Is this brake cable installed right?
 

This is my first build with disc brakes. The frame has the rear brake cable outlet on the inside of the chainstay (pictured) and the best way of connecting the cable housing to the caliper is routing it underneath the chainstay (pictured). Is this how it belongs, or are there calipers better designed for inside outlets? The brakes are mechanical. Thanks.
https://cimg6.ibsrv.net/gimg/bikefor...98ad5a2249.jpg
https://cimg7.ibsrv.net/gimg/bikefor...0468831cc9.jpg

Although the routing looks tortured, it doesn’t look like the cable could run any other way. Going over the top of the chainstay would kink the cable even more.

What is the bike in question?

that looks like a front caliper - rotate it 90 degrees clockwise, picture it attached to the left fork and the cable routing sort of makes sense

The bike in question is an Elves Falath Pro Disc

that's what I was thinking
might be on to something

Different Elves, but this shows a caliper with much better routing - https://cimg4.ibsrv.net/gimg/bikefor...08729dc31d.png

It looks to me like these calipers are designed for external routing or full housing brake cable routing. I think this frame would work better with hydraulic brakes and hose routing.

Seems to me the frame was designed to work with a different caliper.

Yeah, a different caliper is needed.....one with the cable insert on the inside. I'll search for one.

It looks like a hard pass frame for me. Looks expensive from a long distance but get close and you notice they spent little time on R+D which is how they get it so low in price.I would go with hydraulics and hopefully that solves it or skip the frame entirely and find something designed with better routing, that is pretty atrocious.

There is only one El Vez and he is the Mexican Elvis!

That looks like the less bad option, but it's not great. Have you checked to see how much the cable drags?
Other calipers have the cable stop more towards the inside, you might want to spend a while looking for one that would let the cable run inside the stay.

I have ordered these....
https://cimg9.ibsrv.net/gimg/bikefor...8a061f36b7.jpg

I have an ignorant question, having no experience with disc brakes. Is that a cable-operated caliper, or is it hydraulic? If the latter, why does the tortuous path matter?

It’s the former, says so above.

I couldn't see the cable. Looking again, I see the place where the cable is supposed to be clamped. Thanks!

It is a mechanical (cable operated) caliper.

Thanks. I don't have any experience with disc brakes, but I didn't see the inner cable. On second (third, fourth) look, I saw the attachment point.
Well, based on what I know about other cable-actuated components... that's quite a severe bend. Luckily, it's the rear brake! ;)

that's a front flat mount caliper, that got slapped on the rear mounts.

While Shimano does seem to make a front and rear caliper, I can’t see any difference between them other than the adapter plate.

https://cimg9.ibsrv.net/gimg/bikefor...252bfbe79.jpeg

The rear would have the same cable routing as we see in hardknox1’s pictures. The Spyres will probably be a better routing.

https://cimg0.ibsrv.net/gimg/bikefor...778635cf3.jpeg

This bike seems to have a dip in the stay just before the brake, which isn't helping matters. But this is your serving suggestion:

https://cimg9.ibsrv.net/gimg/bikefor...41899b125.jpeg
Note the silver noodle and the adapter. The noodle comes with the caliper from Shimano.

The amount of effort you're putting into blaming a completely normally routed frame just for the 'sin' of not costing enough is impressive.

About 12 minutes into it they install the brakes. Looks like you'll need a different setup.

Modern road frames aren't made for cable-actuated disc brakes, are they?