# Bicycle Helmet nils extreme MT311 White Size S (52–56 cm)

**URL:** https://aio.lv/en/product--nils-extreme-5908261688881--12075915
**Data updated:** 2026-03-12 21:55 (EET)
**Category:** Protective Helmets
**Manufacturer:** nils extreme
**Manufacturer code:** 5908261688881
**EAN:** 5908261688881
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

nils extreme MT311 is a bicycle helmet in white, size S (52–56 cm). It features a protective hard outer shell and internal padding for impact absorption and comfort. Designed for everyday cycling and urban rides, the helmet provides adjustable fit for head circumferences 52–56 cm and basic ventilation to help keep the rider cool.

## Long description

The nils extreme MT311 White Size S (52–56 cm) is a bicycle helmet designed for everyday cycling and urban rides. It combines a hard outer shell with internal padding to provide basic impact protection and wearer comfort. The helmet fits head circumferences from 52 to 56 centimetres and includes an adjustable retention system and straps to secure a stable fit during short commutes, leisure rides and city cycling.
Advantages
The hard outer shell increases resistance to abrasion and distributes impact forces across the helmet surface, while the internal padding absorbs shocks and improves comfort. The adjustable fit system enables quick size tuning for a snug fit within the 52–56 cm range. Integrated ventilation channels support air circulation to reduce heat build-up during typical urban use. Lightweight construction reduces neck strain on short rides.
Suitable for
 Daily commuting and city cycling
 Leisure and fitness rides on paved routes
 Short errands and multi-stop urban trips
 Beginners and casual cyclists seeking basic protection
Key specifications
 Color: white
 Size range: 52–56 cm head circumference (Size S)
 Construction: hard outer shell with internal padding
 Fit adjustment: adjustable retention system and chin straps
 Ventilation: basic ventilation channels
 Intended use: urban and everyday cycling
How to use
Place the helmet on your head so it sits level and covers the forehead without tilting back. Adjust the retention system until the helmet feels snug but comfortable, then fasten and tighten the chin strap so two fingers fit between the strap and your chin. Check that the helmet does not move excessively when you shake your head. Replace the helmet if it sustains a significant impact or shows visible damage.
Usage recommendations
For optimal protection, ensure the helmet size matches your head circumference and perform a fit check before each ride. Keep the helmet clean and dry, avoid using solvents or abrasive cleaners, and store it away from direct sunlight and extreme temperatures. Follow local safety regulations and replace the helmet after any major impact or after several years of regular use, according to manufacturer guidance.

## FAQ

### 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 nils extreme 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 nils extreme 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

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