The Kool-Stop Tire Bead Jack (Model KS-TJ) is a highly effective, articulated workshop tool engineered explicitly for installing notoriously tight bicycle tires. Made in the USA, this tool employs a unique physical lever action to lift stubborn tire beads up and over the rim edge without pinching the inner tube or scratching premium wheel finishes.

Mechanical Design & How It Works

Key Features:

• Fulcrum Action:
  Unlike flat plastic tire levers that you pry under the tire, this tool features a dual-arm, hinged design. A smooth, padded cradle rests securely against the outer rim edge to act as a solid pivot point.
• Bead Pull Hook:
  The articulated swing-arm features a targeted hook that clamps directly onto the unseated tire bead.
• Leverage Advantage:
  Pulling the ergonomic handle utilizes mechanical leverage to easily hoist the tightest wire or folding beads into the center channel. Because the tool never sneaks under the rim hook, the risk of flatting a tube during a tight installation drops to zero.
• Capacity:
  Safely manages heavy-duty tire widths measuring up to 2.4 inches wide.

This thoughtfully designed tool ensures a smooth and damage-free tire installation process, making it an essential addition to any cyclist's workshop.