The LOOK 1 mm Q-Factor adjustment rings (reference 00029080) are precision spacers engineered to fine-tune your pedal stance width. Installed between the pedal axle and the crank arm, they increase the Q-Factor by 1 mm per side (+2 mm overall) to optimize hip-knee-ankle alignment. Perfect for solving biomechanical discomfort, preventing heel rub against crank arms, or applying custom bike fitting recommendations. Precision-machined from high-strength steel, these spacers ensure maximum torque retention and prevent thread damage under heavy loads.