28 Inch Narrow Bicycle Inner Tubes AV DV FV 700x18-28C-BCC-281-Eastek

Product Description

AV Schrader valve 40mm small，700 x 18/28C， 18/25-622/630
DV Dunlop valve 40mm small，700 x 18/28C， 18/25-622/630
FV Presta valve 48mm small，700 x 18/28C， 18/25-622/630
28-inch bicycle inner tubes are available in three valve types: 40mm Schrader AV, 40mm Dunlop DV and 48mm Presta FV. All meet ETRTO 18/25-622/630 standards and fit road tyres from 700×18C to 700×28C. Premium butyl rubber ensures slow air leakage, lightweight narrow design suits city and road bikes for European daily cycling and long-distance rides.

Company Profile

Changzhou Eastek International Co., Ltd. was founded in 1999 by John Chiang. We are a professional supplier of parts and accessories for bicycle, motorcycle and auto from East China, headquartered in Changzhou about 150 kilometers from Shanghai. With abundant resources, it gives us advantages in procurement, logistics and combine goods easily from different suppliers and ship them as complete container loads.

Price and quality are our top priorities. We are convinced that price is the most central factor in retail – every further development of business models ultimately leads to price competition. We offer our customers advantageous prices and guarantee consistent quality standards. 

FAQ

Are you factory or distributor?
We are an integrated manufacturing and trading enterprise located in Changzhou, China. Founded in 1999, we have rich industry experience and sell products worldwide.

Which countries do you export to?
We ship globally, with main markets in European countries.

What products do you supply?
We specialize in parts and accessories for bicycle, motorcycle and auto with full customer support.

What are your competitive advantages?
1. OEM & ODM services are supported.
2. Customized products are acceptable.
3. Production lead time is within one month.
4. Professional teams covering production, sales and after-sales service.

How do you guarantee product quality?
1. We provide pre-production samples prior to mass production.
2. We have a dedicated QC team. All goods undergo rigorous testing and machine inspection before shipment to meet overseas market standards.
3. We offer a 12-month warranty. Timely after-sales support will be provided for any quality issues within the warranty period.

Can you send us samples?
We are happy to supply samples. Please provide your courier account (FedEx, UPS, DHL or others), as well as your full company name, shipping address, contact person and phone number.











1. Product Research and Development

We have an independent R&D team consisting of appearance and structural designers, electronic engineers and mold technicians. We also conduct extensive international cooperation with global designers. To enhance cross-border communication, we set up an office in Germany in 2017. By cooperating with renowned designers and collecting overseas market data continuously, we develop products that fit local market demands, ensuring our offerings satisfy mainstream consumer needs.

2. Product Production

We implement an open and efficient cost control model. We fully explore internal production potential to lower costs without compromising quality. Meanwhile, we maintain stable cooperation with reliable external partners to expand our production resources and optimize overall product cost performance.

3. Mold Making

Phone holder styles are updated rapidly. In-house mold development for every new style would cause high manufacturing costs and slow market response. Therefore, we leverage our foreign trade advantages to continuously source the latest popular models and promptly recommend trending styles to customers. We maintain a large phone holder database that is constantly updated to support diverse product selections.

4. Intellectual Property Rights

All suppliers are required to sign IP non-infringement commitments for every new model. We fully respect designers’ and developers’ creative efforts and provide reasonable intellectual property compensation. We aim to build a complete product-sharing industrial chain that enables original inventors to gain sustainable profits from every marketed product, inspiring more innovative and best-selling designs.

5. Services

We prioritize barrier-free and efficient customer communication. We currently provide localized services in multiple countries. Our staff communicate fluently with clients in their native languages to accurately understand requirements and achieve seamless cooperation. We will continue to recruit international talents to upgrade our localized services and bring better experiences to global customers.

6. Innovation and Development

We encourage customer participation in product innovation and welcome creative ideas to jointly turn original concepts into marketable products. For our IP-protected products, customers who pioneer local sales and meet specified sales volume standards are entitled to proportional commission compensation from subsequent local sales by other merchants.

On this basis, we have been maintaining business relationships with numerous customers for more than 15 years. We look forward to a long-term and trusting cooperation with you. Do not hesitate to contact us at any time if you have any questions, purchasing requests or special requirements. We will give you prompt and expert reply.