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Description
GSPORT Birdcage RimLightweight Structure At first glance the Birdcage looks like a fairly conventional aero style rim, but there is more to it than that. The first clue comes from the name; birds have hollow bones to save weight whilst retaining as much strength as possible, and the Birdcage rim has a hollow bead for the same reason. The rims hollow bead is still big and chunky to help reduce the chances of pinch puncturing or flat spotting the rim, but by creating a
Lightweight Structure - At first glance the Birdcage looks like a fairly conventional “aero” style rim, but there is more to it than that. The first clue comes from the name; birds have hollow bones to save weight whilst retaining as much strength as possible, and the Birdcage rim has a hollow bead for the same reason. The rim’s hollow bead is still big and chunky to help reduce the chances of pinch puncturing or flat spotting the rim, but by creating a tiny hollow cavity inside it, GSport was able to to keep the weight down and make the Birdcage their lightest rim available.
Cross-Lacing Strength - The next innovation was to adapt GSport's cross-lacing design to the narrow inner wall of the rim. GSport managed to squeeze a few extra millimeters of spoke offset out of the design to help increase lateral wheel strength, and by carefully tailoring the rim’s cross-section, they managed to match all the angles to the nipple so that the walls of the rim section act like the ribs inside the Ribcage rim, which helps to support the spoke nipples as much as possible.
Re‑designed Valve Core - Traditionally, the greatest flaw in “aero” rims has been the valve hole. “Aero” rims position a lot of very efficiently utilized mass in the base of the rim to support the spokes and give the rim good strength, then a huge hole is drilled through it for the valve stem and a massive weak-spot is created. With the Birdcage, they've offset the valve hole so that this section can retain its strength. A handy side-effect of this is that fitting a pump is now more convenient.
Easy tire installation and brake pad compatible - Aside from these original features, GSport spent a lot of time “sweating the small stuff”. They've ensured that the deep center allows for easy tire removal and fitting, and we’ve made sure that the sidewalls, while slimmed down, are still suitable for brake use.
Most high tech rim to date - The end result is one of the most high tech rims to date. With a weight of just 440g it outperforms most rims weighing 20-30% more, and the weight saving from the rotational mass of the wheel feels fantastic.
Specifications
Drillings: 36 hole
Weight: 440g
Width: 34mm
Height: 21mm
ERD: 383mm
U.S. Patent 7,427,112
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.2 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Excelente calidad
Color: Black, Size: Standard - 4 Panel
Excelente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
★★★★★ 5
Great value, perfect for our infant room!
Color: Black, Size: Standard - 4 Panel
Great product, sturdy design and easy to build! It is a fairly light weight item, which aids in the maneuverability of the divider. The color was as described and is dark enough to block the light from our sleeping infants! I do love that you are able to see through the slats and see the child sleeping- if you are looking for something with MORE privacy, this is not it. It has great coverage area and is dark and a wonderful value for the price, however, you are able to see through the areas where each panel connects!
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Reviewed in the United States on August 18, 2025
★★★★★ 1
Don’t waste your money or time!
Color: White, Size: Standard - 4 Panel
Don’t waste your money. The instructions make no sense and the metal poles are either sized wrong for the product or screw holes are incorrectly placed, but no two poles matched in size and placement making it impossible to put this together without the panels being warped. No matter how I tried to switch the poles to see if I had them wrong, they always turned out warped and incorrectly fit. I finally gave up and threw everything out - I wasted $50 on this junk and because I didn’t try to put it together immediately after I bought it, it is way too late for a refund. Lesson learned!
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Reviewed in the United States on October 1, 2025
★★★★★ 3
Sturdiness
Color: Black, Size: Standard - 4 Panel
Not so sturdy. It worked well for its intended job, but, it has to be secured to the floor for long term use.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Hide my hot water heater
Color: Grey, Size: Standard - 4 Panel
I used the divider to hide my hot water heater. It's perfect and looks great
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Reviewed in the United States on April 21, 2026
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