Advertise on Bikeforums.net



User Tag List

Results 1 to 9 of 9
  1. #1
    Junior Member
    Join Date
    Aug 2012
    Location
    Voskresensk, Russia
    My Bikes
    http://www.bikeforums.net/showthread.php/922698-My-4-th-lugged-frame
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Columbus fork blades and disk brakes

    Hi,

    Did anybody make fork with Columbus 28/19-12.5 Cromor/Zona blades and mechanical disk brake? Will it be strong enough?
    Last edited by Koldun; 12-25-13 at 02:20 PM.

  2. #2
    Andrew R Stewart Andrew R Stewart's Avatar
    Join Date
    Feb 2012
    Location
    Rochester, NY
    My Bikes
    Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder
    Posts
    3,127
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I haven't but have read of many forks built for road bikes (and Avid BB7s). Most seem to say that the forks are too light/flexi for disk brakes. Seen a few shots of unraked blades. Maybe two posts said all went well for them. the general consensus is that "standard" road blades are too light weight/skinny. Running a stiffener gusset up the backside of the blade from the caliper mounts helps to distribute the stress to a portion of the blade with a larger section. Andy.

  3. #3
    Member
    Join Date
    Feb 2013
    Posts
    45
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I make lots - but for 16" wheels. If it was for larger wheels, I'd keep the blades straight and use the Paragon extended disc mount or something similar, but only really for road use.
    http://www.kinetics-online.co.uk

  4. #4
    tuz
    tuz is offline
    Senior Member
    Join Date
    Dec 2006
    Location
    Toronto/Montréal
    My Bikes
    Homemade mixte, track, commuter and road, Ryffranck road
    Posts
    1,138
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've sure some people have done it but I wouldn't; the disk acts on the weak, small diameter part of the blade. Basically in an emergency stop the torque from braking is wheel radius times your weight, and I usually use less torque to rake the blades in the first place. Some people have had success using a long brazed reaction arm like Andy suggested.
    homebuilt commuter, mixte, road and track (+ Ryffranck road)
    bla bla blog

  5. #5
    Have bike, will travel Barrettscv's Avatar
    Join Date
    Feb 2006
    Location
    Windy City
    My Bikes
    A road bike for every purpose
    Posts
    8,966
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    I have a CROMOR fork on a Cyclocross bike with cantilever brakes. Stopping with cantilever brakes is poor due to fork flex. Disc brakes would compound the problem.
    2014 Trek DS.1: "Viaggiatore" A do-it-all bike that is waiting in Italy
    2012 Pedal Force CG2: "Secolo Bicicletta" the modern carbon fiber road bike
    2012 Pedal Force CX2: "Carbone CX" the carbon fiber CX bike
    2010 Origin 8 CX 700: "Servizio Grave" Monstercross/29er bike
    1997 Simoncini Special Cyclocross: "Little Simon" lugged Columbus steel CX bike
    1987 Serotta Nova Special X: "Azzurri" The retro Columbus SPX steel road bike

  6. #6
    Junior Member
    Join Date
    Aug 2012
    Location
    Voskresensk, Russia
    My Bikes
    http://www.bikeforums.net/showthread.php/922698-My-4-th-lugged-frame
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks!

    I think, http://www.cycle-frames.com/bicycle-...rk-Blade-.html is the only way.

  7. #7
    Senior Member
    Join Date
    Sep 2012
    Posts
    1,486
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Koldun View Post
    OP; The ones you are asking about will flop around a lot and will likely unwind in use fairly soon. That will result in a frightful final ride.

    +10 Diddo's on Koldun's input. The Nova blades are up to the task at the cost of only a few extra ounces total. Nova also sells tandem strength ones if you need even more grunt (just search for Tandem in their search box to find their fork crown and blades intended for that level of duty)

    /K

  8. #8
    Junior Member
    Join Date
    Aug 2012
    Location
    Voskresensk, Russia
    My Bikes
    http://www.bikeforums.net/showthread.php/922698-My-4-th-lugged-frame
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have contacted with Adriana from Columbus and she replied my, that they had used Columbus Cromor fork blades on their Cinelli Supercorsa disk brake prototype. She told, it's no problem to use disk brake with curved blades.
    I think, I'll try to make Cromor curved fork with a very long caliper mount.
    Here is Cinelli:
    396310_10150518977457364_56278627363_8483156_326191685_n.jpg429112_10150523127792364_56278627363_8492746_83100584_n.jpgCinelli-prototype-disc-brake-cyclocross-bike01.jpg

  9. #9
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    40,203
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Thorn in UK has a statement on disc mounts, they will only consider straight blades..

    might go a bit thicker tube wall on the brake side.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •