Advertise on Bikeforums.net



User Tag List

Results 1 to 18 of 18
  1. #1
    Senior Member
    Join Date
    Jul 2007
    Posts
    310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Disc Brakes - Hydro vs Mechanical

    The Gobike has Tektro (Ho or Io ?) mechanical discs, front and rear. They work well enough, but wondering what the relative advantages/disadvantages are compared to hydraulic. I noticed that Tektro only has hydros on their site, so maybe the cable ones are for OEM. I guess my main concern is whether pads are going to be a problem in the future.

    If hydros are preferred, any one brand/model better than another, and any to stay away from? Are the disc diameter and mounting bracket a factor?

    Thanks

  2. #2
    PatronSaintOfDiscBrakes dynaryder's Avatar
    Join Date
    Apr 2005
    Location
    dropped and lost in Washington DC
    Posts
    5,920
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Hydros have better feedback and require no adjusting. Once set up,you only replace the pads and bleed the system occasionally(about 2yrs for street bikes,more often for MTBs). I'd be concerned about using them on a folder because you would have to be very careful the lines were never pinched by the folding.

    How do you like the Gobike? Wish my Brompton had discs.

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Brompton S6L,Dahon Speed Pro TT

  3. #3
    Senior Member
    Join Date
    Jan 2011
    Location
    South Yorkshire, England.
    My Bikes
    Colnago CX-1 Record 11sp. Carbon Epic expert 29er, Claud Butler Dalesman. Proflex X-px Works, Cougar 653. KHS Montana Pro, Hercules Alassio. Ammoco Monte Carlo F/SS. Corratec Superbow Fun 29er. Claud Butler Midas. Kenisis T2. Peugeot Perthus.
    Posts
    245
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hydros are better/work better/stronger.
    Colnago CX-1 Record 11sp. Carbon Epic Expert 29er

  4. #4
    My legs hurt
    Join Date
    Apr 2008
    Location
    Farther behind you than I'd like to be
    My Bikes
    Bullitt, Brompton, '73 Schwinn Super Sport, Cresswell Fold-it, '81 Trek 610
    Posts
    647
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dynaryder View Post
    Hydros have better feedback and require no adjusting. Once set up,you only replace the pads and bleed the system occasionally(about 2yrs for street bikes,more often for MTBs). I'd be concerned about using them on a folder because you would have to be very careful the lines were never pinched by the folding.

    How do you like the Gobike? Wish my Brompton had discs.
    It can!

    (Sorry for the off-topic, but at least it shows that hydros are possible on a folder)
    http://www.kinetics-online.co.uk/blog/?p=267

  5. #5
    lowlife bottom feeder BassNotBass's Avatar
    Join Date
    Apr 2008
    Location
    Lou-evil, Canned-Turkey USA
    Posts
    1,851
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    IMHO hydraulics are unnecessary on a bicycle. Sure you don't have to adjust them but if they go bad (the master cylinders seem to be the biggest point of failure) it's an expensive fix. In fact the very small volume of a bicycle's hydraulic system makes it very sensitive to water contamination and the need to make the system as light as possible makes it relatively fragile when compared to say, a motorcycle's hydraulic system. Strong braking power and good feedback are not exclusive traits to hydraulics... cable actuated discs can be just as effective if designed/matched properly and set up by a good mechanic. However that last point is one major issue with all disc braking systems for bikes. It seems that not many bike mechanics know how to set them up, maintain them or adjust them properly. I've had my fair share of having to correct issues deemed "hopeless" or "the nature of the beast" by other mechanics.

    My MTB probably has the cheapest cable actuated disc brakes you can find yet I can controllably find my tire's limits of adhesion when at speed... I certainly don't think that hydraulics would serve me any better.
    I plan on living forever... so far so good.

  6. #6
    jur
    jur is offline
    Senior Member
    Join Date
    May 2005
    Posts
    6,183
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    While hydro is a plus for real downhill and MTBing, I also do not see the need to ditch the cables for folder riding. Having discs avoids rim wear, but even there, judicious use of brakes can enormously reduce that problem.
    My folding bike photo essays www.dekter.net/

  7. #7
    Senior Member
    Join Date
    Aug 2005
    Location
    San Rafael, California
    Posts
    1,514
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I agree with BNB's post .. I wouldn't retrofit hydraulic brakes if my cable actuated ones worked (assuming you can get replacement parts) .. I have a '76 Honda CB 200 road bike with factory cable operated disc.. it has always worked very well.. a common upgrade for the CB200 was to swap in a hydraulic kit.. I never considered it .. for a folding bike, I'd prefer cable because of the possible contortions the cable/line might have to go through.

    Clownbike, I've had a repair shop in Marin for the last 38 years...

