MEROCA AO6 rear air shock Model: AO6-190 mm x 51 mm - AL-6061 anodized body, adjustable pressure up to 250 psi

The MEROCA DNM AO-6 is a lightweight, fully adjustable aluminum-alloy rear air shock designed to replace or upgrade rear suspension on cross-country and urban mountain bikes with a 190 x 51mm eye-to-eye specification.

This rear shock combines an AL-6061 hard-anodized body, CNC-machined seals, and a high-pressure adjustable air chamber to deliver tunable rebound and progressive support while shaving weight compared with coil units. It ships pre-charged to a factory pressure and accepts user air-pressure adjustments up to a maximum of 250 psi, offering riders a wide tuning range for different loads and terrain. Bushings are included to match common mounting hardware, and the construction emphasizes corrosion resistance and long-term reliability for everyday riding.

How do I set the air pressure for my riding weight and style?

Start from the factory baseline (the unit is charged during production) and adjust incrementally. Increase pressure to firm up the shock under heavier loads or faster XC rides; reduce pressure for a softer, more compliant feel on rougher trails or slower technical sections.

• Use a reliable shock pump and pressure gauge for accurate filling.
• Maximum safe pressure: 250 psi — do not exceed this limit.
• Loosen the top-end screw, insert the ball pin, then pump air; re-tighten the screw after inflation.
• Make small adjustments and test ride to find the right sag and support.

What fitment and sizes does the AO-6 offer for frame compatibility?

The AO-6 is made to fit a range of common rear spacing standards with eye-to-eye and travel combinations; the model you choose must match your frame's specifications. Confirm the exact eye-to-eye length and travel your frame requires before ordering to ensure correct geometry and performance.

• Available eye-to-eye x travel options include 100 x 9mm, 125 x 20mm, 150 x 31mm, 165 x 41mm, and 190 x 51mm.
• Included top and bottom bushings measure 8mm x 24mm—verify these match your bolt diameters.
• CNC-machined eye interfaces reduce play and help prevent air or oil leaks.

What maintenance and durability should I expect from this aluminum air shock?

Constructed from AL-6061 with hard-anodized finishing and precision machining, the AO-6 resists wear and corrosion while keeping weight low. Regular inspection and basic service keep the seal surfaces healthy; follow safe inflation practices and scheduled maintenance intervals for longest life.

• Hard-anodized AL-6061 body for corrosion resistance and reduced friction.
• CNC machining and quality sealing minimize the risk of air or oil leaks.
• Periodic inspection of bushings and seals and correct air-pressure handling recommended.

How does the AO-6 compare to coil shocks for performance and weight?

Air shocks like the AO-6 are typically lighter than comparable coil shocks and offer easier on-the-fly tuning by adjusting air pressure. While coil units can deliver a very linear feel for heavy-duty or downhill use, the AO-6 favors riders who prioritize weight savings and customizable spring rates.

• Air design reduces overall weight versus coil alternatives.
• Pressure tuning gives a broad range of spring rates for different riders.
• Recommended for XC, city, folding bikes, scooters, and light trail use rather than heavy downhill abuse.

Who is this for: The MEROCA DNM AO-6 190 x 51mm rear air shock suits riders looking to upgrade to a lighter, adjustable air suspension on cross-country bikes, commuter and urban MTBs, or any compatible frame that accepts a 190mm eye-to-eye shock with 51mm travel. It’s also appropriate for tinkerers who want precise pressure tuning and the convenience of an aluminum, corrosion-resistant body. Confirm your frame’s required eye-to-eye dimension and bushing sizes before purchase to ensure a proper fit and trouble-free installation.