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Conference noted::bicycle

Title: Bicycling
Notice:Bicycling for Fun
Moderator:JAMIN::WASSER
Created:Mon Apr 14 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3214
Total number of notes:31946

3053.0. "Cantilever Brakes??" by PAR3::GLYNN (John) Fri Mar 15 1996 14:25

	I am in the market for new brakes for my Cannondale F600.
	I've already made a number of upgrades and feel the brakes
	are the only weak point left.

	The more expensive Cannondales are spec'ed with Onza H.O.
	cantilevers.  Has anyone had any experience with these?
	How do the Onza brakes compare to Shimano XTR, '95 XT or
	other after-market cantilevers?  I'm interested in ease of
	setup, brake feel (feathering?), and stopping power under
	panic conditions.   BTY - I have CODA 900 levers.

	Thanks for any comments you might have.

	/John

	
    
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3053.1Don't get carrier away.SEND::MCGOWANFri Mar 15 1996 15:4933
    
    I presume you have setup the brakes for optimum performance,
    
    (1) Point 1(L) is the point where the straddle cable meets
        with the left brake arm.  Point 1(R) is the point where
        the straddle cable meets with the right brake arm.
        Point 2 is the yoke (where the brake cable meets the
        straddle cable).  Point 3(L) is the point about which
        the left brake arm rotates.  Point 3(R) is the point
        about which the right brake arm rotates.
    
    (2) Line a(L) is the line through point 1(L) and point 2.
        Line b(L) is the line through point 3(L) and point 2.
    
        These lines should form an angle as close to 90 degrees
        as possible.  The same is true of line a(R) and a(L).
        This usually leaves point 2 very close to the tyre, its
        your call how much room you'll need here for mud clearance.
    
    See the brake blocks note for details of how to set up brake
    blocks and the kinds recommended by riders in the conference.
    
    If you still feel your brakes are the weak point, I can
    recommend LX and XT since I've used them.  Unlike the
    deraileurs though, XT has very little advantage over LX.
    I've yet to hear of XTR being recommended to anyone without
    sponsorship.
    
    Of course if you run GripShift, your choice if levers and
    brakes will be completely different.  I've never run
    GripShift and I don't think I ever will since I regularily
    change gears (sometimes front and back) and brake at the
    same time, unusual? I think not. 
3053.2got Alivios nowPAR3::GLYNNJohnFri Mar 15 1996 16:2314
    
    Thanks for the pointers.  I'm not totally dissatisfied with
    my braking performance currently, but the Alivio brakes
    that came with the bike aren't real strong.  I need to apply
    significantly more force to achieve lock-up than I did with
    XT brakes on my old bike.  I'm also getting uneven wear out 
    of my brake pads.  I think these are indications that there
    is excessive flex in the Alivio arms.
    
    BTY - the straddle cable I have is one of those idiot-proof
    set length cables, so I think my current setup is within
    reasonable limits.
    
    /John
3053.3Not a silver bullet though.ENQUE::MCGOWANFri Mar 15 1996 16:3711
    
    The idiot proof straddle cable just makes it easier to keep
    distance between point 2 and point 1(L) equal to the distance
    between and point 2 and point 1(R).
    
    Once this distance it set, the angles will match on both
    sides but the actual angle is related to the distance between
    point 2 and the tyre.  Moving this point towards the tyre
    will reduce the angle towards 90 degrees (in most cases).
    
    
3053.4V-BrakesFABSIX::JO_BARTERSun Mar 17 1996 00:1811
    John,
    
     The best brakes I've seen ever,as far as just rim crushing power,are the 
    new Shimano XT/XTR V brakes.You can get these for about $ 50. an end for
    the XT's.I don't know if they're just a passing fad.There is no
    modualation it's just on or off,but gawd they'll flip you on your face
    if you're not carefull.Just a thought.
    
                                          Later
                     
                                           J.B.
3053.5WMOIS::GIROUARD_CMon Mar 18 1996 06:052
    just curious, but what does frequently changing gears have to do with
    grip shift set-ups?
3053.6;>) of courseHERON::virenq.vbo.dec.com::HEMMINGSLanterne RougeMon Mar 18 1996 08:2010
>    Of course if you run GripShift, your choice if levers and
>    brakes will be completely different.  I've never run
>    GripShift and I don't think I ever will since I regularily
>    change gears (sometimes front and back) and brake at the
>    same time, unusual? I think not.

This man cannot be an American - I seem to remember something along the lines 
of marching and chewing gum at the same time ... 

3053.7Let me guess, you got Gripshifts?ENQUE::MCGOWANMon Mar 18 1996 09:015
    
    To change gears using GripShift you gotta twist, wrist goes up
    or wrist goes down.  This makes changing gears while braking
    rather difficult, don't you think?
    
3053.8no sense changing driveline over brakesEDSCLU::NICHOLSMon Mar 18 1996 09:1912
>                     -< Let me guess, you got Gripshifts? >-
>    To change gears using GripShift you gotta twist, wrist goes up
>    or wrist goes down.  This makes changing gears while braking
>    rather difficult, don't you think?
    

Got 'em, like 'em.  No major problems with shifting and braking.  I do agree
its easier to shift and brake simultaneously with Shimano, but I dont notice
any undo stress with my limitation.

.02
roger
3053.9WMOIS::GIROUARD_CMon Mar 18 1996 11:253
    agreed... one other point, if you find yourself doing this all the time
    you need to re-assess your riding technique because you're probably in
    the wrong gear a lot of the time or are not planning ahead enough.
3053.10BUSY::SLABOUNTYDon&#039;t like my p_n? 1-800-328-7448Mon Mar 18 1996 11:564
    
    	You can shift with your palm, thumb and 1st couple fingers, and
    	brake with your other 3 fingers, yes?
    
