# Inner Tube FISCHER Dunlop Valve 20" (50.80 cm) compatible with ETRTO sizing

**URL:** https://aio.lv/en/product--fischer-85109--3472384
**Data updated:** 2026-02-12 09:53 (EET)
**Category:** Bicycle accessories
**Manufacturer:** FISCHER
**Manufacturer code:** 85109
**EAN:** 4008153851094
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fischer-85109--3472384

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

FISCHER inner bicycle tube with a Dunlop (Woods) valve, sized 20 inches (50.80 cm) and matching ETRTO standards. Designed for replacement or spare use on compatible 20" wheels, it provides an airtight seal and straightforward installation. Suitable for city bikes, folding bikes and small-wheeled bicycles where a 20" ETRTO tube is required.

## Long description

FISCHER inner tube with a Dunlop (Woods) valve in 20" (50.80 cm) size, manufactured to match common ETRTO sizing for small-wheeled bicycles. This replacement tube is intended for use where a 20" ETRTO inner tube is specified, offering a standard rubber construction that provides an airtight seal and reliable pressure retention. The Dunlop valve design allows for easy inflation using pumps compatible with Woods/Dunlop valves and is commonly found on city, folding and certain children's bikes.
Advantages
The tube is designed to provide a consistent fit for 20" ETRTO tire assemblies and to restore airtight performance after puncture repair or replacement. Its Dunlop valve offers a balance between compatibility and ease of use, enabling simple inflation with many common pumps without additional adapters. Made from durable but flexible inner tube rubber, it combines puncture resistance typical of standard tubes with straightforward installation and removal.
Suitable for
City bicycles with 20" (50.80 cm) wheels
Folding bicycles requiring ETRTO 20" tubes
Small-wheeled commuter or leisure bikes
Bikes that specifically use Dunlop/Woods valve tubes
Key specifications
Tube size: 20" (50.80 cm) compatible with ETRTO 20" sizing
Valve type: Dunlop (Woods) valve
Material: standard inner tube rubber
Intended use: replacement/spare inner tube for 20" wheels
Valve length: standard length suitable for typical 20" rims
How to use
Inspect the tire and rim for sharp objects or damage before installation. Deflate and remove the wheel or, if preferred, work with the wheel mounted. Use tire levers to carefully pry one side of the tire bead over the rim, insert the Fischer inner tube, align the Dunlop valve through the rim hole, and seat the tire bead back onto the rim. Inflate gradually to the manufacturer-recommended pressure while checking that the tube is seated evenly and the valve is straight. After inflation, check for leaks and ensure the tire is properly seated before riding.
Usage recommendations
Choose the correct ETRTO 20" tire size when replacing the tube and confirm compatibility with your rim and pump. Keep a basic repair kit with tire levers, a pump compatible with Dunlop valves, and a patch kit for on-the-road repairs. If frequent punctures occur, consider using higher-durability tubes or additional tire protection layers.

## FAQ

### How much does the FISCHER Bicycle Tube Dunlop Valve 20" cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All FISCHER products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized FISCHER service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/3472384/52106434_large.webp