Rear Derailleur cable installation
Rear Derailleur cable installation
Begin with installing handlebar spacers. This doesn’t have to be a perfect fit height at this time, we just want to get the handlebars in the ballpark position. I installed 3-4 inches worth of spacers.
Temporarily snug the stem bolts onto the stem.
Install the derailleur cable guide under the bottom bracket. (remember we took this plastic piece off prior to frame powder coating). Play close attention to the photos below for the correct orientation.
Spray some Tri-flow lubricant on a rag and wipe it down the entire length of the rear derailleur cable (shifter on the righthand side of bike).
Included with the shifters are three cable housings. The two long ones go up front on each of the shifters. The short one (with the funny end) goes on the back of the bike at the rear derailleur.
Install one of the long cable housings onto the cable connected to the rear derailleur shifter. It will exit the shifter and travel down the righthand side of the bike to the rear derailleur.
Thread the cable through the shift adjuster on the righthand side as shown.
Thread the cable through the plastic guide at the bottom of the bottom bracket. It should go through the righthand side. Make sure you go under the little plastic tab (keeper).
Continue down the righthand chain stay tube and thread the cable through the welded eyelet.
Install the short cable housing onto the cable and position it as follows. Make sure the funny end is facing toward the front of the bike. This funny end keeps dirt from entering into the housing.
Thread the cable and the housing into the derailleur actuation arm as shown below.
Now we are going to set the derailleur stops for the high and low gear. Take a look at the smallest sprocket on the wheel cassette and compare that to the position of the little sprocket wheel on the derailleur. See how the they do not line up.
Use a phillips screwdriver and turn the top adjusting screw and note how it moves the derailleur left and right.
Adjust the screw above until you see proper alignment as shown below.
Now using your hand push the derailleur to its left most position. It’s kinda tricky to get it to move, but once it does, you’ll feel the spring tension and you’ll feel it push up against the left most stop.
While holding the derailleur against it’s left most stop, use the lower adjusting screw to align the largest sprocket on the wheel cassette with the little sprocket wheel on the derailleur.
The end result should look like this.
Now that we have set the stops, we can move onto connecting the cable.
Begin with setting the shifter it’s lowest gear. (Note: this position extend the cable to it’s greatest length)
Confirm the shifter adjuster is not extended (meaning the threaded knob is fully threaded into the housing).
Route the end of the cable under the securing tab on the derailleur as shown.
Use a pair of pliers to pull the slack out of the cable while tightening the derailleur bolt onto the cable.
Ok, now that the cable is connected, let’s check our limits that we setup previously. The highest gear (smallest sprocket) thats position that it’s already in, should look like this.
Now shift gears to the lowest (largest sprocket) and it should look like this.
Trim the excess shift cable with approx. 1.5 inch remaining. You need cable cutters to cut these cables, they are tough!
Install aluminum ferrel at the end of the cable and crimp with pliers.
Proceed to front derailleur cable install.