There is a difference between cargo/kg of rubber tire. On your bike youre not carrying an external metal framework, liquid resirvoirs filled with liquids, air conditioning units, filters, fans, belts, double inaulated doors etc.

You can make the logical leap that the amount of rubber waste generated per person is likely different in different vehicle types. Cars vs busses, vs personal bikes. And a smart bet would be less per person on a bike vs car, considering both the weight and physical differences - e.g. speed, momentum and required force against the tires to accelerate and stop.