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Disc Brakes; Yay or Nay?

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Disc Brakes; Yay or Nay?

Old 08-18-18, 08:30 AM
  #101  
Maelochs
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Originally Posted by rydabent View Post
Give proof a disc has killed anyone. I suggest this is here say fake news.
Dude .... if you couldn't see the sarcasm dripping off this post, you are too old for a bike and belong on a recumbent.
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Old 08-18-18, 08:33 AM
  #102  
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Originally Posted by rydabent View Post
On steep long down grades discs wont over heat the rims and cause a tire to blow out.
I have actually seen this happen on TV in races ..... but only I think twice in a few decades. On the other hand, I can't open my newspaper each morning with seeing two or three stories about disc brakes running amok and killing their spouses and families.


(The news paper bit was especially for you, Mr. Rydabent---i figure you and I are the only ones old enough to remember what a "newspaper" is.)
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Old 08-18-18, 08:44 AM
  #103  
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i ride steel rim with caliper in rain and i can stop just fine. just have to adjust your riding style. if anything it make me safer bec i am alittle scare, which is a good thing.
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Old 08-18-18, 08:52 AM
  #104  
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Originally Posted by TiHabanero View Post
The shop I work in handles both Scott and Cannondale. Both are very good frames, however I prefer the Synapse as I like the fit. As for disc brakes, if you can't go for the much more expensive models, I don't recommend them as they are almost always a disappointment in performance and rarely out-perform a standard rim brake. My daughter has the Synapse Tiagra and sticks with me just fine and easily modulates speed on descents and can panic stop without trouble. In wet weather just give a few rotations to wipe off the rim with the pads and you will stop, not as quickly as a disc brake, but you will stop. Been riding them all my life and never had trouble stopping in time in wet weather, even when loaded with touring equipment.

One thing to add, how often does one ;purposely go out in the rain or get caught unwittingly in the rain? Get real, it is not very often, if ever.
Unless you you live in New England, or the PNW or anywhere else with regular rain. AZ and CA may need not apply. I commute year round and don't postpone my schedules bike packing trips because of weather.
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Old 08-18-18, 08:56 AM
  #105  
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Originally Posted by Trevtassie View Post
When disc brakes fail through heat build up from heavy braking, they fail to a mode of not working. With the exception of carbon rims, rim brakes don't fail from heavy braking. When heavily loaded, going down big hills you do have to think about what is happening with discs and heat. You don't with rim brakes. I still like my discs and I'm not taking them off my bike, but they are only on there because I scored them cheap as part of a package deal.
Never had discs fail, mech or hydro. Big man here with loaded bikepacking rigs too.
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Old 08-18-18, 09:04 AM
  #106  
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I can only think of 2 advantages of disc brakes:

- much better stopping in winter where ice/snow build up on rims can make rim brakes almost useless and road salt/grit on the roads wear out your rims in one season and...

- if you do a lot of downhill mountain biking

If you don't do the type of riding described above, then rim brakes is all you will ever need. A properly adjusted rim brakes with good quality pads will stop just as good as disc brakes.
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Old 08-18-18, 09:50 AM
  #107  
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my bike with studded tires , an old MTB has wheels with drum brake hubs..
it is a 3rd choice..
1) they retrofit on a rim brake frame without brazing on new mounts.
[ I built these wheels, 25+ years ago ]

2) They modulate smoothly , My disc brake bike is far too easy to stop too abruptly.. Not something I would consider good, on black ice..

3) big brake shoes won't need replacing .. if at all , during your lifetime..

maybe downside, A) heavier, B) only 1 company left making them ..

and, C) as mature technology, & very rarely on any new bike ,

so no 'latest/greatest, ever' revues ..







....

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Old 08-18-18, 12:22 PM
  #108  
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If you have a frame that accommodate > 28mm tires (and plan on using that capability) then I say disks are a good idea. Also, if you are determined to use carbon wheels.

I'm a big rider and have stopped on steep slopes thousands of times just fine with calipers. About the only advantage I see from disks is that I wouldn't worry the same way about overheating my rims (and potentially blowing up a tire) descending a long technical road on a hot day.

