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Good Tutorials on 105 Shifter Installation

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Good Tutorials on 105 Shifter Installation

Old 05-19-16, 09:33 AM
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illusiumd
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Good Tutorials on 105 Shifter Installation

Hi I was wondering if anyone had good video tutorials for installing 105 shifters and derailleurs? I'm good on crankset - but I'm new to setting up shifters.

I've got a cool mech at an LBS who said he'd charge me 50 to install - if I had everything "sort of installed" - just as a backup - but I'd like to try and do it myself
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Old 05-19-16, 09:49 AM
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I rarely use video tutorials. It's hard to do a good job with these.

I always start with Park Tool repair guides.

A repair stand makes derailleur adjustments way easier. It's hard to do the adjustments upside down, with the bike sitting on the bars and saddle.

I like doing my own install, I can get the cables just the right length, and trim the derailleurs until they are perfect.

Shimano Dealer Manuals
See the Shimano Dealer Manual pdfs, too. These are easy to follow. (you want the red icon "DM" not the user guides. It looks like the 105 DM manuals are separate pdfs for each component. Keep them, you'll use them in the future.)


Cutting the shifter and brake cables
Park tool link

Make sure you know which piece of housing in the kit is for the front or back shifter, and which are for the front and back brakes.

I mount the shifters and sit on the bike in a doorway to try different locations for the shifters on the bar. Then either eyeball the shift lever angles until they are even, or sometimes measure from the end of the bar drops along the outside curve.

The ends of the brake and shift housings need to be cut off straight. I put one of the pre-cut ends into the shifter, without the inside cable. Press it in all the way! Now roughly tape it to the bars, and hold up the cable housing to where it attaches to the frame. Use a small piece of tape to mark the cut point. I'll cut it a little long, and trim the end a little more later, once all the housings are in place. It's hard for me to get the length correct the first time, and I don't want it to be too short.

The spiral brake housing will usually get mangled on the end, so I grind until it's flat and smooth.

I think most shifters don't need end caps on the housing, the caps are for the frame end of the housing.

The cable housing cutters are critical to doing this easily. They are fairly expensive, but you'll use them again next time you replace cables. I find it tedious to use a file to straighten the end of the housing cut. A dremel tool with a grinding wheel is much better--and I dip the end of the housing in a jar of water to keep it cool while grinding. Dremels are handy to have around the house, anyway.

Derailleur adjustment
Park tool link. Follow each step to do it correctly.
Same with the front derailleur.

You'll need some crimp ends. Get a small bag at the local bike store. The housing cutter has a crimper built in.

Last edited by rm -rf; 05-19-16 at 10:11 AM.
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Old 05-19-16, 10:27 AM
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johnny99
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I use the Shimano instructions
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Old 05-19-16, 11:00 AM
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I've had very good luck dialing in the limit screws and shift adjustments by doing it without a chain attached. With a chain on there is much more movement and pull on the derailleur that can mask minor needed adjustments. With the chain off its much easier to tell where the limits should be set and the cable tension should be adjusted. Then you put the chain on and it's usually a quarter turn or two of the cable adjusters to get it perfect.
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Old 05-19-16, 11:01 AM
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+1 on the Park Tool adjustment procedures. Just make sure to complete each step correctly before proceeding and don't try to cut corners by skipping or hurrying. Make the adjustments gradually; 1/8 turn or less may make the difference between perfect and so-so.
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Old 05-19-16, 01:53 PM
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Originally Posted by dsbrantjr View Post
+1 on the Park Tool adjustment procedures. Just make sure to complete each step correctly before proceeding and don't try to cut corners by skipping or hurrying. Make the adjustments gradually; 1/8 turn or less may make the difference between perfect and so-so.
Thanks all!
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