When weight is a bigger factor, Shimano BR-MT600 two-piston brake calipers just might be the ticket. They offer the same consistent braking and excellent modulation but shave weight than the four-piston M6220 model. The M6200 incorporates the same features as the entire caliper line, designed to keep braking stable over a wider range of temperatures. Two-piece construction provides a rigid, durable design 2-Piston design prioritizes weight savings and modulation New piston seal, heat resistant resin pistons, and Shimano's low-viscosity oil ensure that braking remains stable over a wide range of temperatures Includes G05S-MX resin pads