Bike Pedal Thread Insert - Left Side, 9/16"x20 Inner, 5/8"x24 Outer

Bicycle right pedal thread inserts are essential components for maintaining the integrity of your bike's pedal threading. These inserts are designed to fit snugly into the crank arm's pedal hole, providing a fresh and sturdy threading surface for your pedals to securely attach to. Whether you're replacing worn-out inserts or prepping a new crank arm, these thread inserts ensure a solid connection between your pedals and the crank, enhancing pedaling efficiency and preventing potential pedal loosening or detachment. With the right pedal thread inserts, you can keep your bicycle in top condition and enjoy smooth, worry-free rides for miles to come.

• [IMPORTANT: REQUIRES 5/8"-24 LEFT-HAND TAP] – This is a professional repair insert, NOT a drop-in replacement. To install it on a stripped LEFT crank arm, you MUST first ream and tap the damaged hole using a 5/8"-24 LEFT-HAND tap tool (such as Unior 1695.1AL) to cut reverse threads. Do not purchase if you do not have or plan to buy the specific left-hand tap tool.
• [LEFT SIDE ONLY - REVERSE THREAD SPEC] – Features a 9/16" x 20 TPI LEFT-HAND Inner Thread (fits standard bicycle left pedal spindles) and a 5/8" x 24 TPI LEFT-HAND Outer Thread. This wound wire insert is engineered exclusively for the LEFT side (Non-Drive Side) crank arm. Note: Will not fit the right/drive side.
• [ULTRA-TIGHT FIT FOR ZERO LOOSENING] – Designed with high-precision, tight-tolerance threads to ensure the insert permanently locks into the crank arm and never backs out under heavy reverse pedaling forces. Because the inner reverse threads are intentionally tight, we strongly recommend pre-threading the insert onto your left pedal spindle or a 9/16"-20 left tap before final installation to ease it in.
• [PRO INSTALLATION TIP FOR LEFT-HAND THREADS] – Remember: Turn COUNTER-CLOCKWISE to tighten this left-hand insert. 1. Thoroughly clean the newly tapped 5/8" hole. 2. Thread the insert onto your left pedal spindle first to gain proper leverage. 3. Work it slowly into the crank arm, backing out occasionally. 4. Apply Red Threadlocker on outer threads to ensure a rock-solid, permanent bond.
• [PREMIUM CRANKSET REAR ARM RECOVERY] – A dependable, cost-effective alternative to replacing premium, expensive Shimano, SRAM, or FSA left crank arms. Once properly seated and cured with threadlocker, this heavy-duty sleeve fully restores the original structural integrity, proven to withstand high-torque riding and extreme sub-zero weather.