In my Overhaul Class, I like to give students a mechanical model for what happens when you mismatch brakes and levers. I usually draw something like the diagram below and talk about the trade-offs.
~matt
We exclusively teach the third above method, i.e. distance between stop and pivot. It goes over pretty much instantly. The thornier part is to get participants to remember which caliper/arm type each lever goes with.
cyclista Nicholas
On 2018-03-09 21:36, Ron Kellis wrote:
Thank you!. Shaking my head over why the Park article didn't come up in my
search. Limitations of the Google most popular link type search and a true
vertical search.
Appreciate the details!
Ron
On Fri, Mar 9, 2018 at 8:02 AM, David Oliver <nowhere3@gmail.com> wrote:
There are three ways that I teach people how to identify the difference.
First is the obvious one that if it says V-Brake on the brake, it's long
pull.
Second is that if you look at most flat bar brake levers there are two
holes, or at least an indent where a second hole could be, where the part
that the head of the cable can go into is (the silver bit in this photo:
https://www.parktool.com/assets/img/repairhelp/housingU_005. ). If it'sjpg
in the top hole, then it's long pull. If it's in the bottom hole then it's
short pull. There are sometimes a little "C" and a little "V" next to those
holes/indent that make it even easier.
If that second one doesn't make sense, I can get a photo later today and
send it to you.
Third is by measuring the distance from the pivot point to where the head
of the cable goes. Park Tool says that it is 21mm for short pull:
https://www.parktool.com/assets/img/repairhelp/ta-flatbar- andconv.jpg
42mm for long pull: https://www.parktool.com/assets/img/repairhelp/ta-
linearpull.jpg
In practice for the third method I tell people to measure with a ruler the
distance and if it's less than 30mm then it's short pull, if it's more than
35mm then it's long pull and if it's hard to tell or somewhere inbetween
then it's hard to tell without testing it.
On Fri, Mar 9, 2018 at 7:25 AM, Ron Kellis <ron.kellis@velocitycoop.org>
wrote:
<https://maps.google.com/?q=21Salvaged brake handles are rarely kept with the calipers. Anyone have a
reasonably reliable method for identifying long pull vs. short pull handles?
TIA
Ron
--
Ron Kellis | Véloteer & Basic Maintenance Instructor | VéloCity Bicycle
Co-op | 2111 Mt. Vernon Ave., Alexandria, VA 2230111+Mt.+Vernon+Ave .,+Alexandria,+VA+%C2%A022301&entry=gmail& source=g>
| velocitycoop.org | +1 (703) 549-1108
____________________________________
The ThinkTank mailing List
Unsubscribe from this list here: http://lists.bikecollectives.o
rg/options.cgi/thethinktank-bikecollectives.org
____________________________________
The ThinkTank mailing List
Unsubscribe from this list here:
http://lists.bikecollectives.org/options.cgi/thethinktank-bi kecollectives.org
____________________________________
The ThinkTank mailing List
Unsubscribe from this list here: http://lists.bikecollectives.org/options.cgi/thethinktank-bi kecollectives.org