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What is the point of the adjusters at the down tube bosses?(6 posts)

What is the point of the adjusters at the down tube bosses?DY
Oct 6, 2003 5:10 PM
The last several frames I have had all used Ergoshifters and the cables went into the bosses on the down tube.

Why are these adjustable with the thumb knob and spring? Are they a necessity? I've never used them (just set them to the middle) The only thing I can figure is that they are used for fine tuning while riding if a derailleur goes out of tune....

I don't know if they are necessary with Shimano or not.

Seems like I'd rather just have a cable stop like the brake cable stop on my top tube....
re: What is the point of the adjusters at the down tube bosses?russw19
Oct 6, 2003 5:33 PM
That's the exact reason they are there. If your shifting isn't perfect, you can make it so without getting off the bike. If you don't need them, be happy that your shifting is working right and leave it at that. Some newer frames don't have the shift bosses anymore, but have a cable stop like you mentioned at the head tube. The problem is that you can't mount a downtube shifter to those frames if you want to make a lighter climbing bike.

Russ
Do you want perfect shifting?Kerry Irons
Oct 6, 2003 5:53 PM
I've found that things can work just fine on the work stand but be just a tad off when actually riding down the road. I can get things perfect by using the barrel adjusters.
re: What is the point of the adjusters at the down tube bosses?bimini
Oct 7, 2003 6:33 AM
I use mine when I change wheels. I have to give the rear one a couple of quarter turns to get the shifting just right. I also find that I need to make minor 1 or 2 click adjustments with big changes of temperature.

I like the ability to tweek in the rear while riding. I never need to touch the front.
re: What is the point of the adjusters at the down tube bosses?Gripfer
Oct 7, 2003 9:24 AM
I have a Cannondale R 1000 with just the cable stops and there is no adjustment for the FD except where the cable attaches! What a pain.
re: INline adjustersale-x-x
Oct 7, 2003 10:03 AM
You can get inline adjusters. It's barrel and cable end that fits into you first run of shift cable housing (cut in half of course) and allows you to do all the things that the attached ones allow you. As well, in terms of the front shifter, the adjusters allow for a precise setting of the high and low end trim (keeps your front gorilla from scraping the chainrings)