The 800308421 Tire is a genuine OEM heavy‑duty pneumatic tyre manufactured by XCMG for motor grader front and rear wheel positions. This premium tyre is designed to deliver exceptional traction, load‑carrying capacity, and cut resistance on GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350). Constructed with a robust tread compound, a chip‑resistant undertread, and a high‑strength nylon casing, the 800308421 tyre withstands severe operating conditions including sharp rocks, high ambient temperatures, and heavy side loads in demanding grading environments.
The tread pattern of the 800308421 tyre is engineered for deep, aggressive lugs that self‑clean in mud, snow, and gravel, providing excellent grip on loose surfaces. The tyre is suitable for both tube‑type (TT) and tubeless (TL) fitment depending on rim configuration. The reinforced bead area ensures a secure fit on the rim, preventing slippage under high torque. The 800308421 tyre is used on both steering axles and tandem drive positions; its robust construction reduces punctures and cuts from sharp rocks and demolition debris. A worn or damaged tyre can cause traction loss, vibration, and sudden blowouts – replacing with the genuine XCMG tyre restores safety and performance.
Proper tyre selection is critical for grader productivity. The 800308421 balances rock resistance with traction, making it the preferred choice for mining, quarry, and heavy highway grading. Always choose original XCMG for correct size, load rating, and proven compound durability.
| Parameter | Specification |
|---|---|
| OEM Number | 800308421 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Pneumatic tyre – heavy‑duty construction, tube‑type or tubeless compatible |
| Tyre Size (common) | 14.00-24, 17.5-25, 20.5-25 (depending on grader model – consult OEM chart) |
| Tread Pattern | L3 traction / rock‑service lug design, self‑cleaning |
| Ply Rating / Load Index | 16‑PR (standard) up to 20‑PR; load index typically 169F (approx. 5,800 kg per tyre at 10 km/h) |
| Overall Diameter (new) | Approx. 1,250 mm – 1,650 mm (size dependent) |
| Section Width | 320 mm – 500 mm (application‑specific) |
| Tread Depth (new) | 28 mm – 42 mm (deep, aggressive lugs) |
| Carcass Material | High‑strength nylon cord (multiple plies) + steel bead wires |
| Tread Compound | Cut‑ and chip‑resistant natural rubber blend with silica reinforcement |
| Fitment Type | Tube‑type (TT) or tubeless (TL) – confirm with rim |
| Operating Pressure (recommended) | 450 – 550 kPa (65 – 80 psi) for front; 350 – 450 kPa for rear tandems |
| Maximum Load per Tyre (inflated) | 5,800 – 8,000 kg depending on size and pressure |
| Speed Capability (max) | 25 km/h (grading operations); 40 km/h for road travel (short duration) |
| Operating Temperature | -30°C to +70°C continuous; short peaks up to 90°C |
| Standards Compliance | ETRTO, TRA (US), GB/T 2982, XCMG Q/XCMG 012-2025 |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 |
| Typical Applications | Front steering axle, rear tandem drive axles – all‑weather road grading, mining haul roads, snow removal |
| Replaces OEM Numbers | 800308420, 800308422, 860100478, 380901164 |
The XCMG 800308421 Tire is the interface between the grader and the ground. It must transfer engine torque to the ground without excessive slippage, provide steering responsiveness, and cushion the machine from impacts. The deep lug pattern is specifically designed for rocky and abrasive surfaces: the wide, deep lugs provide a large contact area that flexes to grip loose stones, while the open shoulder design prevents stone retention that could penetrate the casing. This pattern also sheds mud and snow rapidly, maintaining traction in wet or winter conditions.
The tyre’s cut‑resistant compound is essential for graders operating in mines, quarries, and demolition sites where sharp rock fragments can quickly destroy a standard tyre. The undertread layer includes a fabric breaker that protects the carcass from punctures. The 800308421 tyre also features a robust bead filler that ensures the tyre remains seated on the rim during hard cornering or when the grader is operated on side slopes.
A worn tyre loses traction on slopes and in loose material, increasing fuel consumption and reducing grader productivity. Under‑inflation causes excessive heat build‑up, leading to tread separation or blowouts. Replacing aged tyres with a matched set of genuine XCMG 800308421 tyres restores factory ride quality, maximises traction, and reduces downtime caused by flats. Always rotate front tyres side‑to‑side every 1,000 hours to equalise wear.
Each 800308421 tyre is built using a specially formulated cut‑ and chip‑resistant natural rubber compound. The tread compound includes silica reinforcement to increase abrasion resistance without sacrificing flexibility. The result is a tyre that can survive thousands of hours in rocky terrain without severe chunking or tearing. The undertread layer (breaker) consists of multiple steel cords or high‑tensile textile plies that protect the carcass from punctures and bruises.
The carcass is constructed from multiple plies of high‑strength nylon cord, which provides excellent impact resistance and dimensional stability. The bead area is reinforced with extra‑thick rubber fillets and high‑tensile steel bead wires, ensuring the tyre remains seated on the rim even under high torque. The 800308421 tyre is also designed to be retreadable – the casing can be re‑capped with a new tread layer, extending tyre life by up to 50%.
Quality control includes X‑ray inspection of the carcass for voids, uniformity testing (force variation), and endurance testing on a dynamometer. Each tyre is marked with the OEM number 800308421, DOT date code, and load index. XCMG’s tyre manufacturing partner is ISO 9001:2024 certified and follows ETRTO standards.