However, disks IMO need a fair amount of maintenance. I remember from TV sports events of my youth ads for Wilkerson steel razor blades which would show two finely honed swords being drawn against each other at the commercial's conclusion. For decades I hadn't thought about this aural memory until I began hearing my disk's brake pads rubbing against the rotors--same metallic clang. Unfortunately one can't open up the calipers a little wider like on a rim brake to make the sound go away. It's the most frequent adjustment I have to make on a stand with my disks.

I like my disk bike--the brakes are very good. However, I like my calipers fine also. I wouldn't pay extra for disks on a road bike where I'm going to use 28mm and narrower tires.
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Old 08-18-18, 03:02 PM
  #109  
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Originally Posted by wolfchild View Post
I can only think of 2 advantages of disc brakes:

- much better stopping in winter where ice/snow build up on rims can make rim brakes almost useless and road salt/grit on the roads wear out your rims in one season and...

- if you do a lot of downhill mountain biking

If you don't do the type of riding described above, then rim brakes is all you will ever need. A properly adjusted rim brakes with good quality pads will stop just as good as disc brakes.
I may go further and say that maybe only the first point is a reason. Iíve mountain biked for years, with plenty of long descents (>2000 vertical feet), and never felt I needed more than cantilevers or v-brakes. I always had plenty of stopping power with properly set up rim brakes.
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Old 08-18-18, 06:23 PM
  #110  
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Originally Posted by Leebo View Post
Never had discs fail, mech or hydro. Big man here with loaded bikepacking rigs too.
I have, big man here with full touring rig, bike and gear over 110lbs. Going down a very steep mountain sealed road with random patches of gravel that meant you couldn't pulse brake or go fast enough for air flow to be effective. I've also been riding with a dude who had one fail on his MTB, luckily it was the back. Funny thing was he was talking not 5 minutes before about how superior disc brakes are.
Here's the point: discs do have a failure mode to zero or minimal braking from heat build up, in circumstances which can be achieved in the real world. Braking techniques in steep terrain while heavily loaded need to be modified to take this into account. To say otherwise is to deny basic physics. Rim brakes can cause blow outs in extreme circumstances from heat build up but cases of the brake failing to stop are much rarer than with disc brakes.
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Old 08-18-18, 07:05 PM
  #111  
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Rim brakes please.

Although I do have hydro discs on one of my bikes, discs merely present another hassle that I would rather not deal with. Dishing of the front wheel, more dishing or the rear wheel, bleeding of lines, another thingy to align correctly...bleh. I'm a year round commuter and see rain, snow, ice, salt what have you and rim brakes are perfectly adequate.

If you're in need of that instantaneous bite for emergency braking that hydro discs offer in rain, snow, ice etc I'd say you're already going too fast for conditions anyways and are asking for some hurting either way.
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Old 08-18-18, 07:20 PM
  #112  
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Well ... i think we have made it clear to the OP that no matter what he chooses ... someone here is going to tell him he's doing it wrong.
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Old 08-18-18, 07:52 PM
  #113  
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No right or wrong. Preference determines choice.
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Old 08-19-18, 08:58 AM
  #114  
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Originally Posted by Maelochs View Post
I have actually seen this happen on TV in races ..... but only I think twice in a few decades. On the other hand, I can't open my newspaper each morning with seeing two or three stories about disc brakes running amok and killing their spouses and families.


(The news paper bit was especially for you, Mr. Rydabent---i figure you and I are the only ones old enough to remember what a "newspaper" is.)
Yup I remember newspapers. But-------------I no longer subscribe because of the price of the local paper.
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Old 08-19-18, 09:00 AM
  #115  
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Originally Posted by cthenn View Post
Disc brakes are spinning saw blades, and have killed people. Then again, with rim brakes if you get one drop of water on the rims, you will be unable to stop and will careen into oncoming traffic. Disc brakes have way better modulation, whereas with rim brakes once you press the lever, your wheels will lock up and you will endo. Disc brakes take a degree in astrophysics in order to adjust or change the pads, whereas rim brakes can be adjusted by a trained monkey. Wheels with rim brakes are easier to swap, for the next time you race in the Tour de France, whereas if you have a disc wheel, there is exactly one wheel the pads will work with, and anything else will not fit.

