This caliper is essentially a hybrid of RO and T1 caliper technology. The CR3 has oval caliper pistons smaller than the RO's, but their surface area equals that of the T1 caliper pistons giving this brake DH stopping power without a massive weight penalty. PM6 one-piece body with new Oval pistons (ñÿ24 mm equivalent). Body Finish: Matte Black. Nut color: Red. Screws color: Steel.