Thumbnail for Two-piece Girodisc brake rotors with curved slots with black rotor hats and gold-colored hardware.

Thumbnail for Close-up image of a Girodisc 2-piece brake rotor viewed from the back

Two-piece Girodisc brake rotors with curved slots with black rotor hats and gold-colored hardware.

Close-up image of a Girodisc 2-piece brake rotor viewed from the back

A1-310 Girodisc Mercedes A45, CLA45, GLA45 Front Rotors

The Girodisc A1-310 two-piece front rotors are a direct, bolt-on upgrade for the AMG 45 platform. They retain factory calipers and brake bias while reducing unsprung weight and improving heat management compared to one-piece OE discs.

Vehicle Fitment

Mercedes-AMG A45 (W176) – Front
Mercedes-AMG CLA45 (C117) – Front
Mercedes-AMG GLA45 (X156) – Front

Lightweight, High-Flow Design

The curved-vane iron rings act as a centrifugal pump to pull air through the disc, while the reusable 6061-T6 aluminum hats and floating hardware maintain quiet street manners and race-ready thermal expansion control.

Features

Direct OE replacement; no modifications required
2-piece floating construction with reusable aluminum hats
High-carbon iron rings with curved internal vanes for cooling
Cadmium-plated high-strength drive pins with Belleville springs
Manufactured and assembled in Bellingham, WA
Sold/priced per pair

A1-310 FAQs

Will these work with factory pads? Yes — they’re compatible with OE and performance pad compounds.

Any noise from the floating hardware? Spring washers pre-load the pins to prevent rattles during street use.

Do I need new lines or brackets? No, these mount to stock hubs and calipers with OE hardware.

What rings replace these later? Use D1-310 front replacement rings.

Related Products

Reviews

The Ultimate Auto Racing Helmet Buyer's Guide

We’ve sold tens of thousands of helmets here at Competition Motorsport and, in the process of doing that, answered a million questions (probably) about them. With that in mind, this article will give you the real lowdown on selecting a proper auto racing helmet. We’ll go over the why’s and how’s of size, shape, certification, pricing, features, and maintenance so you have the tools you need to select the perfect helmet.

Learn More

Add to cart

Driver Gear

If you wear it to protect yourself while racing, the Competition Motorsport Driver Gear collection is where you'll find it!

Shop Driver Gear

Add to cart

Racecar Gear

If you mount it on or install it in your vehicle for track days or wheel-to-wheel racing, the Competition Motorsport Racecar Gear collection is where you'll find it!

Shop Racecar Gear