[RBW] The Mysteries of Bike Assembly

2013-10-12 Thread Perry
Some excellent points. Regarding the cable splitters...

> In contrast the male end holds the cable with two set screws, but the entry 
> hole in the brake connect is much smaller than the exit hole and, to my eye, 
> just barely distinguishable from the derailler connect.  

I have davinci cable splitters and find no problem distinguishing between brake 
and derailleur easily. Not sure that the brand would make any difference but 
just throwing it out as a data point.

Regarding 50+ year old eyesight, I'm 55. This is my main problem working on 
bikes. This and diminished dexterty of my hands/fingers and loss of general 
flexibility (to bend and hold my body in certain situations while making 
repairs). For the flexibly part, I find myself moving the bike on the stand 
more often to get the best angle at the job. Good readers that don't slide down 
my nose and this http://www.lightsandknives.com/images/D/hl4.jpg are the best 
I've been able to come up with for the eyesight thing. I remain open to 
suggestions.

Also, as noted, I strongly suspect that a brake cable will not be be flexible 
enough to give optimal shifting performance. This may be most noticeable around 
tight bends such as under the BB cable guide to front derailleur. Also, could 
be that this is more of an issue with indexed shifting. I realize these 
standards were established prior to indexed shifting so maybe I'm wrong about 
the reason but I've done some experiments and the stiffness of a thick cable 
does appear to effect shifting IME.

• Perry

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[RBW] The Mysteries of Bike Assembly

2013-10-11 Thread Michael Hechmer
Since retiring I found that my Trek 620 commuter wasn't seeing much use, 
and after I bought a Saluki on this list I pretty much stopped riding it 
all together. I tried selling it but no one made me a decent offer and I 
liked the ride too much to just give it away.  When someone offered a good 
set of NOS 650B wheels I decided to go ahead with a long standing plan to 
convert this bike and add S&S couplers to the frame.  Had to move the canti 
studs, added DT studs and had it powdercoated, all by Bilenkey.  Pictures 
here: https://www.icloud.com/photostream/#A2GgZLKuGQYuu6   Sorry about the 
fuzziness but I find it very difficult to hold an iphone steady enough to 
take decent pictures.  Other than the wheels, all the parts are stuff I had 
on hand.

Anyway, every time I put a bike together I find myself wondering about why 
some things are so much harder than they have to be and why the bike 
industry hasn't made any attempt to ease the process.  Don't get me started 
on the bright idea of putting one chainring bolt in backwards! Cables 
puzzle me the most.  First, threading cable into aero brake levers.  If 
your light isn't perfect, or your eyes are over 50, or you're working with 
a used cable that has the slightest bend in it, you will struggle.  Why not 
make the entry point funnel shaped, or the anchor slotted, or removable, or 
even make the top of the lever housing removable?  How hard would that be? 
 Second given how much the industry has worked to reduce inventory (steeply 
sloping TT & ahead stems for example) why do we still have two cable sizes 
with two different size housing, two different ends, two different caps and 
crimps?  I understand that brake cables need to be stronger than derailler 
cables do, but derailler cables don't need to be weaker.  In 35 years of 
riding the only cable I have ever broken has been a rear derailler.  I was 
a long way from home and would have been much happier with a stronger 
derailler cable as there were a lot of hills for me to negotiate on a 
single speed bike!  This time the cable disconnects created another 
complication.  If you haven't used these, the female end of the connectors 
house a cable end.  But that end is sized to work perfectly with derailler 
cable.  The brake cable end needs to be filed down in order to fit loosely 
enough to allow the part to turn.  This is in spite of the fact that they 
made the brake cable hole a tad larger.  In contrast the male end holds the 
cable with two set screws, but the entry hole in the brake connect is much 
smaller than the exit hole and, to my eye, just barely distinguishable from 
the derailler connect.  I think I spent half the time on this job playing 
with cables!

Now I'm going to take it on a shake down ride, then disassemble, pack it in 
a suitcase and fly to Oakland on Tuesday.

Michael

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