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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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4.6 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Enrichment toy is working
We have had these for a while. Got them for enrichment during the AZ summers when it is too hot to get outside. They are very durable. We do have to use cheese spray to fill them.
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Reviewed in the United States on May 19, 2026
★★★★★ 3
Not meant for small dogs.
I bought this toy ball hoping it would be a fun treat dispenser for my Shih Tzu, but it’s way too big for her to handle. The grooves are really deep, so treats just get stuck inside and she can’t get them out. The texture is also super slippery, so she has trouble keeping a grip on it, and the plastic is heavy and not flexible at all. Overall, not a great fit for small dogs.
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Reviewed in the United States on September 3, 2025
★★★★★ 5
The Real MVP!
These have been the Best Buy ever! Keeping the pups busy and cleaning their teeth for hours!! Super impressed with this company invention!
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Reviewed in the United States on April 20, 2026
★★★★★ 5
It'll only last a week
Size: 5 Inch, Color: Classic Bone, Size: 5 Inch, Color: Classic Bone
We've only had it a few days and she's already half way through it. It won't last the week. She doesn't eat it, she spits out the pieces. If you buy it was a consumable, totally worth the money. I'll probably buy my power chewer a couple a month
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Reviewed in the United States on December 13, 2025
★★★★★ 5
Good product
Size: 8 Inch, Color: Tree Branch
Dogs loved it. Good for keeping teeth clean
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Reviewed in the United States on May 30, 2026