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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
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4.2 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
Quick shipment, beautiful but slightly bent.
Color: Black
It's a beautiful piece, it was delivered sooner than expected which it is a plus the only thing I noticed after opening package, the top of the stand was slightly bent, I don't want to try to fix it because I'm afraid it may break. Overall it is very stable beautiful jewelry stand. Not too big and not too small. Perfect size.
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Reviewed in the United States on December 17, 2025
★★★★★ 5
Perfect
Color: Bronze
This is a great little ring & bracelet holder, exactly what I was looking for; elegant, small, and very VERY useful!!
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Reviewed in the United States on January 8, 2025
★★★★★ 5
Cute earring tree
Color: Silver
Got all my earrings out of a bowl! Easy to put together and seems sturdy.
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Reviewed in the United States on January 18, 2025
★★★★★ 5
Love my new jewelry tree
Color: Silver, Color: Silver
Love this tree to organize my jewelry. Easy to assemble and plenty of space for earrings and rings
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Reviewed in the United States on January 28, 2026
★★★★★ 5
Easy assembly
Color: Silver
Super easy assembly, one screw in tree trunk is unscrewed to place bowl and tree together - Phillips screwdriver needed. I bought the silver ring holder which perfectly suits my personality and decorative style. Can't tell you how wonderful it feels to finally have all of my rings off of my desk and stored in an easy to find place! Space saving is high on my list because I currently live in a 28' camper, so do not have my larger jewelry boxes in here with me. It only arrived today (7/28/2019) so this is with only a single days use, but am very pleased with the purchase and value for the ring holder - I was specifically looking for an inexpensive metal ring tree versus a plastic one.
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Reviewed in the United States on July 28, 2019