>>1809727$50-80 or whatever an Avid BB7 or Tektro Spyre costs in your local currency.
>>1809835With most rim brakes there's so much flex in the brake caliper itself that addressing the minor flex in the cable path doesn't make much difference.
>>1809842First, yes, if the gears aren't turning your derailers won't shift because unless rotation is happening there's no space for the chain to move. And second, in addition to the video the other anon shared, keep in mind that when you shift, you're pulling with cable in one direction and letting a spring do the work when cable is released in the other - that's why your shifters work in different directions.
>>1809881Like any big company that produces a range of products, they make some really good tires and a bunch of average ones.
>>1809990Look closely, you can see 4 cracks propagating from the spoke hole. Your rim isn't going to explode tomorrow unless the spoke tension is way off, but those cracks are going to get worse over time and eventually the rim will burst while you're riding it.