Actually, yes all the Thule Rapid Aero (Which these are) accessories are direct fit for these. I have two Echelon Bike trays and that fit perfectly! They even have the spot on the foot where the Thule "deal" is supposed to be applied. The lock mechanism and everything is 100% the same. It's nothing new really, Chinese factories sell non-branded items on the eBay Market all the time, this particular eBay vendor has sold over 10,000 pairs so far and when you order a 40' container worth of them, you get a price ;-) . They feel rock solid after several months of use. I have some pictures but they are full res. I need to resize them. PM me and I can send them to you.

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2006 X5 4.8is Titanium Silver / Black (36K miles)
Dinan Cold Air Intake, Software, Exhaust
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1996 M3 Sedan Artic Silver / Dove Grey (65K miles)
Dinan Stage III Super Charger, Software, Throttle Body
Short springs on Koni Gas Adjustable
Borla Exhaust