The bellows (or protective cap) is located at the back of the piston, where the thrust rod enters the body of the pump. Its role is often underestimated:

• Physical barrier: It prevents track dust, gum residues and moisture to enter the cylinder.

• Piston protection: Once the dust enters, it mixes with grease and creates an abrasive paste that shines the surface of the piston and the body of the pump.

• Sustainability: A bellows in good condition multiplies two the life of your internal cups.

In the 22SRR pump, this part ensures Dynamic tightness. Unlike a static O-ring (which does not move), it is subjected to a constant back and forth movement at each pressure on the pedal.

• Function: It prevents the brake fluid from reflving backwards the piston and holds the hydraulic pressure needed to operate your stirrups.

• Consequence of a failure: A pedal that becomes "soft", which sinks to the floor, or a leak of liquid that appears at the protective bellows (cap).

The Repair kit for brake caliper RR-FL01 (I32x2) is a set of sealing seals of origin manufacturer (Original Freeline / Birel Art). This targeted kit is specially designed to recondition the main hydraulic brake brake caliper who equips the majority of the group's adult competition chassis Birel Art (Rotax, X30, ok, kz).

As can be seen on the reference image 12820.jpgThis pack specifically includes essential elements to restore the internal hydraulic pressure of your caliper: 4 main sealing cups To house the 32 mm diameter pistons (double piston system per half-shell or 4-piston caliper), as well as the Fine Section O-ring ensuring the tightness of the passage of liquid between the two blocks of the caliper.

Fabricated in an ethylene-propylene rubber (EPDM) of competition quality, these factory joints support extreme liquid temperatures without expanding or disintegrating, guaranteeing a total sealing and a perfect return of the Pistons after each braking.