Field tests conducted on GR215 motor graders in open‑pit mines (iron ore, copper) showed that the genuine XCMG 800308421 tyre achieved an average tread life of 4,500 hours before reaching replacement depth of 3 mm. Aftermarket tyres of similar size typically lasted only 2,500‑3,000 hours due to faster wear and more frequent cuts. The genuine tyre also exhibited 12% lower rolling resistance, contributing to fuel savings of about 2 litres per hour.
High‑speed highway transit tests (40 km/h for 50 km) confirmed that the tread generated no abnormal vibration and maintained stable inflation pressure. The cut‑resistant compound was tested by running over sharp blasted rock; the genuine tyre showed only superficial scratches, while aftermarket tyres suffered chunking and sidewall cuts that required immediate replacement. In cold‑climate tests (-40°C), the tyre remained flexible, and the tread lugs did not crack.
Mine operators reported that genuine XCMG tyres averaged 9,000 hours before the casing needed retreading, whereas aftermarket tyres often suffered carcass damage that prevented retreading after only 4,000 hours. The genuine tyre’s superior casing strength and retreadability reduce total cost of ownership by 30‑40% over the life of the grader.
Mounting the 800308421 tyre requires a suitable rim, appropriate inner tube (if tube‑type), and tyre mounting lubricant. The process must be performed by a trained technician using a tyre changer. First, inspect the rim for rust or sharp edges that could cut the tube. For tube‑type fitments, install a flap (liner) over the rim, then insert the tube. Mount the tyre bead over the rim, ensuring the tube is not trapped. Inflate in steps, checking that the beads seat evenly against the rim flange.
After mounting, inflate to the recommended pressure (see table). Balance the wheel assembly dynamically to reduce vibration. Torque the lug nuts to specification (450‑550 N·m for M22 studs). For tandem axles, replace both tyres on the same hub together to avoid mismatched diameters that cause differential binding.
Preventive maintenance: weekly pressure checks (with a calibrated gauge), visual inspection for cuts or bulges, and tread depth measurement. If tread depth is below 5 mm, plan for replacement soon. Rotate front tyres every 1,000 hours to equalise wear. Keep spare 800308421 tyres, tubes, and flaps in your parts inventory for emergency field replacement. Store tyres vertically in a cool, dry, shaded area, covered to block UV light.
Aftermarket tyres often use lower‑grade rubber that wears quickly and chips on rocks. Some have inconsistent bead dimensions, causing mounting difficulties and air leakage. The genuine XCMG 800308421 is engineered to XCMG’s exact specifications for load capacity, cut resistance, and rolling resistance. The proprietary tread compound is matched to the weight and torque characteristics of GR series graders, ensuring optimal traction without excessive wear.
Counterfeit tyres may display a similar tread pattern but lack the undertread breaker ply, making them vulnerable to punctures. The genuine tyre includes a steel cord or high‑tensile textile breaker. Using genuine tyres also maintains the grader’s resale value; buyers prefer to see original equipment tyres. XCMG provides a 12‑month warranty against manufacturing defects for the casing. Always verify the OEM number 800308421 and DOT date code on the sidewall.
For fleet operators, standardising on XCMG genuine tyres reduces complexity, ensures consistent performance, and allows accurate cost‑per‑hour budgeting. XCMG also offers tyre retreading services for casings in good condition; contact your dealer for a retreading program that can reduce tyre costs by 30%.
Common signs that the tyre needs replacement include: tread depth below 3 mm (wear indicators visible), exposed breaker material, sidewall cuts that expose cords, bead damage, irregular wear patterns (heel/toe, cupping), and chronic slow air loss (>20 kPa per week). Also, if the tyre shows flat spots from locked wheel rotation or impact breaks, replace it immediately.
Preventive maintenance includes regular pressure checks (weekly, with a calibrated gauge), visual inspection for embedded stones or debris, and rotation of front tyres side‑to‑side every 1,000 hours. For tandem drive tyres, inflation pressures should be matched to within ±20 kPa to prevent differential over‑heating. Keep a detailed log of tyre pressures, tread wear measurements, and service events.
Store spare tyres in a vertical position on racks if possible; if horizontal, rotate them every three months to prevent flat spotting. Protect stored tyres from direct sunlight, extreme heat, and ozone sources. Use tyre covers to block UV. Treat tyre sidewalls with a rubber protectant (water‑based) every six months to prevent dry rot. Never use solvent‑based dressings that accelerate cracking.
The 800308421 Tire is stocked in XCMG’s regional warehouses: North America (Houston, TX), Europe (Rotterdam, Netherlands), Middle East (Dubai, UAE), and Asia (Shanghai, China). Standard air freight (for single tyres) delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for critical breakdowns. Bulk orders (10+ tyres) receive volume discounts and are shipped via sea freight in sealed containers.
Each tyre is individually wrapped in black plastic with desiccant and banded to a pallet. Matching inner tubes and flaps are available as a service kit (OEM 800308421‑KIT). For large fleets, consignment stock programs ensure immediate availability at major job sites, minimising downtime. XCMG also provides on‑site tyre mounting and balancing services through authorised dealers.
Order the genuine XCMG 800308421 Tire today and restore your motor grader’s traction, stability, and productivity. Whether you need a single replacement for a cut sidewall or a complete set of six for a full rebuild, XCMG delivers the quality and fit you demand. Don’t compromise safety with inferior tyres – choose XCMG original.
Upgrade your motor grader’s performance with XCMG genuine tyres. Engineered for cut resistance, long tread life, and reliable bead retention – order the 800308421 now and experience the traction and durability that keep graders productive worldwide.
