanical advantage to reduce effort
• Works across many rim and tire widths, including tight-fitting tubeless systems

Will the tool damage rims or tire beads?

The BMT-1 includes non-marring jaw covers and a controlled clamping action to limit contact stress. Proper placement and gradual tightening keep pressure distributed, reducing the chance of scratches or pinches.

• Non-marring covers protect rim finish and tire sidewall
• Large adjustment knob allows precise clamping pressure
• Grip design prevents slipping that can scuff or gouge surfaces

How do I use the BMT-1 on my wheel—step-by-step?

Position the jaws on the tire sidewall, tighten the knob until they firmly squeeze the tire, then pull the handle laterally to draw the bead toward the center channel. Once the bead clears the seat, you can finish removal with a tire lever or by hand.

• Place jaws over the tire sidewall, not the rim edge
• Tighten the adjustment knob to secure the tire body
• Pull the handle sideways to move the bead toward the rim center
• Remove tire with a lever once the bead is released

What sizes and tire types will the BMT-1 handle?

The BMT-1 is built to work with most bicycle wheel sizes and a broad range of tire profiles, including high-volume mountain tires and narrow road tubeless setups. Its wide jaw opening and strong handle make it adaptable for many combinations, though extremely unusual rims may need alternate methods.

• Compatible with common MTB, gravel, and road tubeless tires
• Adjustable jaw range for different tire widths and sidewall shapes
• Durable construction for repeated workshop use

Who this is for: The Park Tool BMT-1 is ideal for home mechanics, bike shop technicians, and riders who maintain tubeless setups or frequently change tires. If you value faster, less frustrating tire removal and want to protect your rims and beads during the process, this tool reduces effort while increasing control.