- Model No.: 3.00-18
- Diameter: 18"
- Certification: ISO, DOT, CE
- Trademark: DURO STAR
- Specification: CCC, E-MARK, ISO
- HS Code: 4011400000
- Type: Inner Tube
- Tire Design: Bias Belted Tyre
- Tread Pattern: Transverse Pattern
- Transport Package: Bags, Ctns and Bundles, Customer’s Request
- Origin: China
WHY CHOOSE US?
Our factory is one of the largest manufacturers of motorcycle tires and inner tubes in China. We specialize in producing high-quality inner tubes that meet international standards. Here's why you should choose us:
1. We offer both natural rubber and butyl inner tubes for motorcycles.
2. We provide competitive pricing and top-notch quality.
3. Free samples are available upon request.
4. We respond promptly to all inquiries with detailed information.
5. OEM orders are welcome.
6. Our main markets include South America, Southeast Asia, the Middle East, Africa, and other regions across Asia.
Q: What is your delivery time?
A: If we have stock, delivery can be arranged within 7 days. Otherwise, it typically takes 15–25 days after receiving the deposit.
Q: What packaging options do you offer?
A: We provide three options: colorful plastic wrappings (red, yellow, blue), unpacked, or custom packaging based on your requirements.
Q: What payment terms do you accept?
A: T/T: 30% deposit in advance, and the remaining balance against a copy of the B/L.
Q: Do you test all goods before delivery?
A: Yes, we conduct 100% testing before shipping.
1. High and stable quality: We maintain a strict quality control system from raw materials to finished products. Our modern lab ensures consistent material quality.
2. Prompt delivery time: Located near Qingdao Port, we can produce up to 80,000 inner tubes per week.
3. Quality warranty: Our company is certified under ISO 9001:2000.
4. Custom design: We can develop new products according to customer specifications.
5. Attractive packaging enhances product sales.
6. Advanced equipment and blending machines ensure top performance.
7. Our products are exported to over 100 countries, including South America, North America, Africa, and the Middle East.

Model | Weight(g) | Valve | Rubber content | Pulling strength | Elongation |
300-18 | 480 | TR4 | 30%-45% | 11-14MPA | 550%-650% |
It can be prepared by directly crushing natural calcite, limestone, chalk, shell, etc. by mechanical methods (using Raymond mill or other high-pressure mill). Because the sedimentation volume of heavy Calcium Carbonate is smaller than that of light calcium carbonate, it is called heavy calcium carbonate.
Heavy calcium carbonate is abbreviated as heavy calcium. It uses high-quality limestone as raw material and is processed into white powder by a lime mill. Its main component is CaCO3. Heavy calcium has the characteristics of high whiteness, good purity, soft hue and stable chemical composition. Heavy calcium is usually used as a filler. It is widely used in daily chemical industries such as artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, construction supplies, food, medicine, textiles, feed, toothpaste, etc. Increase the volume of products and reduce production costs. Used in rubber, it can increase the volume of the rubber, improve the processability of the rubber, play a semi-reinforcing or reinforcing role, and can adjust the hardness of the rubber.
Heavy Calcium Carbonate,Heavy Calcium Carbonate,Calcium Carbonate Heavy/Light Powder,CaCo3
Henan Shunbang Chemical Industry CO.,Ltd , https://www.pvcresinchemical.com