Let me start the question by saying that I have a pretty good impression of the advantages of disk brakes vs. V-brakes, so I'm not asking about performance comparisons.
I'm MTB-ing several thousand kilometers per year, and most of those are on the mountainside, where I have nice climbings, but also nice downhills (honestly I don't know which I like best). The thing is that I currently have a V-brake equipped bicycle, however for performance/safety reasons I'm strongly considering moving to hydraulic disk brakes.
But, on the other side, I also try to be as environmentally friendly as possible, this is why I rarely change the consumables of my bike, even if overly-used ones make it difficult to ride smoothly.
Before I switch to hydraulic disk brakes (I'm not currently taking into consideration the cable disc ones), I'd like to find out if they are more environmentally friendly than the V-brakes, or not.
- use some kind of hard rubber/plastic, not sure how degradable are the molecules that get ripped while braking
- they also wear out rims, from my experience I need to change them after 10.000km
- the cables don't degrade that easily (at least compared to the shifter ones), I currently use ones bought 20 years ago and they are still in 100% shape
- the cable housings also don't need to be changed often, I usually oil them and gain one more year of easy braking
- need an extra disk, which poses an initial environment impact
- the mineral oil should not have an environmental impact, right, as it's mineral
- the brake pads wear out after a while, I assume they are made of metal, so they should have a less environmental impact than the rubber/plastic from V-brakes
- the disk also wears out after a while, however, that's still metal, which should be recyclable
- zero impact on the rims!!!
Is my evaluation correct? Did I miss something?