CORKY X suits riders who already wear cycling sunglasses and want a rear-view accessory away from the handlebar. THE BEAM identifies this as the left-side version and lists compatibility from 8 mm arm thickness, so measure the arm and check where the mirror would sit before ordering. Its housing is listed as adjustable through 360 degrees; the useful reflection will still depend on your eyewear position and riding posture. Treat it as an additional glance point, not a substitute for awareness around traffic.
Where it fits.
What stands out
- The glasses-arm mount avoids using handlebar-end space for the mirror.
- The mirror housing is adjustable through 360 degrees according to THE BEAM.
- The official page lists black, white and yellow color variants.
Before you buy
- THE BEAM labels this the left-side version and does not specify a paired set in the listing.
- THE BEAM lists eyewear-arm compatibility from 8 mm thickness, but the page does not document every frame shape or clearance.
- The listing does not give mirror-surface dimensions or establish the view from your own glasses and riding position.
The useful details.
Manufacturer specifications checked October 31, 2026. Specifications can vary by configuration.
| Selected option | Black, variant 39412261093470, SKU BEAM-BM0023-RETR |
|---|---|
| Mount | Attaches to eyewear; left-side version only (manufacturer-listed) |
| Eyewear compatibility | Sunglasses arms from 8 mm thickness (manufacturer-listed) |
| Adjustment | 360-degree rotation (manufacturer-listed) |
| Mirror material | Acrylic PC mirror (manufacturer-listed) |
| Price and listing status | €49.00 including tax; exact Black variant marked available in the France storefront on October 31, 2026 |
Source: THE BEAM product page ↗.
Move the mirror off the handlebar
CORKY X attaches to an eyewear arm, which gives riders who use cycling sunglasses a way to add a rear-view mirror without choosing a bar-end mount. That placement is the main reason to consider it. If you prefer a mirror attached to the bike or ride without glasses, compare a handlebar-mounted option instead; CORKY X is built around the eyewear you wear on the ride.
Check the side and eyewear fit first
THE BEAM describes this as the left-side version and lists compatibility with sunglasses arms from 8 mm thick. Measure the part of your frame where the mirror would attach, then check that the mount can sit securely without interfering with your usual fit. The product page does not list full frame-shape limits or mirror dimensions, so it cannot establish a clear view for every pair of glasses.
Keep the listed price separate from the partner code
On October 31, 2026, the France storefront listed the selected Black variant at €49.00 including tax and the official product feed marked it available. Bike Tested's owner-supplied partner record lists code SEBASTIAN for 5% off. No after-code amount is shown.
Your questions, answered.
Who should consider the THE BEAM CORKY X?
It is aimed at cyclists who wear sunglasses and want a mirror attached to the eyewear rather than the handlebar. Check the frame fit and left-side orientation before choosing it; the useful view depends on where it sits on your glasses and how you ride.
Will CORKY X fit my sunglasses?
THE BEAM lists compatibility with eyewear arms from 8 mm thickness. Its page does not document every arm shape or clearance, so compare the mounting area on your glasses with the product instructions before ordering.
Is this a pair of mirrors?
THE BEAM labels CORKY X as the version for the left side only; the listing does not specify a two-mirror set. Confirm the package contents with the store if you need mirrors for both sides.
Does code SEBASTIAN apply to the Black variant?
SEBASTIAN gives 5% off at THE BEAM. No after-code price or checkout result is claimed.
What is the discount code for the THE BEAM CORKY X Sunglasses Rear-View Mirror?
Yes. Use SEBASTIAN for 5% off at thebeamofficial.com.
Keep exploring.
- Compare a flat-bar, bar-end mirror if you prefer mounting the rear view to the bike instead of your sunglasses. THE BEAM CORKY URBAN Flat-Bar Rearview Bike Mirror: review →
- The everyday commuter gear checklist
- Explore Gear & tech →
- THE BEAM brand directory
- THE BEAM offer details