The RockShox Deluxe Ultimate is one of the most capable trail and enduro rear shocks in the RockShox lineup, pairing the DebonAir+ air spring with a refined damper for a ride that's supple and controlled across a wide range of terrain. This 185x52.5mm variant is suited to frames with a longer eye-to-eye and generous stroke travel.

• DebonAir+ air spring — supple initial stroke with a progressive ramp near bottom-out
• XL4S0 4-position air volume tune for dialling in the spring curve to your frame and style
• Reb55 rebound adjustment for fast, precise control of return speed
• Lightweight Deluxe Ultimate damper body
• 185x52.5mm sizing for select trail and enduro platforms

DebonAir+ uses a linked positive and negative air chamber design to create an exceptionally supple initial stroke — the shock moves freely through the first part of its travel, then builds progressively to resist bottom-out. The XL4S0 tune gives four distinct positions so you can tune the air spring to your exact frame kinematics without needing aftermarket volume spacers.

Fits frames specifying 185x52.5mm rear shock dimensions. Always verify your frame's mount standard, hardware sizing, and exact shock dimensions before ordering.