Australian researchers have found that tire wear and tear is a major contributor to urban waterway pollution, producing particulate matter that includes microplastics. But, they also found that there are effective ways of reducing this type of pollution, which can affect the health of the…
I haven’t changed them on my road or mountain bike yet, and I’ve had them for 4 and 6 years respectively
Then your brakes probably don’t matter. As other pointed out, wear follows a quartic law, so 1/10th the weight per axle means roughly 1/10000th the waste. Not exactly sure how things like ground contact area per axle or or tire pressure affect it.