Rubber Track 400x72.5x72N – Narrow Guide (Komatsu/Case)
Professional rubber track by Arisun, size 400x72.5x72 in N version. Dedicated to 4-5 ton mini excavators. This version features narrow internal guiding (Narrow Guide), which is a specific requirement for undercarriages found in many Komatsu, Case, and IHI models.
| Width: |
400 mm |
| Pitch: |
72.5 mm |
| Links: |
72 pcs |
| Version: |
N (Narrow Guide) |
Manufactured using Continuous Cord Technology. The N designation indicates narrowed guide lugs. This is a critical parameter for the machines listed below – using a standard (W) track on these models can lead to roller or track damage.
Key Technical Advantages:
- Type N (Narrow Guide): Precisely matched to narrower track rollers, typical for Komatsu MR series and older PC models.
- Reinforced Weight: Arisun tracks are approx. 10% heavier than standard aftermarket options, meaning a more robust build and thicker tread.
- Durability: Rubber compound resistant to cracks and abrasion, ensuring long service life.
Wide Compatibility (Brands & Models)
The 400x72.5x72N track fits the following models:
✅ KOMATSU: PC40MR, PC40MR-1, PC40MRX, PC40R-8, PC40 Avance R, PC45MR-1, PC45MR-2, PC45MRX, PC45R-8, PC45 Avance R, PC50-3, PC50FR-1, PC50FR-2, PC50M-2, PC50UU-3, PC50UUM-2, PC58
✅ CASE: CX50, 50 MAXI, 50 RTB
✅ IHI: 40G-1, 40GX-2, 40JX, 45J, 45J-2, 45NX-2, 45UJ, 45VX, IS45J
✅ KOBELCO: SK55SRX
✅ SUNWARD: SWE50, SWE50B, SWE55
✅ IMER: 45V
✅ FERMEC / MASSEY FERGUSON: MF150, MF145
⬇️ Don't see your machine here? A full, detailed list of all compatible models can be found in the table at the very bottom of the page.
Service Tip: When installing a new track, always inspect the undercarriage. Running a new track on a worn
drive sprocket or damaged idler will drastically shorten the track's lifespan.
Frequently Asked Questions (FAQ)
What is the difference between N and W versions?
The N (Narrow) symbol indicates narrow internal guiding. This is crucial for Komatsu and Case machines on this list, which have narrower roller spacing compared to brands like CAT (which require the W version).
Does it fit every Komatsu PC45?
Most models from the MR and Avance R series require this (N) version. However, it is always worth checking the marking on the old track or measuring the width of the internal guide lug to be 100% sure.
Catalog number: 400X72,5X72N
ARISUN is a manufacturer of rubber tracks for excavators and mini-excavators, designed for heavy-duty operation in challenging ground conditions. A reinforced steel core combined with a high-resistance rubber compound provides stability, reliable traction, and extended service life of the undercarriage system.
ARISUN rubber tracks are compatible with popular machine brands such as JCB, KOMATSU, KUBOTA, BOBCAT, TAKEUCHI, VOLVO, CAT, CASE, JOHN DEERE, YANMAR — depending on the selected track size. They perform well in earthmoving applications, trenching, construction work, road maintenance, municipal operations, and general site conditions, ensuring smooth machine movement even on soft or muddy terrain.
