AuryngMD 240mm Rear Shock Absorber for Pit & Dirt Bikes — 11mm Heavy-Duty Spring, Nitrogen-Charged

AuryngMD's 240mm rear shock absorber is a factory nitrogen-charged, heavy-duty replacement shock with an 11mm coil spring (≈380 lb/in) designed for selected pit bikes, dirt bikes and electric dirt bikes that match its mounting dimensions.

This single-shock unit is built to provide firmer suspension support for off-road use where stronger spring rates and consistent damping matter more than plush comfort. Fitment depends on exact mounting measurements, frame clearance and the suspension setup — not simply bike make or engine size. Compare the shock’s eye-to-eye length, overall length, mounting-hole diameter and spring dimensions with your original shock before purchasing.

How do I confirm this shock fits my bike?

Fitment is determined by physical dimensions and clearance rather than brand names. Measure the same points on your original shock and match them to the AuryngMD specifications to determine compatibility.

• Eye-to-eye length: 240 mm (9.45") — the primary fit dimension.
• Overall length: ~275 mm (10.83") — allows for end cap and hardware differences.
• Mounting-hole diameter: 10 mm (0.39") and mount width: 20 mm (0.79").
• Compare coil outer diameter (71 mm) and clearance around the swingarm/frame.

What kind of ride should I expect with the 11mm spring?

The 11mm heavy-duty coil spring has a stiffer rate (~380 lb/in) than many soft OEM shocks, producing firmer support and reduced bottoming in aggressive or loaded riding. It favors control and stability over a comfort-first feel.

• Approximate spring rate: 380 lb/in for firmer rebound and compression control.
• Spring-wire diameter: 11 mm for increased durability under load.
• May require preload adjustment to tailor ride height and firmness.
• Best for riders who need stronger support for off-road or heavy-duty use.

What maintenance and adjustments are required?

This shock comes pre-charged with nitrogen at the factory and is intended as a low-maintenance component; routine gas refilling or pressure alteration is not required and should only be done by a qualified technician if ever needed.

• Factory nitrogen charge: about 0.8 MPa (116 PSI) — do not release or refill yourself.
• Adjustable spring preload lets you fine-tune sag and ride height for different conditions.
• Inspect mounting hardware, clearance, and surrounding parts at installation and before each ride.
• Professional installation recommended to ensure correct torque and alignment.

Which situations or riders benefit most from this shock?

This AuryngMD shock suits riders who need a robust aftermarket option for selected pit bikes, dirt bikes and electric dirt bikes where mounting dimensions match. It’s tailored for off-road use, heavier riders, luggage/cargo loads, or aggressive riding styles requiring firmer control.

• Riders preferring firmer suspension and reduced bottoming over plush comfort.
• Applications with frequent off-road impacts or heavier loads.
• Owners of bikes with matching mounting geometry seeking an upgrade or replacement.
• Mechanics and tuners who will set spring preload and verify installation.

Who is this for: The AuryngMD 240mm rear shock is aimed at riders and mechanics who need a heavy-duty replacement or upgrade for selected small to mid-size off-road motorcycles and electric dirt bikes, provided the shock’s mounting dimensions match their frame. If you value consistent nitrogen-charged damping, a strong 11mm coil spring, and the ability to set preload for specific riding conditions, this unit is a practical choice. If you require a softer, comfort-oriented ride or your bike’s mounting dimensions don’t align, consider alternative shocks that match those needs.