Rubber Track 400x72.5x70N - Narrow Type
Professional Arisun brand rubber track with dimensions 400x72.5x70 in the N version. A product with an impressive weight of 260 kg, dedicated to mid-sized excavators from JCB and Komatsu. It features a reinforced internal construction, ensuring stability for machines weighing 4-5 tonnes.
| Width: |
400 mm |
| Pitch: |
72.5 mm |
| Number of links: |
70 pcs. |
| Weight / Version: |
260 kg / N (Narrow) |
The track is manufactured using Continuous Steel Cord (Jointless Technology). The material consists of high-quality rubber reinforced with a dense weave of steel cords and steel plates. The N designation indicates a narrow link guide profile, which is crucial for the proper seating of the track on rollers and sprockets in specific Japanese and British machine models.
Key Technical Advantages:
- CSC Technology: The absence of overlap points in the steel cords eliminates the risk of the track snapping under heavy loads.
- Weight 260 kg: Reflects the high density of the rubber and the thickness of the steel reinforcement, resulting in extreme resistance to cuts and tears.
- Width 400 mm: Provides excellent traction and low ground pressure, preventing the machine from sinking into soft or muddy terrain.
Wide Compatibility (Brands and Models)
The 400x72.5x70N track is dedicated to flagship midi-excavator models:
✅ JCB: 8040Z, 8040ZTS
✅ KOMATSU PC38: PC38, PC38.1, PC38UU, PC38UU.1, PC38UU.2
✅ KOMATSU PC40: PC40, PC40.1, PC40.5, PC40.6
✅ KOMATSU PC50: PC50, PC50.1, PC50UU, PC50UU.1
⬇️ Don't see your machine? A full, detailed list of all compatible models can be found in the table at the bottom of the page.
Service Tip: With a track weight of 260 kg, the condition of the
sprocket (drive wheel) is critical. Worn teeth will damage the steel links from the inside. After installing a new track, check the tension after the first 10 hours of operation.
Frequently Asked Questions (FAQ)
What does the N index mean?
The N (Narrow) symbol indicates a narrow type of internal guide. This is a decisive parameter for whether the track will stay stably on the rollers. Replacing an N-track with a wide version (W) without changing the undercarriage may result in frequent de-tracking.
Is jointless technology really better?
Yes. Traditional tracks have a joining point for the steel cords, which is their weakest spot. The Continuous Steel Cord technology used by Arisun involves winding a single continuous cord, which increases the track's tensile strength by approximately 40%.
