Anti-Knockback Springs

anti knockback springsA range of anti-knockback springs are available for use with 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 two strengths indicated in lbs, with two sizes for each spring strength dependant upon piston diameter. Refer to the table below for part number details.

 

       

Spring Strength

Piston Diameter

 

Up To Ø34.93mm (1.375")

Above Ø34.93mm (1.375")

4lb

CP2632-113 CP2667-105
7lb CP4100-121 CP2667-113
9lb CP3432-134 CP2667-125
 12lb CP2632-129 CP2667-154 
Note: Springs are available in kits for 4, 7 or 9LB only.

   
Anti Knock Back Spring Kits
Part Number
Description and Contents

CP6518-4LBLL

Spring kit with 4 x CP2667-105

CP6518-4LBSS

Spring kit with 4 x CP2632-113

CP6518-4LBSSL

Spring kit with 4 x CP2632-113 & 2 CP2667-105

CP6518-4LBSSSS

Spring kit with 8 x CP2632-113

CP6518-7LBLL

Spring kit with 4 x CP2667-113

CP6518-7LBSSL

Spring kit with 4 x CP4100-121 & CP2667-113

CP6518-7LBSSSS

Spring kit with 8 x CP4100-121

CP6518-9LBLL

Spring kit with 4 x CP2667-125

CP6518-9LBSSL

Spring kit with 4 x CP3432-134 & 2 x CP2667-125 



 Download -  Anti-knockback spring customer drawing