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

**URL:** https://aio.lv/en/product--bell-bel-38143-001-m--12405860
**Data updated:** 2026-04-30 18:35 (EEST)
**Category:** Protective Helmets
**Manufacturer:** BELL
**Manufacturer code:** BEL-38143-001-M
**EAN:** 199270047973
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 150.49 €
**Prices and availability valid until:** 2026-07-31 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-38143-001-m--12405860

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

BELL 4FORTY AIR INTEGRATED MIPS is a mountain bike helmet with integrated MIPS technology designed to reduce rotational forces during impacts. Size M fits 55–59 cm heads. The model emphasizes ventilation, safety and trail-focused protection for cross-country and all-mountain riding, suitable for everyday training and off-road adventures.

## Long description

BELL 4FORTY AIR INTEGRATED MIPS mountain bike helmet in size M (55–59 cm) is engineered for trail riders who prioritize ventilation, impact protection and a balanced fit. The helmet integrates MIPS rotational protection to help reduce rotational forces transmitted to the head during certain impacts, combined with a shell and liner designed for trail-focused coverage. The model emphasizes airflow and comfort for extended rides while maintaining protective features suited to cross-country and all-mountain use.
Advantages
The helmet delivers integrated MIPS technology for additional rotational impact mitigation, a design that promotes active airflow through multiple vents, and a shape that offers extended coverage around the temples and occipital area for trail protection. The fit in size M accommodates head circumferences from 55 to 59 cm and includes an adjustable retention system for a secure, customizable fit. Materials and construction aim to balance weight, durability and impact performance appropriate for everyday training and off-road riding.
Suitable for
 Cross-country and light to moderate all-mountain trail riding
 Daily training rides and multi-hour trail sessions
 Riders seeking increased rotational protection via integrated MIPS
 Cyclists who require a medium (55–59 cm) helmet size with adjustable fit
When it may not be suitable
This helmet is optimized for trail and cross-country use; it may not provide the same level of coverage or features required for downhill-specific riding with extreme impacts where full-face helmets are recommended. Riders who need very lightweight road-only helmets focused purely on aerodynamics might prefer a different, road-specific model.
Key specifications
 Intended use: mountain biking (trail, cross-country, all-mountain)
 Size range: medium, fits head circumference 55–59 cm
 Protection system: integrated rotational protection (MIPS)
 Ventilation: multiple intake and exhaust vents for active airflow
 Coverage: extended rear and temple protection for trail riding
 Adjustment: adjustable retention system for a tailored fit
 Color: black
How to use
Place the helmet level on your head so the front edge sits just above the eyebrows. Adjust the retention system and side straps so the helmet is snug but comfortable; the helmet should not move independently when you shake your head. Ensure the integrated MIPS liner remains positioned correctly as per manufacturer guidance. Use the visor to reduce glare on sunny trails and check vents remain clear of debris during and after rides. Inspect the helmet for any visible damage after impacts and replace it if integrity is compromised.
What to consider before purchase
 Measure your head circumference to confirm the 55–59 cm size (medium) is appropriate
 Decide whether integrated rotational protection (MIPS) and trail-oriented coverage match your riding style
 Consider helmet weight and ventilation needs for your typical ride duration and climate
 Check compatibility with goggles or eyewear if you frequently use them on the trail
Usage recommendations
Use the BELL 4FORTY AIR INTEGRATED MIPS helmet for regular trail sessions, maintaining a snug fit and checking the retention system before each ride; replace the helmet after any significant crash or when signs of wear, cracking or compression in the liner are present.

## FAQ

### How much does the BELL 4FORTY AIR INTEGRATED MIPS helmet M 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 — 2 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 20.07.2026 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 INTEGRATED MIPS helmet M 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/12405860/68692475_large.webp