Old 08-17-18 | 09:48 AM
  #9  
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elcruxio
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Joined: Jul 2011
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From: Turku, Finland, Europe

Bikes: 2011 Specialized crux comp, 2013 Specialized Rockhopper Pro

Well, as I've stated many times I have both as I have an LHT frame with a disc trucker fork. I'm a little on the fence whether I'd like to get a full disc system but if I could do it for free I'd swap for full disc in a heartbeat. But I'd also not go hydraulic for maintenance and security reasons.

I don't think bending discs is as big of a deal as one might think, even though they do take some more care. When using lowrider front rack the disc is completely protected by the lowrider itself. The rear is protected by the frame. When traveling or flying if one is worried about the rotors bending in the wheels one could always just take them off the wheel. Remounting rotors isn't a big deal.

In my personal experience discs are easier to deal with than rim brakes. Avid BB7's are almost set and forget. Occasionally adjust the pad adjusters and swap pads when necessary. With my current rear brake (avid shorty ultimate) swapping pads is a nightmare and takes usually from 2 to 5 hours to do properly. There is a pretty big design flaw in these brakes that makes using kool stop pads very difficult... Also they have spontaneously started squealing like no disc brake can even achieve and in the process much of the power is gone. Weird that.

For longevity and maintenance reasons I think discs also win. No wear on rims meaning longer wheel life especially if one needs to ride in the rain. I use the front disc almost exclusively when braking so my rear rim is still in very good condition. Still, there is some noticeable wear after three years of active all year riding.

There is one down side to disc brakes and that is heat capacity. It's not a deal breaker but it is something that needs to be accounted for. When traveling heavy the rotor size should increase accordingly. I use a 203mm rotor when I tour because it has a lot of capacity and power but I have managed to cook it nonetheless once or twice. With rim brakes of course there's the same consideration but one just needs to be mindful of braking technique. Though with mechanical discs the results of a cookoff are just that you lose some braking power and you need to re bed in your pads since they have been glazed over. With rim brakes overheating risks the tube and can cause a blowout or a melting failure of the pads.
But both are only really issues if doing really intense alpine descents etc. When going flat, doesn't really matter.
But that's also one point into the disc brake's counter. You can modify braking power by swapping the rotor size / pads. With rims only pads really make a difference. There are some exotic rim options, but rims are expensive, rotors are cheap.

With tire sizing it's pretty obvious discs win. They simply do not care about tires. With rims it is much more of an issue.
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