# Protective mountain bike helmet BELL 4FORTY AIR size M (55–59 cm) Matte White Black

**URL:** https://aio.lv/en/product--bell-bel-7139335--11833148
**Data updated:** 2026-03-09 14:44 (EET)
**Category:** Protective Helmets
**Manufacturer:** BELL
**Manufacturer code:** BEL-7139335
**EAN:** 5907558693690
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 150.49 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 124.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--bell-bel-7139335--11833148

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

BELL 4FORTY AIR is a protective mountain bike (MTB) helmet in size M (55–59 cm) finished in Matte White Black. Designed for trail and all-mountain riding, it features the model’s ventilation and impact protection design, adjustable fit for secure wear, and coverage suitable for off-road cycling. Ideal for riders seeking a reliable helmet for daily training and trail rides.

## Long description

BELL 4FORTY AIR size M (55–59 cm) in Matte White Black is a protective mountain bike helmet engineered for trail and all‑mountain riding. The helmet combines a ventilated shell design with impact protection features to provide coverage appropriate for off‑road cycling. Its adjustable fit system allows secure positioning on medium head sizes, while the matte two‑tone finish offers understated styling suitable for everyday training and trail sessions.
Advantages
The helmet delivers a balance of ventilation and protection through strategically placed vents and a molded shell construction that helps manage airflow and distribute impact forces. An adjustable retention system enables a customized, stable fit across the 55–59 cm range. The extended rear coverage typical of trail helmets offers extra protection for the occipital area without significantly increasing weight. Materials and build quality are intended for regular use in mountain biking conditions.
Suitable for
Trail riding and singletrack
All‑mountain and enduro training
Daily off‑road training sessions
Commuting on mixed surface routes
Key specifications
Size range: medium (55–59 cm)
Style: mountain bike / trail helmet
Finish: matte white and black two‑tone
Ventilation: multiple intake and exhaust vents for airflow
Fit system: adjustable retention for secure positioning
Coverage: extended rear/head coverage for off‑road protection
How to use
Place the helmet level on the head so the front rim sits just above the eyebrows. Adjust the retention system and side straps to achieve a snug, stable fit without excessive pressure. Ensure the chin strap is buckled and adjusted so two fingers fit between the strap and the chin. Check ventilation openings are unobstructed and that the helmet sits evenly during movement. Inspect the helmet regularly for signs of damage and replace it following any significant impact.
Usage recommendations
Use the BELL 4FORTY AIR for trail and all‑mountain activities where increased coverage and ventilation are required. Match the medium size to a head circumference of 55–59 cm, and replace the helmet after a major crash or when structural wear is observed. Clean the helmet with mild soap and water; avoid solvents or strong cleaners that can degrade materials.

## FAQ

### How much does the BELL 4FORTY AIR MTB helmet size M (55–59 cm) cost, and is it available for purchase?

The price is 150.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 14.07.2026 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, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can BELL 4FORTY AIR MTB helmet size M (55–59 cm) be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 BELL 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 BELL 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/11833148/67233678_large.webp