When Are Disc Brakes Necessary?

Discuss light weight issues concerning road bikes & parts.
CAAD8FRED
Posts: 76
Joined: Mon Jun 18, 2018 10:52 pm

by CAAD8FRED

What situation would you say calls for discs over rims?

rajMAN
Posts: 160
Joined: Wed Mar 17, 2010 4:20 pm
Location: UK

by rajMAN

Personally, when touring with a heavy load in a mountainous region or commuting 5 days a week in a crap wet climate(UK) on crap road surfaces. As I do neither I have not the necessity. No other situations I could think of. :D

by Weenie


Geoff
Posts: 5194
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Tandems? They are pretty nice for 'cross, too.

modcon
Posts: 6
Joined: Sat Apr 07, 2018 8:32 am

by modcon

I live near a mountainous area, riding year round and commuting on the same bike, often training on the way. The rain and grit through winter usually means wearing out rims in a season. So discs were a fairly obvious upgrade, happy with them so far after 3000km.

Sent from my SM-G930F using Tapatalk


Hexsense
Posts: 595
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

rain ride with cheap carbon rims without proper brake track.

MoPho
Posts: 461
Joined: Sun Jul 10, 2011 7:48 pm
Location: NorCal/SoCal

by MoPho

Disc are better in all situations :thumbup:


In what situation would you say calls for starting another stupid disc brake vs rim brake thread? :roll:



.

ome rodriguez
Posts: 350
Joined: Fri Feb 24, 2006 9:16 am

by ome rodriguez

When they no longer make rim brakes.

C36
Posts: 403
Joined: Fri Mar 03, 2017 3:24 am

by C36

You have very clear cases that may not be concerning many of the people here: loaded bikes (tandem, or touring), people who don’t feel comfortable in descents or want a better comfort (squeezing brakes for long slow descents is painful).
Other quite clear cases are people insisting (or just have one pair) in using carbon tube type wheels in terrible weather conditions in hilly roads. Or people in the business of only going Downhill, full speed in geostorm condition .


Envoyé de mon iPhone en utilisant Tapatalk

alcatraz
Posts: 1345
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Disc brakes are more comfortable, safer and more consistent.

That being said you don't _need_ them if you use good rims and good brake calipers. If you happen to weigh 100+kg you can easily take the weight penalty of running alloy brake track rims which with good pads and calipers can stop on a dime. Yes the rim will get some damage over time. Be ready to have to replace the front rim after a longer distance that is inversely proportional to the weight of bike+rider and number of rain rides.

/a

User avatar
Beaver
Posts: 509
Joined: Wed Aug 18, 2004 6:06 pm
Location: Lower Saxony - Germany

by Beaver

Next Tour Mag. issue features a disc vs. rim brake (aluminium only :( ) comparison, I am curious for the results. :D

smartyiak
Posts: 53
Joined: Fri Jul 29, 2011 5:20 pm

by smartyiak

Apparently: when buying a new aero bike.

I'm only half-kidding.

User avatar
Calnago
Posts: 6743
Joined: Sun Nov 07, 2010 9:14 pm

by Calnago

Hmmm... so when are disc brakes really necessary...
Image
Colnago C64 - The Naked Build; Colnago C60 - PR99; Trek Koppenberg - Where Emonda and Domane Meet;
Unlinked Builds (searchable): Colnago C59 - 5 Years Later; Trek Emonda SL Campagnolo SR; Special Colnago EPQ

Bordcla
Posts: 200
Joined: Wed Dec 20, 2017 3:42 pm

by Bordcla

Whenever a scenario comes up where you think you might use your brakes more than gently or very little in less than perfect road conditions or on steep or long descents (wet and/or sandy/dirty) and you don't feel like wearing away a set of expensive rims.

User avatar
indrek
Shop Owner / Manufacturer
Posts: 88
Joined: Mon Aug 01, 2005 10:24 am
Contact:

by indrek

Have been riding on Campaq H11 disc brakes for 3 months now (both in alps and flat places). But just finished an Etape on my old bike with EE rim brakes and chinese carbon tubulars. Had zero issues and was mostly passing others on downhills (unfortunately not uphill :D ). Felt stable, safe and no overheating problems what so ever. My disc bike has campaq bora carbon wheels. I was sold on disc's when I built my first disc road bike and took it for a ride, but now when back on light wheels and good old rim brakes I'm in between. When the weather is good, and you are not a complete novice on a road bike then there is nothing left to be desired with a good set of rim brakes, even on a hilly ride... When the wether turns worse or you don't want to "think" while going downhill, then yes, disc brakes are the way to go. For my friends, buying a new bike, I'd suggest go with discs. For fellow weenies on tubs, I'd suggest stay with your rim brakes and wait for a year or two to upgrade...

RussellS
Posts: 800
Joined: Wed Feb 03, 2010 1:31 am

by RussellS

smartyiak wrote:
Mon Jul 09, 2018 2:36 pm
Apparently: when buying a new aero bike.
I'm only half-kidding.
It is only Half kidding. Looking at all the new aero bikes announced recently, I think only the Madone gives you a rim brake option. All others, Cannondale and Soecialized, only give disc option. I watched a YouTube video talking about this point. And the presenter said with aero bikes you are running brake and gear cables in tight spots to keep them hidden and making abrupt bends in all the cables. So mechanical doesn't really work if you want to keep everything concealed and aero. Electronic shifting and hydraulic brakes don't care about bends. If you want your cables to go through the bars and into the stem and then down the fork or into the toptube and/or downtube. Lot of abrupt sharp angles going from bars to inside stem and then down fork. Too sharp for steel cables. Bike companies don't want to make two Venge or SystemSix frames where one has external cable stops and routing, and the other has all internal cabling. Custom frame makers give you the option of internal or external routing. Big bike makers don't let you decide where you want the cables.

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post