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trek 1220 refurbish project...

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trek 1220 refurbish project...

Old 09-15-13, 04:05 PM
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e0richt
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trek 1220 refurbish project...

hi,
I have a trek 1220 touring bike that has a broken st-1053 integrated brake/shifter...
my derailer: rx100

I found these online and want to know if they will work as replacements

- st-2303 sti shifter - 8 speed
- sl-bs50-8 speed bar end shifter (can be index or friction)

if they would both work any recommendations as to which to use?

thanks!
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Old 09-15-13, 09:18 PM
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Assuming that your trek was an 8 speed to begin with then, YES the two shifters will serve the rest of the gear system. The actuation ratio should be the same. But the grade and the manor of the two shifters is quite different. I would think this would be a MAJOR decision factor. Andy.
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Old 09-16-13, 08:13 AM
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- st-2303 sti shifter - 8 speed

still not sure about this one as I don't know if its 105 compatible... any info?
I have a set but they seem a bit on the cheap side in terms of construction.

- sl-bs50-8 speed bar end shifter (can be index or friction)

this one will only work in friction mode.... it is for dura-ace and that seems to be
incompatible with 105 components... actually would need sl-bs64-8 from what I have found on my research...
and I would want indexed shifting...
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Old 09-16-13, 09:19 AM
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These will work and should feel nicer to you than the Sora levers: http://www.probikekit.com/bicycle-ge.../10828678.html

Another nice option are these older 8 speed units: http://www.bikesomewhere.com/Shimano...FQyk4AodkHoAbA

8 speed Dura Ace, as far as I know, was one of those oddball Shimano grouposets that only works with itself.
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Old 09-16-13, 12:57 PM
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joejack... thanks!
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Old 09-16-13, 05:29 PM
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Yes, I forgot about the first generation of DA having it's own cable pull spec. BTW it also was designed to use the thicker gear cables (1.6mm?) then the current 1.2mm ones. Andy.
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Old 09-16-13, 06:31 PM
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Originally Posted by Andrew R Stewart View Post
Yes, I forgot about the first generation of DA having it's own cable pull spec. BTW it also was designed to use the thicker gear cables (1.6mm?) then the current 1.2mm ones. Andy.
I wonder what the justification was for the thicker gear cables. Anyone know? Seems counter to the usual "cut weight at almost all costs" of the Dura Ace groupset.
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Old 09-16-13, 06:50 PM
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Originally Posted by joejack951 View Post
I wonder what the justification was for the thicker gear cables. Anyone know? Seems counter to the usual "cut weight at almost all costs" of the Dura Ace groupset.
The use of the traditional thick gear cables was due to this tradition. The cables were already in the mainstream, no backlash to "weaker" cables was created, and remember that there was no skinny cables yet in use.

What is so hard for many to understand is that with no awareness of different choices there is no concerns about change. So with the first DA index generation there was no president set. No other options except the decades of friction before (excluding the minor low end Positron and ST efforts). Riders knew no other but thick gear cables. to see a skinny one would (and did a few years later) bring into question their sturdiness. back then a gear cable was expected to go for years/thousands of miles. Not the season or two of current SS/1.2mm cables.

Weights were already coming down with fewer spokes, narrower tires, lighter frame tubes. So cables weren't yet on that radar screen. BTW when the 1.2mm cables came onto the market it was their less friction that was stated as the main reason. Andy.
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Old 09-19-13, 11:14 AM
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Andrew... just wanted to say thanks!
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