The best dirt bike rear spring or shock depends on your bike’s required length, mounting dimensions, and spring rate. The Aiomhao 290mm and 295mm springs are options for compatible DNM MK-AR setups; the MDEOOSKY is aimed at smaller minibikes and similar vehicles; the NACORE targets specified electric dirt bikes; and the AuryngMD is a size-defined choice for selected 50cc–125cc models. Compare measurements before ordering, because engine size or brand alone does not confirm fit.
| Product | Best suited for | Listed specification |
|---|---|---|
| Aiomhao DNM MK-AR 290mm | Compatible pit bikes | 290mm, 1000LBS |
| Aiomhao DNM MK-AR 295mm | Compatible pit bikes needing a 295mm spring | 295mm, 1000LBS |
| MDEOOSKY Rear Shock | Small dirt bikes and minibikes | 750lb; length details require verification |
| NACORE Rear Shock | MX650/500 and SX500 electric dirt bikes | 8.7 inches / 221mm |
| AuryngMD Rear Shock | Selected bikes requiring matching dimensions | 255mm eye-to-eye |
Aiomhao DNM MK-AR 290mm Spring
This spring is listed as a DNM MK-AR rear shock spring measuring 290mm, with a 1000LBS specification. The product description identifies pit dirt bikes as its intended application and directs buyers to check the full fitment details for additional compatibility information.
Best for: Pit-bike owners who have confirmed that their existing setup calls for a 290mm DNM MK-AR spring. It was selected as a direct size-specific option among the listed products.
Check before buying: Do not assume that 290mm is the right length based on bike model alone. Confirm the required spring dimensions and fitment; the listing does not provide a complete vehicle fitment list in the supplied details.
Aiomhao DNM MK-AR 295mm Spring
This Aiomhao spring is specified for a DNM MK-AR setup and measures 295mm. Its listed spring specification is 1000LBS, and the description names pit dirt bikes as the intended general application.
Best for: Riders whose existing rear shock requires a 295mm spring and whose fitment matches the DNM MK-AR listing. Compared with the 290mm option, this is the better choice only when the extra length matches the bike’s required dimensions.
Check before buying: A five-millimeter difference can matter when replacing a spring. Verify the current spring and shock requirements rather than choosing between the two Aiomhao options by appearance.
MDEOOSKY 750lb Rear Shock
MDEOOSKY describes this as a 750lb rear shock for a range of small vehicles, including selected 47cc–125cc dirt bikes, ATVs, go-karts, scooters, and minibikes. The listing says its construction uses steel and aluminum alloy and claims resistance to corrosion, rust, and wear.
Best for: Buyers looking for a replacement shock for a small dirt bike or minibike who can confirm the measurements and vehicle fitment. The broad application list makes it relevant to several small-vehicle categories.
Check before buying: The supplied product title says 160mm, while the feature details state that the shock length is 125mm. Confirm the actual dimensions with the seller and compare mounting points before ordering. The broad fitment list does not guarantee fit on every listed vehicle size.
NACORE 221mm Electric Dirt Bike Shock
This NACORE rear shock is listed at 8.7 inches, or 221mm, and is described for the MX650, MX500, and SX500 electric dirt bikes, as well as additional pit bikes. The listing highlights damping intended to support stability and a smoother ride.
Best for: Owners of a named electric dirt bike model who have verified that the shock’s dimensions and mounting arrangement match their original part. Its listed model fitment makes it more targeted than a general-purpose spring.
Check before buying: The supplied details do not specify spring rate or mounting measurements. Confirm those requirements if you are replacing only a spring or fitting the shock to a different bike.
AuryngMD 255mm Heavy-Duty Rear Shock
AuryngMD lists this shock at 255mm, measured eye-to-eye, with 10mm mounting holes and a 66mm spring outside diameter. It is intended for selected 50cc–125cc dirt bikes, pit bikes, ATVs, quads, go-karts, and mini electric dirt bikes. The description names several common Chinese-style brand families while emphasizing measurement checks.
Best for: Buyers who need a complete shock and can match all listed dimensions. It is a useful option to compare when the original shock is 255mm eye-to-eye and the mounts and spring clearance also match.
Check before buying: Listed brand names do not guarantee compatibility with every model or year. Measure eye-to-eye length, bolt diameter, mounting width, and spring clearance.
Buying Guide: How to Choose a Dirt Bike Rear Spring
Are you replacing a spring or a complete shock?
A spring-only replacement must match the shock it fits, including the required length and spring specifications. A complete shock includes the spring and shock assembly, so it may be the relevant category when replacing the entire unit. The products above include both types; check each listing’s description before comparing them.
Which measurements should you check?
Measure the existing part and compare it with the product details. For a complete shock, check eye-to-eye length, mounting-hole diameter, mounting width, and available clearance. For a spring, verify the required spring length and compatibility with the shock body. Do not treat a vehicle’s engine size as a substitute for measurements.
How should you compare spring rates?
The listed Aiomhao springs specify 1000LBS, while the MDEOOSKY lists 750lb. These figures alone do not establish which spring is correct for a rider or bike. Follow the shock or vehicle manufacturer’s requirements and consider the intended setup. Do not select a rate solely because it is higher or lower.
What if a listing gives conflicting dimensions?
Pause before ordering and request clarification. The MDEOOSKY product details supplied here give two different lengths: 160mm in the title and 125mm in the specifications. Confirm the correct measurement and mounting dimensions directly against the product information before purchase.
Frequently Asked Questions
Are a rear spring and a rear shock the same part?
No. A spring is one component of a suspension shock assembly. Some listings sell a spring, while others describe a complete rear shock absorber.
Will a 290mm spring fit a bike that uses a 295mm spring?
Do not assume so. Use the length and fitment required for the specific shock setup, and confirm compatibility before replacing a spring.
Does a product’s listed bike brand guarantee fit?
No. Model, year, mounting dimensions, and clearance can affect fit. Measure the existing part and verify the exact application.
What does eye-to-eye length mean?
It is the distance between the centers of the shock’s mounting points. The AuryngMD listing specifies a 255mm eye-to-eye length.
Should I choose a shock by engine size alone?
No. Engine size can help narrow options, but it does not confirm that the shock’s length and mounts will fit. Compare the physical measurements and vehicle fitment details.