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
CYCLES
Size
20INCH
Width
34mm
Colour
Chrome
Additional Information
(ERD) 383mm / U.S. Patent: 7,427,112 / Height: 21mm
Weight
440g
Customers
have up to 30 days to return an unused / unopened item(s) for a full refund,
less delivery fees. After the 30 days, you will be required to pay a 10%
restocking fee. If more than 60 days has passed we will not accept returns. If an
item(s) has been wrongfully sent or has a manufacturing fault, we will cover
the return shipping costs and arrange a replacement or a refund. Return
shipping costs or postage refunds will not be covered if the error is made by
the customer, these include but are not limited to: ·Incorrect style ·Incorrect brand ·Incorrect quantity ·Incorrect colour (IMPORTANT:
Different computer screens & mobile devices may show different shades of
colour) ·Incorrect size (We always say "measure
twice order once). ·You entered the incorrect address on your order · (Note:
please always triple check the address on your order, this is most important
for international customers). If you need
to return an item, please contact us via the Support Centre. By signing
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conditions and thus agree to all of the above terms and conditions. WARRANTY INFORMATION ·All items listed are covered by a warranty. ·All items sold are warranted to be free from any
defects ·A proof of purchase is required to make a
warranty claim. ·Claims can be processed by visiting out Support
Centre ·A warranty of an item does not cover physical
damage or self-inflicted damage, misuse of an item ·A warranty does not cover wear and tear of an
item
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-80x80.jpg "GSPORT Birdcage 20'' Rim Chrome")
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