  8. #8
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    621
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    I have Avid BB7 cable discs on my bike friday pocket Llama, 160 discs..

    definitely have to be careful, they grab quick , at low speeds..

    supposedly IRD dual banger pinches the disc, between 2 moving pads,

    rather than push the disc with one pad into the other..

    curious if it makes a significant difference in grabby ness..

  9. #9
    Senior Member
    Join Date
    Jul 2007
    Posts
    310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks all -

    Will stick with the current setup and see how it goes. Maybe pick up a couple sets of pads for spares.

    The Tektros work well. 30+ years of motorbikes has gotten me well used to disc brakes and two wheels. Seems that with the single sided design, wheel to caliper adjustment is more critical than a double sided pot. Will check into the IRD as single sided deflects the disc, and this will increase as the pads wear.

    One thing I particularly like about disc brakes is once you get a nice wheel build, you don't have to worry about brake pad wear requiring a new rim.

  10. #10
    Senior Member
    Join Date
    Jul 2007
    Posts
    310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dynaryder View Post
    How do you like the Gobike? Wish my Brompton had discs.
    Too soon to tell. It's rather heavy, but seems to have several options for weight reduction. It rides very nice, and once you get the fold figured out is about the same as a Birdy in that regard. Will see what can be done about the weight, but so far the Birdy rides about the same and is much lighter and folds more compactly. Unfortunately they seemed to have gone for cheaper components to bring it into a price point. I guess they had difficulties recouping the R&D and frame fabbing costs. Not unusual for small companies like that. By the time they get to market, not enough resources to do proper advertising and distribution.

    The Go is a marvelous bit of industrial design. Will be interesting to see if it can be made more practical as well.

  11. #11
    jur
    jur is offline
    Senior Member
    Join Date
    May 2005
    Posts
    6,183
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    This thread needs Go-bike pron...
    My folding bike photo essays www.dekter.net/

  12. #12
    lowlife bottom feeder BassNotBass's Avatar
    Join Date
    Apr 2008
    Location
    Lou-evil, Canned-Turkey USA
    Posts
    1,851
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BruceMetras View Post
    I agree with BNB's post .. I wouldn't retrofit hydraulic brakes if my cable actuated ones worked (assuming you can get replacement parts) .. I have a '76 Honda CB 200 road bike with factory cable operated disc.. it has always worked very well.. a common upgrade for the CB200 was to swap in a hydraulic kit.. I never considered it ...
    Usually people would swap out the cable operated drums or discs for hydraulic discs... supposedly for reasons of better performance. The problem was that they didn't know how to set up a cable actuated drum or disc brake properly, that's why it wasn't performing up to par. My CB175 with CB350 cable/drum could outbrake any other bike near it's class... even dual disc hydraulic equipped bikes.
    http://www.jz63.com/XS650/images/175_1.jpg
    I plan on living forever... so far so good.

  13. #13
    lowlife bottom feeder BassNotBass's Avatar
    Join Date
    Apr 2008
    Location
    Lou-evil, Canned-Turkey USA
    Posts
    1,851
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Clownbike View Post
    ... Seems that with the single sided design, wheel to caliper adjustment is more critical than a double sided pot...
    +1.
    Of course the logical fix is to design a floating caliper. That would benefit both hydraulic and cable systems but it would most likely also add weight.
    I plan on living forever... so far so good.

  14. #14
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    621
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    Hydraulics with 2 pistons coming in from both sides of a disc are easy to balance,
    you just have a common oil pressure source.

    My Magura rim brakes have an obvious hose. though 1 pad touches the rim earlier

    than the other, but does not exert force until the other pad is also in contact,
    then they work together., equally.

  15. #15
    PatronSaintOfDiscBrakes dynaryder's Avatar
    Join Date
    Apr 2005
    Location
    dropped and lost in Washington DC
    Posts
    5,920
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bendembroski View Post
    it can!

    (sorry for the off-topic, but at least it shows that hydros are possible on a folder)
    http://www.kinetics-online.co.uk/blog/?p=267
    do want

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Brompton S6L,Dahon Speed Pro TT

  16. #16
    Senior Member
    Join Date
    Jul 2007
    Posts
    310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jur View Post
    This thread needs Go-bike pron...
    Will get some pics up when I get a chance.

  17. #17
    Senior Member
    Join Date
    Jul 2007
    Posts
    310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jur View Post
    This thread needs Go-bike pron...
    Hi Jur - Here ya go.
    Attached Images Attached Images

  18. #18
    jur
    jur is offline
    Senior Member
    Join Date
    May 2005
    Posts
    6,183
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    My folding bike photo essays www.dekter.net/

Posting Permissions

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