I think that about cover the pros and cons. The choice is yours.
Saw blades**********? Killed people********************?? Where is the proof in those statements.
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Old 08-19-18, 09:37 AM
  #116  
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Just the other day i saw on the news where a disc attacked and killed a mother and an infant in a stroller ... diced them into tiny pieces ... but the disc tried to escape on a bike with rim brakes, and a single drop of blood hit the wheel, so the disc couldn't stop and crashed fatally.
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Old 08-19-18, 10:17 AM
  #117  
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Originally Posted by Maelochs View Post
Just the other day i saw on the news where a disc attacked and killed a mother and an infant in a stroller ... diced them into tiny pieces ... but the disc tried to escape on a bike with rim brakes, and a single drop of blood hit the wheel, so the disc couldn't stop and crashed fatally.
Well there you go.
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Old 08-19-18, 09:52 PM
  #118  
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Originally Posted by Maelochs View Post
Dude .... if you couldn't see the sarcasm dripping off this post, you are too old for a bike and belong on a recumbent.
I am on a recumbent trike and it has disc brakes.
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Old 08-19-18, 10:38 PM
  #119  
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Originally Posted by rydabent View Post
I am on a recumbent trike and it has disc brakes.
Justice is served.
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Old 08-20-18, 07:09 AM
  #120  
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Originally Posted by Trevtassie View Post
I have, big man here with full touring rig, bike and gear over 110lbs. Going down a very steep mountain sealed road with random patches of gravel that meant you couldn't pulse brake or go fast enough for air flow to be effective. I've also been riding with a dude who had one fail on his MTB, luckily it was the back. Funny thing was he was talking not 5 minutes before about how superior disc brakes are.
Here's the point: discs do have a failure mode to zero or minimal braking from heat build up, in circumstances which can be achieved in the real world. Braking techniques in steep terrain while heavily loaded need to be modified to take this into account. To say otherwise is to deny basic physics. Rim brakes can cause blow outs in extreme circumstances from heat build up but cases of the brake failing to stop are much rarer than with disc brakes.
YRMV. I'm a big fan of Avid BB7 mt setups, run them on 4 bikes. 180 mm rotor front, 160 rear, sintered pads. Never had an issue, ever. But that's me. Pulsing and alternating brakes works. Sure stuff breaks. Hydro hoses I guess? Mt biker here. They just work great, standard issue for say the last 6 years or so, mt bikes over say 1 K don't have the ability to run rim, and plus and fat bikes run disc always. Cheers, pedal on.
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Old 08-20-18, 07:42 AM
  #121  
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I notice everypart of a bike is smooth with round corners. The disc is the sharpest part of a bicycle. I imagine it could fillet flesh if the conditions are right.
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Old 08-20-18, 07:44 AM
  #122  
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Tell that to anyone who's ever had the end of a handlebar pulled out of their leg after a crash.

Also, the things with the teeth are the sharpest things on a bicycle.
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Old 08-20-18, 10:47 AM
  #123  
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Originally Posted by mtb_addict View Post
I notice everypart of a bike is smooth with round corners. The disc is the sharpest part of a bicycle. I imagine it could fillet flesh if the conditions are right.
How about the teeth on the big ring on the bottom bracket. BTW disc brakes now have a rounded edge.
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Old 08-20-18, 11:23 AM
  #124  
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Originally Posted by rydabent View Post
How about the teeth on the big ring on the bottom bracket. BTW disc brakes now have a rounded edge.
That was my first thought as well. You could also get impaled on one of the tubes "if the conditions are right."
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Old 08-20-18, 11:33 AM
  #125  
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I can't wait to hear the discussion once carbon rotors for bikes becomes in vogue.

"I used to get brake fade with my disc brakes but not with these new carbon rotors!"
"Spinning, assploding, saw blades of death!"
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