# Adjustment Dial for GIRO Merit RL TRL Fit System helmet, black, size M

**URL:** https://aio.lv/en/product--giro-gr-7146420--11832861
**Data updated:** 2026-03-09 14:44 (EET)
**Category:** Protective Helmets
**Manufacturer:** GIRO
**Manufacturer code:** GR-7146420
**EAN:** 196178012478
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 10.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--giro-gr-7146420--11832861

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Replacement adjustment dial designed for GIRO Merit helmets with the RL TRL Fit System. This black size M dial fits the helmet's retention mechanism to adjust fit and tension. Intended for repair or upgrade of the helmet's fit system, it restores secure, incremental adjustability and comfort for cycling and outdoor use.

## Long description

This Adjustment Dial is a replacement part designed for Giro Merit helmets equipped with the RL TRL Fit System. Finished in black and sized M, the dial restores the helmet's retention mechanism, allowing incremental adjustments to head circumference and tension. Intended for repair or upgrade, the component helps maintain a stable and consistent fit for cycling and other outdoor activities where a secure helmet is required.
Advantages
The replacement dial provides precise micro-adjustments to the retention system, enabling users to fine-tune fit and comfort without altering helmet shell or padding. Its form factor matches the original Giro RL TRL interface to ensure correct engagement with the retention band. Using an original-style dial preserves the helmet's designed adjustment range and keeps the fit mechanism functioning as intended.
Suitable for
Repairing a Giro Merit helmet with a worn or damaged adjustment dial
Replacing a lost or broken retention dial to restore fit control
Upgrading an older fit system component to regain precise tensioning
Maintaining consistent helmet fit for road cycling, commuting, and recreational rides
Key specifications
Compatibility: Giro Merit helmets with RL TRL Fit System
Color: Black
Size: M (medium dial sized for corresponding retention band)
Function: Micro-adjustment dial for head circumference and retention tension
Material: Durable polymer construction designed for repeated adjustment
How to use
To install, remove the damaged dial from the retention assembly by following the helmet manufacturer's disassembly instructions, then fit the replacement dial onto the retention band until it clicks into place. Rotate the dial clockwise or counterclockwise to increase or decrease tension and achieve the desired fit. Verify the dial engages smoothly with the retention track and that the helmet sits level and snug on the head. If resistance or misalignment is detected, stop and re-seat the dial to avoid damaging the retention system.
Usage recommendations
Inspect the retention system periodically for wear and functionality; replace the dial if adjustment becomes stiff, loose, or non-functional. Use only components compatible with the RL TRL Fit System to maintain helmet safety characteristics and avoid modifying structural parts of the helmet.

## FAQ

### How much does the GIRO Merit RL TRL Fit System adjustment dial, size M cost, and is it available for purchase?

The price is 12.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 08.07.2026 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. 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 GIRO 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 GIRO 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/11832861/67233417_large.webp