Anti-Knockback Springs

CP6518

£2.18

* Select Number of Pistons

* Select Piston Diameter Range

* Select Spring Load

Overview

Anti-knockback Springs

A range of anti-knockback springs are available for AP Racing calipers. The spring is located behind the piston in the caliper bore and is designed to counteract pad knock off. The springs are available in four loads indicated in lbs/f (force) with 2 sizes dependent upon piston diameter.

Piston sizes up to Ø34mm

Spring Load	Part number	Free Length & Wire Ø (mm)
4 lbs	CP2632-113	38.43 & 0.91
7 lbs	CP4100-121	39.88 & 1.02
9 lbs	CP3432-134	49.02 & 1.02
12 lbs	CP2632-129	58.50 & 1.29

Piston sizes larger than Ø34.9mm

Spring Load	Part number	Free Length & Wire Ø (mm)
4 lbs	CP2667-105	39.88 & 1.22
7 lbs	CP2667-113	39.88 & 1.29
9 lbs	CP2667-125	70.36 & 1.29
12 lbs	CP2667-154	70.36 & 1.49

Anti-knockback Spring Kits

Caliper Type	Part number	Contents
4 Piston	CP6518-4LBSS	4x CP2632-113
	CP6518-4LBLL	4x CP2667-105
	CP6518-7LBLL	4x CP2667-113
	CP6518-9LBLL	4x CP2667-125
6 Piston	CP6518-4LBSSL	4x CP2632-113 & 2x CP2667-105
	CP6518-7LBSSL	4x CP4100-121 & 2x CP2667-113
	CP6518-9LBSSL	4x CP3432-134 & 2x CP2667-125