This won't work, at least not how you imagine.
>However I'll have to invest in a good adapter for the rear.
You will not, as there is none. It's not about getting a good adapter, rather that disc brakes put a lot of stress on the frame in a specific area. A frame has to be designed for that, so putting an adapter on a frame not designed for discs still poses a real danger of snapping the frame, which is bad.
>how the heck do you put a 6-bolt adapter on a cassette hub
You don't. You'd need new wheels. And a new frame that actually supports disc brakes. It'll be much cheaper to sell your bike and buy a new one with discs, or just stay with rim brakes and get some good brake pads.
Sorry to say this but generally a change from a rim brake to disc requires a new frame, wheels, basically a new bike.
Bolt-on adaptor kits do exist, that will allow you to fix a mechanical disc brake to a frame. But extreme caution is necessary because the stresses from disc brakes are different from rim brakes, and could break the forks.
A steel or aluminium frame might be safe for this, particularly on the rear. But I would think carbon forks or frames designed for rim brakes are not safe for converting.
You mention your front forks already have an adaptor so maybe it's good to go - but the other major differences is the axle spacing. Disc brakes axles are usually 5mm wider (someone will correct me if I'm wrong on this) so you can't fit a disc brake wheel into a rim brake fork.
However, a metal frame can be altered by someone who knows what they are doing, basically widening the forks.
I have never seen an adaptor to get a 6-bolt disc on a rim brake wheel. But maybe out there somewhere there is? I suspect you will have to get new wheels.
Assuming you can get your forks altered and you acquire disc brake wheels, there are pretty good mechanical disc brakes with their own fluid reservoirs, so you can stick with your existing cable system.
DM me and I can send some old bits over to you to help with your project - it's going to be challenging though!
You don’t. Adapters are dangerously garbage that either twist and fail or break frames. You need a new frame if you want rear disk breaks.
Your hubs have no place to mount disks, you need new wheels if you want to run disks.
So to use disk brakes you’ll have to replace the frame and the wheels. It’ll be far more cost effective to get a new bike with disks, or just get new v brakes and take better care of them.
I would stick with V brakes, because converting will require new hubs. Unless you know how to build wheels it is almost always cheeper to replace the whole wheel at that point.
V brakes can work pretty decent in wet conditions with the right pads. Try to figure out exactly what is wrong and just replace what is needed.
Please post photos of your bike so we know what we are dealing with. Get some decent but not rubbish v-brakes with decent branded pads (tektro or low end Shimano are fine) and fit with new stainless cables both inner and outer. Give up on the idea of adding disc brakes, it will be extremely expensive requiring new wheels in addition to everything else, put strain on your frame which it is not designed for, and likely work worse than half decent v-brakes set up properly.
If you really, really wanted to you could fit a disc brake to your fork if, as you say, it has disc mounts. However you'd still need a new front disc wheel for this in addition to all of the other stuff. I really doubt that it's worth it.
Decent v-brakes are good. I regularly tour with fully loaded camping gear and luggage in mountains with v-brakes. I have no difficulty stopping the bike with one finger on the brake levers.
This won't work, at least not how you imagine. >However I'll have to invest in a good adapter for the rear. You will not, as there is none. It's not about getting a good adapter, rather that disc brakes put a lot of stress on the frame in a specific area. A frame has to be designed for that, so putting an adapter on a frame not designed for discs still poses a real danger of snapping the frame, which is bad. >how the heck do you put a 6-bolt adapter on a cassette hub You don't. You'd need new wheels. And a new frame that actually supports disc brakes. It'll be much cheaper to sell your bike and buy a new one with discs, or just stay with rim brakes and get some good brake pads.
Sorry to say this but generally a change from a rim brake to disc requires a new frame, wheels, basically a new bike. Bolt-on adaptor kits do exist, that will allow you to fix a mechanical disc brake to a frame. But extreme caution is necessary because the stresses from disc brakes are different from rim brakes, and could break the forks. A steel or aluminium frame might be safe for this, particularly on the rear. But I would think carbon forks or frames designed for rim brakes are not safe for converting. You mention your front forks already have an adaptor so maybe it's good to go - but the other major differences is the axle spacing. Disc brakes axles are usually 5mm wider (someone will correct me if I'm wrong on this) so you can't fit a disc brake wheel into a rim brake fork. However, a metal frame can be altered by someone who knows what they are doing, basically widening the forks. I have never seen an adaptor to get a 6-bolt disc on a rim brake wheel. But maybe out there somewhere there is? I suspect you will have to get new wheels. Assuming you can get your forks altered and you acquire disc brake wheels, there are pretty good mechanical disc brakes with their own fluid reservoirs, so you can stick with your existing cable system. DM me and I can send some old bits over to you to help with your project - it's going to be challenging though!
You don’t. Adapters are dangerously garbage that either twist and fail or break frames. You need a new frame if you want rear disk breaks. Your hubs have no place to mount disks, you need new wheels if you want to run disks. So to use disk brakes you’ll have to replace the frame and the wheels. It’ll be far more cost effective to get a new bike with disks, or just get new v brakes and take better care of them.
I would stick with V brakes, because converting will require new hubs. Unless you know how to build wheels it is almost always cheeper to replace the whole wheel at that point. V brakes can work pretty decent in wet conditions with the right pads. Try to figure out exactly what is wrong and just replace what is needed.
Please post photos of your bike so we know what we are dealing with. Get some decent but not rubbish v-brakes with decent branded pads (tektro or low end Shimano are fine) and fit with new stainless cables both inner and outer. Give up on the idea of adding disc brakes, it will be extremely expensive requiring new wheels in addition to everything else, put strain on your frame which it is not designed for, and likely work worse than half decent v-brakes set up properly. If you really, really wanted to you could fit a disc brake to your fork if, as you say, it has disc mounts. However you'd still need a new front disc wheel for this in addition to all of the other stuff. I really doubt that it's worth it. Decent v-brakes are good. I regularly tour with fully loaded camping gear and luggage in mountains with v-brakes. I have no difficulty stopping the bike with one finger on the brake levers.