You will see hydraulic rim brakes on lots of Euro eBIkes because they are the lowest maintenance (long service interval) while still giving great stopping power, albeit less than discs. So as your pads wear on low tech cable brakes, you need to adjust the cable around every 200 miles so the lever doesn't end up right at the handlebar, leaving you without brakes. Hydraulic brakes greatly increase the brakes squeezing power - they also require less frequent adjustments because the lever doesn't need to be pressed as far to close hydraulic brakes. Long term, depending on the conditions, after say 15,000 - 20,000 miles, any rim brake bike is going to need to have the wheel replaced or the wheel rebuilt with a new rim. This is because the rim brake pads will slowly shave the rim down, eventually making it so thin it needs to be replaced. The same is true of a disc brake's disc or rotor - but a rotor replacement is not such a big deal.
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