Thread: New Sora 3500?
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Old 10-09-13 | 04:57 AM
  #5  
Norrick
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Joined: May 2013
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Originally Posted by period3
Brake cable pull. TRP CX9 have 90mm arms and work best with the new cable pull ratio on most of the shimano shifters (5700, 6700, etc. -- just not sure about sora/tiagra).

Some mention of it here: http://www.bikeradar.com/forums/view...107&p=18385697 . You can also see that e.g. competitive cyclist does not recommend ultegra 6700 be used with older brakes because of the new pull ratio: http://www.competitivecyclist.com/sh...ontrol-shifter

If the Sora 3500 hasn't been updated to the new pull ratio, then I'll have to set the brake pads very close to the rim.
I have these. I bought them for my medium reach shimano caliper brakes (non-series). They felt like they were too difficult to grab, somewhat like putting a v brake lever on caliper brake. So I i got the idea to try it out on my flat bar road bike which actually does have V-brakes:
]

the fact that it has "road v-brakes" is purely coincidental (measured at 90mm arm length), when I started modifying that bike the brakes were the first thing I bought and I was just randomly searching parts with the word "road" in it, not knowing anything about bikes for the most part. I learned alot, but burned through a lot of money in the process. Anyway, it turns out the combination between the levers and v-brakes are a perfect match. I have read that the cable pull for higher end 2013 models are increased, but I can only assume that this is also true for the 3500 series because these work very, very well. Theres about 2mm (have not measured but its enough that if you're wheels are decently trued you'll have no problems) of clearance on either side of the rim to the pads, you will need an adjustable barrel on the brake line somewhere to remove the wheel easily (quick detatch in my case).



I'm basing these observations on a comparison I made with a pair of microshift dual control brifters, which, when coupled to the very same v-brakes, were bottoming out by the time i had any substantial braking force and were pretty much touching the rims when not in use. I assume these brakes use standard cable length pull which was in use prior to these 2013 brifters.

Now if you are using standard caliper brakes I am not sure how these will feel, the only calipers I used had extended reach arms and they felt too stiff. Its possible that the shorter reach might feel better.

Last edited by Norrick; 10-09-13 at 05:06 AM.
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