Rock Shox Monarch RT3-HV Air Shock: Lightweight XC/All-Mountain racing oriented rear air shock: 215g. SoloAir spring system: single Schrader valve, dual chamber air spring with self-regulating negative pressure. Hard anodized, 28mm aluminum body-shaft with sag gradients and a 9mm aluminum damper-shaft, plus a high-volume (HV) air canister on longer (200/216mm) applications. Oil damping system with dual-flow rebound and 3-position compression+floodgate circuit adjustability.

Offered in Med/Low compression tunes for differing leverage ratio frame designs: High for 2.8+ ratio, Medium for 2.4-2.8 ratio, and Low for <2.4 ratio (leverage ratio = wheel/frame travel divided by shock travel/stroke). If in doubt or on the cusp, use a medium-rate shock since it has the widest range of damping adjustment.