31. How to Replace a GripShift Cable
Learn how to disassemble and reassemble a twist shifter to replace the inner shift cable.
Today we'll learn how to replace a Sram GripShift(R) style shifter cable. For this job, you'll need a replacement shift cable and end cap, a 2.5mm allen key to open the grip shifter, a 5mm allen key or 9mm open end wrench to loosen the derailleur pinch bolt and brake levers, a cable cutter to trim the cable and pinch the cap, some light oil to lube the cable housings and a tiny bit of waterproof grease for inside the shifter.
The first step is to remove the old cable. Shift either your front or rear derailleur to the smallest sprocket and cut the old cable cap off. Then loosen the pinch bolt and slide the inner cable out of the derailleur and cable housings.
Now loosen your brake lever and slide it along the handlebar so we have room to open the grip shifter unit. Turn the shifter to the highest gear if you're replacing the rear cable, or the lowest gear if you're replacing the front. You'll notice a small allen bolt on the outside of the shifter body. Loosen this off but don't un-thread it completely as they are really easy to lose.
Once the shifter turns freely on the handlebar, jiggle and pull the grip apart until it separates into two parts. Sometimes it helps to very gently pry it open with a flat screwdriver.
Now you'll have to be extra careful. The first thing watch for is a tiny piece of oddly-shaped metal sitting on the inside of the shifter. It's really important to keep that spring exactly where it is as the shifter won't function without it. Slide the old cable out of the shifter and pay careful attention to how it was wrapped around inside the shifter. The cable usually wraps around once and sits in a little groove.
Apply a tiny dab of grease to the grooves where the cable sits inside the shifter. Slide the new cable back into the shifter, loosely wrap it around once, and then slide it through the shifter body. Now pull the cable tight and set it down into the shifter grooves the same way it came out. If it looks right, push the two parts of the shifter back together and try turning the shifter. If the cable is installed correctly it should click and turn normally. Slide your brake lever back into position and tighten it. Now turn the shifter so the cable is tucked up under the brake lever and tighten it as well.
Drop a little bit of light oil into the cable housings before installing the new cable. Thread the inner cable back through the housings and the derailleur pinch bolt. Make sure your shifter is in the smallest sprocket and then pull the cable tight and tighten the bolt. Now run through the gears and adjust your front or rear derailleur as needed.
The last step is to cut the excess cable off about two inches past the pinch bolt. Then slide on the aluminum cap and just partially squish it 2 or 3 times with your cable cutter so that it stays on. This will keep the cable from fraying.
Hi - I am working on a wheelchair rather than a bicycle however it does have caliper brakes on both back wheels which are controlled by regular brake levers located on the wheelchair hand grasps (at the back). I want to control the brake levers remotely via two servo motors. I need to move the location of the brake levers so that someone can still push the wheel chair and that the servo motors won't be in the way of the users hands.
I need the resistance on the brake lever to be as 'light' as possible so that the servo motors can have the torque to open/close the brake lever incr... Read more >>
I am getting a 1978 Raleigh Grand Prix road bike into riding condition. The derailleur cables need replacing. Can I use standard cables found at a local bike shop or do I need to find special "vintage" cables online? This is my first bike repair project, so any help would be appreciated.
---Anders... Read more >>
Just about to replace the inner cable on my XT M8000 11 speed shifter. Can anyone tell me if I need to use the Optislick inner cable or would a PTFE one be fine. Also does the Optislick cable have a different housing. Cheers Stevo... Read more >>
I know the difference between the 2 cables but how do I spot the difference between the 2? I have bought both cables and they will be delivered later this week. Is there a difference visually, feel wise?
Thanks... Read more >>
Can anyone tell me what PE lined brake cable mean? Also how do i tell if the cable is PE lined or not when looking at it? I have had a quick look on google and no luck so far.
Thanks... Read more >>
About 2 months ago, I put new cables on both the bikes (1970 Gitane, 1980 Peugeot) I've been restoring...
I have been checking the alignment of the gearing and brakes, and I believe I've noticed a minor 'new cable stretch' for lack of a better term....
What I'm trying to say is, I'm noticing a slight re-adjustment in brakes and derailleur adjustment that's needed a couple months after the install...
I kind of remember this to be true on motorcycle Clutch cables.. but have not seen t... Read more >>
So I've recently noticed that my rear dérailleur has almost completely lost its ability to shift the chain between sprockets (on a good day, it can move between two of the seven rear sprockets).
I think I've found the source of the problem in the shift mechanism:
In the photo, you can see the dérailleur cable enter a white plastic part (just below the "2"). You can also see some big metal wires emerging from the housing and meeting this white plastic part (just below the "1").
When the dérailleur shi... Read more >>
I was having issues with my bike chain slipping on the front derailleur mid ride and skipping gears on the rear when shifting. Did some reading determined that my derailleurs probably needed adjusting, most likely because as a relatively new bike the cables would have stretched. I had my housemate have a look (he has a little bit of bike knowledge) he twisted the H and L screws and the barrel adjuster to show me what they do (actually made the front derailleur worse) and left me to it.
Anyway I'm normally pretty good at fixing things so I followed instructions from the internet a... Read more >>
Can anyone tell me where to begin when resetting the position of the front derailer and shift cables on a cheep older Walmart bike? I was trying to fix the scrapping of the derailer and shifting problems but messed up and loosened the shift cable bolt and can't get anything back. I loose the large ring or the small during shifting so I need to start from scratch...but where?... Read more >>
I recently got a Trek Antelope 800, and the thumb shifter is broken. I have found a thumb shifter (Shimano Tourney SL-TX50) but I am not sure if it comes with the cables I need to install. Anyone know where I could get these cables?... Read more >>
I'm putting my plan together to fix up a Fuji Allegro, and I'm curious if I can tuck the cable housing for the brakes under the handlebar tape, or if it must be above. Not a deal breaker either way, just curious if it is a functional idea.... Read more >>
[attachment=4841]I have a non-branded carbon fiber TT bike (Cervelo P3) purchased on the internet. It looks very similar to the picture posted. The problem is once the shift cables are installed and adjusted the shifting only works a couple of times or less and then hangs up and the cable binds up somehow and the bike will not change gears. When you take the tension off, the cable will slide back and forth thru the housing without hanging up. Has anyone experienced this before? Is there a way to replace the internal housing? I think the frame is not hollow and has plates that the housing ... Read more >>
So I bought a new Schwinn bike to replace my old one that got stolen, and on the first set of gears (the ones connected to the pedals) the cable wasn't taught enough to switch gears. So, I researched, and found that the cable had to be tighter. So I thightened it. Now it goes up to 3 from the first gear, but it won't go down to the 2nd gear. So I turned the dial to one, and it went to one. It won't go to the second gear even though the dial says it is. What should I adjust to fix this? I ride long distances, and up bridges, so this is kind of a big problem.... Read more >>
Can anyone tell me the difference between galvanised and stainless steel cables/wires? From what I have read online, stainless steel doesn't rust. I have bought some cables, so how do I check what material it is?
Thank you... Read more >>
Hi! Newcomer here.
I am the proud owner of a KTM Ultra Fun So far it has been nothing but joy, until recently the right-hand gear-shift cable decided to burst and detach from the gear-shift lever (Shimano ST M410) in the middle of a ride, part of the cable remaining inside...
The first pic below shows the large fraction of cable as I was able to retrieve. The second one zooms into the broken end.
[at... Read more >>