Genuine Sinotruk Rear Hub Stud d-22 – Unbreakable Strength & Uncompromised Wheel Security

Engineering Excellence Behind the d-22 Rear Hub Stud

The d-22 rear hub stud is a critical safety component that bears the full weight of the vehicle and cargo, transmitting driving and braking forces from the wheel to the axle. Its material is a medium‑carbon alloy steel (similar to SAE 4140), which is quenched and tempered to achieve a tensile strength of over 1,000 MPa and a yield strength exceeding 900 MPa. The thread is rolled, not cut, which work‑hardens the surface and eliminates the stress concentrations that can lead to fatigue failure under repeated loading.

In a typical Howo or Sinotruk heavy‑duty truck, the rear hub studs are subjected to extreme torque, vibration, and thermal cycling from braking. The d-22 is designed with a generous fillet radius at the head‑to‑shank transition to minimise stress risers, and its length is precisely controlled to ensure proper engagement with the wheel nut and sufficient thread protrusion for visual inspection.

Nigerian roads, with their potholes, corrugations, and heavy loads, place extraordinary demands on wheel fasteners. The d-22 is tested to withstand over 1 million fatigue cycles at full load without failure, and its zinc‑flake coating provides a corrosion resistance that exceeds 1,000 hours of salt spray testing. This ensures that the studs remain removable for maintenance and do not seize in the hub, a common problem with inferior fasteners.

Technical Specifications – Rear Hub Stud d-22

Parameter	Specification
OEM Part Number	d-22
Product Name	Rear hub stud (wheel stud)
Brand	Sinotruk (Genuine OEM)
Material	Alloy steel (SAE 4140 equivalent)
Thread Size	M22 x 1.5 (metric fine)
Overall Length	85 mm
Thread Length	40 mm
Shank Diameter	22.0 mm (nominal)
Head Type	Hex‑style (18 mm socket)
Tensile Strength	≥ 1000 MPa
Yield Strength	≥ 900 MPa
Hardness (HRC)	32 – 38
Coating	Zinc‑flake (anti‑corrosion)
Torque Specification	450 – 500 N·m (with lubricated threads)
Weight (per stud)	0.28 kg
Compatible Models	Howo A7, T7, C7H; Sinotruk rear axles (drive and trailer)
Replacement Interval	Inspect at every tyre change; replace if threads damaged, stretched, or corroded

Why the Genuine Sinotruk d-22 Outperforms Aftermarket Studs

Aftermarket wheel studs often use lower‑grade steel, cut threads (which are weaker), and inadequate coatings that lead to premature stretching, thread galling, and seizure. The d-22, by contrast, is manufactured using a multi‑stage forging and rolling process that aligns the grain structure of the steel, maximising strength and fatigue life. Its rolled threads are not only stronger but also provide a smoother surface finish that reduces wear on the wheel nuts and improves torque retention.

Additionally, the d-22 is dimensionally identical to the original equipment, ensuring that the wheel nuts engage with the correct number of threads and that the wheel centering is maintained. This eliminates the risk of wheel run‑out, vibration, or uneven tyre wear that can result from mismatched studs. By choosing the genuine Sinotruk d-22, you protect your wheels, tyres, and braking system from the costly consequences of fastener failure.

Superior Materials and Manufacturing for Extreme Conditions

The alloy steel used in the d-22 is vacuum‑degassed to remove impurities, ensuring consistent mechanical properties throughout the stud. The heat‑treatment process is computer‑controlled to achieve the optimal balance of strength and ductility, reducing the risk of brittle fracture. The zinc‑flake coating provides excellent corrosion protection even when the stud is exposed to salt, moisture, and brake dust.

Easy Identification and Fitment

The d-22 is clearly marked with the Sinotruk logo and the part number, making it easy to verify authenticity. Its length and thread dimensions match the factory specifications, so you can install it without modifications. Each stud is supplied with a new conical seat washer to ensure proper seating in the hub.

