23. How to Replace Your Chainrings
Basic removal and installation instructions for 5-bolt chainrings on 3-sprocket systems.
This tutorial will demonstrate how to remove and install chainrings. Since there are so many different crank and chainring sizing combinations, I'll stick to the basics and give a general overview of the process based on a 5-bolt, 3-chainring system.
Before removing the largest two chainrings you'll often have to remove the smallest one, which is often threaded directly into your crank arm. Use your allen key to loosen all of the bolts that hold the chainring in place, and then use a marker to make a note of the chainring's position in relation to the crank before removing it completely. Some chainrings have a bump sticking out that should be lined up with your crank arm.
The largest two rings are usually bolted to each other with a nut and bolt. Here you'll need to hold the nut in place with the special chainring wrench while you loosen the bolt with your allen key. Once again it's a good idea to mark the chainring's position in relation to your crank arm. The two largest outer rings often have a few spacers or washers in between, so be sure to note exactly how they came apart so they can be reinstalled correctly.
While it's ok to install a new chainring that has a different number of teeth, you'll want to make sure that your new chainrings have the same side profile as the old ones.
Before you reinstall the bolts, apply a thin layer of grease to the threads to keep out moisture. Now you can reassemble all of your chainrings the same way they came apart.
Make sure all of the bolts are finger tight and then begin tightening them evenly in a star pattern. Start by tightening the first bolt, and then every second bolt until you've gone all the way around. Repeat this process until all of the bolts are tight. Be careful not to over-tighten. Park Tools recommends 44-88 inch pounds of torque for aluminum bolts, and 70-95 inch pounds for steel bolts.
Have a BMX bike that the single speed freewheel is worn out on. The problem is that the freewheel was installed backwards. So, the notches that the freewheel tool would grab on to the freewheel to remove, are on the inside of the wheel next to the spokes.
There are two small holes that are 180 degrees apart from each other on the outside of the freewheel.
Is there a tool to use these holes to get the freewheel off?...
or is there another way to remove the freewheel?
Thanks... Read more >>
I have an older(vintage) bicycle, it,s a 7 speed using suntour radius parts. I want to change out my chain ring. Some say compatible with 9 or 10 speed, does it really matter? If I buy the same rings as 52/42 with the right BCD.... Read more >>
I have a Bianchi with SRAM Red components. The cassette is a 11-28 10 speed. The crank is 53-39. I recently put on a new SRAM 10 speed chain and the chain skipped while riding when I was applying heavy pressure to the pedals. I then put the old chain back on and the problem went away. It feels as if the skipping is coming from the cassette rather than the crank. I tried it again with yet another new chain and had the same problem. Is it possible that the cassette has worn with the chain and it won't work with a new chain? I thought I might ask before spending the money on a new... Read more >>
Hi, need some help to find a replacement for chainrings (if thats correct name) for a 5 arm spider style crank. Old setup was 42,34,24. Having troube to find the same again, would prefer to not have to change crank. Also like how shiny the crank it is soapy water, alchohol wipes and a lot of elbow grease.
Read more >>
My 1997 Trek 720 Multitrack was diagnosed at the local bike shop that the crankset, cassette, and chain need to be replaced. I think the front derailer also needs replacement. I ride for fitness so I do not care that much about the weight penalty using this older & heaver bike. I checked my online cycling log that tracks my workouts and it was says there is over 5,000 miles over the last few years. Its time to replace the original components on this bike.
I looked into buying a new bike and got sticker shock. So, I started looking into buying a used bike or fix want ... Read more >>
Hey, lately I have been noticing an extremely annoying clicking/grinding when I am pedalling - it's mostly that I can feel it in my feet, but if it's pretty quiet around I can hear it as well. It's very inconsistent - sometimes I hear it very often, then I could go a minute or so without hearing it. I feel it in both feet, sometimes together and sometimes one at a time, but more frequently on my drive side. Generally, it's worse when putting more pressure on the pedals.
I really thought it was my bottom bracket, because there is an opening at the bottom of my frame under the bottom brac... Read more >>
Was MTBing the other day and was about 9 miles in, a 16 mile ride, and a couple hours of daylight left, when the 9 speed KMC quick link broke on my chain. As soon as I saw what happened, I started to think, "This is going to be a long walk back!". I calmed down some and thought, "I believe I put a extra quick link in my backpack." Sure enough, I did. Whew!... I had a single speed link and a 6,7 and 8 speed quick link. I then relized I was riding a 9 speed MTB. Well, to make a long story short, I tried the 6,7 and 8 speed quick link and it seemed to work fine and got me... Read more >>
I hope you can help me. I bought a new 26" MTB rear wheel online and it has a Shimano Deore hub, I was trying to attach a new CS-HG20-7 Shimano Hyperglide Sprocket (with 7 gears and 12-28 teeth), but it seems the "Sprocket socket" (I am not sure what it is called) is slightly longer then needed, I could theoretically fit another gear cog.
Are there some kind of "spacers or washers" available? If yes, what are these things called?
Or did I mess something up? Is this normal?
I am new to bike repairs,... Read more >>
This might be a dumb question/problem...
Today I took my cassette off and I forgot to keep it in order so now the spacers and cogs are all out of order.
Does anyone know how to reorder the spacers (some are different thicknesses) and gears correctly?
It is a SRAM Red cassette.... Read more >>
Does anyone know if Ultegra 6800 cassette will work on Dura Ace 9000 group? If not do you know if Shimano has fixed the issues they had with the 9000 cassettes?
Thanks... Read more >>
I removed and replaced the cassette on my bike (making no changes). Now I find that when the wheel is under load the chain climbs up on the teeth of the smallest sprocket (see photo).
Everything works fine with the other gears or when the wheel spins freely. This seems to be the *opposite* effect I'd expect if the chain had stretched or the gear teeth were worn. Instead, the pitch of the chain seems too short, not too long. Can anyone explain what's happening and how I can fix it?... Read more >>
Hi all. i am new here and generally also pretty new to doing anything with my bicycle myself.
I was driving my bicycle today and suddenly noticed that the rear chain ring got completely detached
from the hub and was just free rotating. I never before had a closer look at how it looks like, so I have no idea, what exactly got broken. Now it looks like that:
[img] Read more >>
Does anyone know the correct tool for this freewheel removal. The Park FR2 is too small.
The freewheel comes from a 1980s Raleigh Record. I've tried two local bike shops with no joy.
It has a Maillard stamp.
Thanks and Regards
... Read more >>
How do I get from this
The first picture is the model I have sachs LY 94. 8 speed 12-21. I have the freewheel and cassette off the wheel like in the ... Read more >>
Hi, this is my first post to the forum! I have an old Focus MTB, bought it just recently second hand and I am also new to biking so please excuse me for being naive.
The problem started after the first miles with the bicycle, hearing a noise from the back. It was getting louder and louder very quickly and now, when I am pedaling everything is normal but when I stop and keep the pedals still, while on the road, the chain turns really loose and even goes out of the ring. This happens all the time. Tried with some lube and also tried to see if there is an obvious problem with the chain b... Read more >>