Fixed calipers always have pistons in pairs.

Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

The main idea is that a fixed caliper clamps the rotor from both sides. Because the caliper body is stationary, hydraulic pressure must push pistons on opposite sides of the rotor to produce clamping action. In most fixed calipers, there is at least one piston on each side, and in higher‑performance designs there are multiple pistons on each side arranged in pairs. This opposing, paired piston arrangement spreads the braking force evenly, improves pad wear, and provides stronger clamping without the caliper tilting. So fixed calipers inherently involve pistons arranged in pairs (or multiples that operate across the rotor), which is why this statement is true.