Explore the full catalogue of genuine Howo Parts available for your fleet, including wheel studs, nuts, and hub components. The d-22 rear hub stud is a vital part of that ecosystem — and with Sinotruk’s original quality, you ensure secure wheel attachment and long‑lasting reliability for your truck.

Installation Best Practices for the d-22 Rear Hub Stud

Replacing a rear hub stud should be performed with the wheel removed and the vehicle safely supported. Use a suitable stud press or a heavy‑duty stud installer tool to remove the old stud and install the new d-22 stud. Ensure that the stud is fully seated and that the splines engage correctly with the hub bore. Apply a small amount of anti‑seize compound to the thread (excluding the top few threads) to prevent galling during nut installation.

When tightening the wheel nuts, use a calibrated torque wrench and follow a star pattern to achieve uniform clamping force. Re‑torque the nuts after the first 50 km of driving to account for settlement. For Nigerian workshops, keeping a supply of d-22 studs ensures that you can quickly address broken or damaged studs, minimising downtime and preventing wheel separation incidents.

Built for Nigeria – Unshakeable Wheel Security on the Toughest Roads

Nigeria’s roads are notorious for their punishing effect on wheel fasteners — the combination of heavy loads, potholes, and extreme temperatures can cause even the strongest studs to fatigue. The d-22 is engineered to meet these challenges head‑on, with its high‑strength material, corrosion‑resistant coating, and precision‑rolled threads that maintain clamping force over hundreds of thousands of kilometres.

Moreover, the d-22 is compatible with the full range of Sinotruk and Howo rear axles used in Nigeria, making it a versatile replacement part for mixed fleets. By choosing genuine Sinotruk studs, you reduce the risk of wheel loss, improve tyre life, and ensure that your vehicles meet the highest safety standards.

Secure Your Rear Wheels with the Genuine d-22

The d-22 rear hub stud is a small but critical component that directly affects wheel security, tyre wear, and overall vehicle safety. Its superior materials, precision engineering, and exact OEM fitment make it the only choice for professional fleet maintenance. By installing genuine Sinotruk d-22 studs, you ensure that your wheels remain securely attached, reducing the risk of costly accidents and unplanned downtime.

Never compromise on wheel fastening integrity with inferior aftermarket studs that can fatigue, stretch, or corrode. Insist on the genuine d-22 — the rear hub stud trusted by Nigeria’s leading fleet operators and workshops. With its proven durability and uncompromising quality, this component delivers the strength and reliability that keep your business moving forward.

Genuine Sinotruk d-22 – Strength, safety, and reliability for every wheel revolution.

Packaging & Shipping

Every Howo part is carefully packaged and shipped to ensure it arrives in perfect condition, ready for installation. Our professional logistics process guarantees timely delivery across Nigeria.

Secure Packaging

Each Howo part is individually wrapped in protective materials and placed in reinforced cardboard boxes to prevent damage during transit.

Dedicated Transport

We use our own Sinotruk logistics fleet for reliable delivery, ensuring parts reach customers quickly and safely across all regions of Nigeria.

Quality Inspection

Before shipping, each part undergoes final quality checks and is clearly labeled with its OEM number for easy identification.

Nationwide Distribution

Our extensive distribution network covers all major cities and rural areas in Nigeria, ensuring prompt delivery to construction sites, workshops, and businesses.

Shipping Information for Nigerian Customers

• Standard Delivery: 3-5 business days to major cities (Lagos, Abuja, Port Harcourt, Kano)

• Express Delivery: 1-2 business days available for urgent orders

• Regional Coverage: We deliver to all 36 states including remote areas

• Tracking: All shipments include real-time tracking information

Upgrade Your Sinotruk Truck Today with Howo parts!

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For more information on our product range, explore our catalog of reliable components. Howo parts are just one example of our dedication to excellence in the automotive sector.

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