3053.11"i see" said the blind manENQUE::MCGOWANMon Mar 18 1996 12:2512
    
    Hmm... And there I was thinking Shimano was onto something.
    So people don't actually change gears and brake at the same
    time?  It sure sounded convincing.
    
    That changes things slightly.  Now you've got a whole slew
    of brake levers to choose from if you're not happy with
    your (now adjusted and ready to lock up immediately) brake
    setup, and...  I haven't got the slightest clue about any
    of them, so its over to you chappies with the GripShifts.
    
    
3053.12braking and shiftingFABSIX::S_ARCHAMBEAUMon Mar 18 1996 21:138
I've never really been in a situation where I'd want to brake and shift at the
same time.  I have to agree with Chip, you should probably reassess your riding
style and be prepared for life's little surprises if you find yourself braking
and shifting simultaneously on a frequent basis. Grip Shift is a good shifting
system and for powerful braking try the new Shimano V Brake.  For some more
money try Magura Hydraulics, I use these and have no complaints.

				- Shawn 
3053.13just another quick thoughtFABSIX::S_ARCHAMBEAUMon Mar 18 1996 21:282
If your shifting you must be pedaling.  Wouldn't pedaling and braking be a
contradiction?
3053.14WMOIS::GIROUARD_CTue Mar 19 1996 06:136
    -1 only if you expect it to go into another gear :-).
    
       I was in Goodale's Saturday (snooping with my brother-in-law). The
       guy said that the new V brakes are awesome. They do look cool.
    
       Chip
3053.15v brakesFABSIX::S_ARCHAMBEAUTue Mar 19 1996 07:044
Shimano had a demo bike at Mt Snow last year set up with the '96 XTR prototypes,
if they stop as good as they look then they'll probably be the best canti's out
there next to hydraulics
					-Shawn 8^)
3053.16STOWOA::SWFULLERTue Mar 19 1996 08:404
    Unfortunately these new V brakes need a lever that can move a lot of
    cable.  For us tandem people, this eliminates the use of this product.
    
    steve
3053.17WMOIS::GIROUARD_CTue Mar 19 1996 08:424
    i was playing with some models with these brakes and really didn't
    notice a lot of travel required over the regular cantys...
    
    i'll have to pay closer attention the next time i'm in a shop.
3053.18STOWOA::SWFULLERTue Mar 19 1996 08:444
    I believe the brake lever handles the extra cable travel, so if you
    are using after market levers it may feel different
    
    steve
3053.19Try this...ENQUE::MCGOWANTue Mar 19 1996 08:5610
    
    I don't do it every ride, however when I do, it's generally on a
    bitchin steep downhill, with a sharp graduation into a severe uphill.
    On the way down the hill you feather the back brake, because you're
    rolling you can turn the cranks without applying any force on the
    rear wheel, and you can now shift the back gear a few clicks, or
    even shift the front one if you need to, now you get to the bottom
    in gear and are ready to pedal as soon as whatever momentum you have
    dissipates.
    
3053.20I've done that!PCBUOA::aki1005.ako.dec.com::rehbergTue Mar 19 1996 13:166
I've done this with my grip shifters.  There may be better setup but this 
definitely works with grip shifters.  I think you have to try it to see if 
you will like it.

Rick

3053.21It's just not clicking with me.. ;^)ENQUE::MCGOWANTue Mar 19 1996 15:304
    
    You did? I honestly still have trouble envisoning it.  Maybe you're
    right and I should try it out, none of the guys I ride with use 'em
    though!  Oh well...
3053.22V Brakes offer little clearancePATE::SOLONTue Mar 19 1996 17:1812
         I was in a shop last week where they were building a Merlin with
    the Magura hydraulics.  I asked why not the v brakes and was told that
    the v brakes, because of the enormous leverage, require that they be
    held to 1/8" off the rim.  This, they found, clogged with mud and grit
    to readily.  The hydraulics have much more travel.
    
         FWIW, as a rank beginner, I too find myself going down hill with
    an immediate climb (usually with water at the bottom!) and downshift
    while braking and descending - even if I'm not pedaling.  It works for
    me... sometimes ;^)
    
    Tom
3053.23I love my Magura'sFABSIX::S_ARCHAMBEAUThu Mar 21 1996 07:131
    
3053.24V breaks are real niceLJSRV1::HAYDENTue Mar 26 1996 21:593
    I just got a bike with V brakes (XT).  They're great.  Really like
    them.  Dangerous to begin with - almost left the bike behind the first
    time I put them on going down my driveway.
3053.25What about easy of adjustment?MKOTS3::tcc050.mko.dec.com::larsonTue Apr 16 1996 10:5813
What about ease of set up?   I have XT's, vintage '95.   I can set them up 
perfectly, but every time I change my brake pads it takes me an hour to get 
it right.  There has to be a better way to adjust the pads than that 
conical washer set up.  Every time you do one adjustment, another one gets 
messed up.  

Anyone with experience with Onza, Avid, Machine Tech, Critical Racing, etc?

I would spend $100 for the most easy to set up brakes, I just want to make 
sure it's "better", and not just "different".

thanx,
Mike
3053.26EDSCLU::NICHOLSWed Apr 17 1996 14:388
Well, I can say that Dia Compe 987 are a PITA to set up, but work fine.  If
cost is a factor, these are way up the list.  Ease of setup knocks them quite
hard, however.

.02
--Roger

3053.27CONSLT::MCBRIDEIdleness, the holiday of foolsMon Sep 09 1996 16:197
    I just bought a bike with Avid SD 2.0 levers.  Problem is that there is
    no real information on how they work i.e. what the adjusters do. 
    Can anyone in here shed a little light on what the adjusting screws do?  
    
    Thanks,
    
    Brian