# Helmet BELL 4FORTY AIR MIPS — mountain bike helmet, size M (55–59 cm), solid matte black

**URL:** https://aio.lv/en/product--bell-bel-39280-255-m--12406178
**Data updated:** 2026-04-30 18:36 (EEST)
**Category:** Protective Helmets
**Manufacturer:** BELL
**Manufacturer code:** BEL-39280-255-M
**EAN:** 199270049113
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 148.49 €
**Prices and availability valid until:** 2026-08-19 23:59
**Price without VAT (21%):** 122.72 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--bell-bel-39280-255-m--12406178

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

BELL 4FORTY AIR MIPS is a mountain bike helmet with MIPS rotational impact protection, designed for trail and enduro riding. Size M fits 55–59 cm heads. Features include multiple vents for airflow, adjustable retention system for a secure fit, and a lightweight shell for everyday riding and off-road use.

## Long description

BELL 4FORTY AIR MIPS is a mountain bike helmet designed for trail and enduro riding. The helmet in size M fits head circumferences from 55 to 59 cm and combines a ventilated, lightweight shell with an adjustable retention system and integrated rotational impact protection. Multiple vents and internal channels promote airflow for longer rides, while the compact profile and matte black finish offer a neutral, low-visibility appearance suitable for diverse off-road conditions.
Advantages
The helmet incorporates a MIPS rotational protection layer to reduce rotational forces during certain impacts and features an adjustable fit system to stabilise the helmet on the head. Its ventilated construction and internal channeling help maintain comfort in warm conditions, and the lightweight shell reduces neck fatigue during extended use. The matte black finish is resistant to showing dirt and blends with a wide range of kit. The overall design balances protection, ventilation, and user-adjustable fit for everyday trail and enduro riding.
Suitable for
Trail riding and enduro sessions where ventilation and rotational protection are priorities
Riders with head circumference of 55–59 cm seeking a secure, adjustable fit
Daily off-road use and longer rides that require reduced weight and good airflow
When it may not be suitable
This helmet is tailored to trail and enduro use; it may not provide the extended face and jaw protection required for downhill-specific racing or e-bike speeds above typical trail limits. Riders who require a full-face helmet or models specifically certified for higher-speed impacts should consider helmets designed for those disciplines. Additionally, if a rider’s head circumference falls outside the 55–59 cm range, a different size will be necessary for proper protection.
Key specifications
Intended use: mountain biking — trail and enduro
Size range: medium, fits 55–59 cm head circumference
Protection features: integrated rotational impact protection layer
Ventilation: multiple vents with internal airflow channels
Fit system: adjustable retention system for a secure fit
Shell: lightweight construction for reduced fatigue during extended rides
Finish: solid matte black
How to use
Place the helmet level on the head so the front rim sits just above the eyebrows. Adjust the retention system until the helmet feels secure but comfortable; the helmet should not move significantly when you shake your head. Fasten and adjust the chin strap so it sits snugly under the chin with the side straps forming a V just below each ear. Inspect vents to ensure they are clear of debris and perform a visual inspection for damage before each ride. Replace the helmet if it sustains a significant impact or shows visible signs of compromise.
What to consider before purchase
Confirm your head circumference is within the 55–59 cm range for proper fit
Decide whether trail/enduro protection with rotational technology meets your riding discipline needs
Consider whether you need features not offered here, such as full-face coverage or additional certifications for higher-speed riding
Usage recommendations
For optimal protection and comfort, pair the helmet with clean straps and a regularly adjusted retention system; consider using compatible eyewear and ventilation-compatible liners to improve airflow and manage perspiration during longer rides.

## FAQ

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

The price is 148.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 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 03.08.2026 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 MIPS helmet 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