4. How to Calculate Chain Length
Measure the correct length of a new bike chain.
When you purchase a new chain, it usually comes with extra length so that it is compatible with most drivetrains. How do you know how much length your bike will need? Well, it's really quite simple...
The first step is to wrap the chain around the largest sprockets on the front and rear, so that the ends meet on the largest front chainring. For this step, it really important to not run the chain through the rear derailleur.
Next, position the chain on the chainring's teeth at the tightest spot you could connect the chain. Now add one whole inner and outer link, so that you have approximately one extra inch of slack in the chain. That will be the optimal length for most systems.
Complete carbon fiber (frame) road bike less than one year old - 105 10 speed. Built it myself and it has been fantastic up to now. About a month ago I started getting a loud rattling noise everytime a rode over slightly rough ground (chip and seal). on smooth road it is silent. It is obviously coming from the rear part of the drive. I always ride on the big ring on the 4th cog from the top - flatland. Here's what I have checked : Chain is a good length but I have tried two links shorter and two links longer. Tried a brand new chain. checked that all bolts are tight, pulleys, ... Read more >>
I have a new project on my hands and am trying to service a cassette of a bike I recently purchase second-hand. The bike I have is a MTB- Shockwave XT950. Can you please let me know how to open this cassette. I have tried various videos however I am unable to find a video for a similar cassette.
Hx... Read more >>
The chain comes off my rear small sprocket on back peddling. The bike rides good other wise.
I have noticed other riders on the side of the road with the same problem. Without a wheel wrench it is quite hard to free up and put back onto the gear cluster. What causes this malfunction?... Read more >>
Being new to this hobby I ran across the 12" rule for chain wear. You pull the chain tight, right on the bike, measure 12 links, the distance between 25 pins, and if it measures 12" the chain is like new. If it measures 12 1/8" you throw the chain away and replace it.
Something new to check out now. i imagine a worn chain causes shifting problems as well as drive train inefficiency. Do others here you use this method for determining chain wear??... Read more >>
I am asking this one for my dad (78.5 yrs old). He just got a bike on craigslist (Marin Redwood), comfort style.
He likes it, but wishes that it had lower crank gearing. According to the Marin website, I see that it has a "Crankset: Suntour XCT light 48/38/28".
My dad says that he thinks the chainrings are riveted on, but his eyesight isn't the greatest, and I have not had a chance to go there and look for myself.
Do you guys know whether the chainrings are replaceable on this "XCT light" crankset? I can't find any specific info to ... Read more >>
Have Dahon folding bike with missing chainring guard.
Looking for a source.... Read more >>
First of all I have been trying to research this bike and have come up empty.
What I do know, it has a belt vs chain and it looks a little dry.
I don't even know where to begin to find a replacement for it because I can't find it anywhere on the internet.
... Read more >>
I am buying a new bike, it has a Shimano FC-5703 triple ring crankset, 50X39X30T, bcd 130mm.
I am a casual rider, and really want some type of chainguard on here so that I can ride in jeans without need for a leg wrap to keep my pants leg out of the chainrings.
I do not know what the difference is between a "bash guard" and a "chainring guard / "chain guard".
Regardless, what is the best way to accomplish some type of chainguard on here? What will I need? I can find chain guards sold on ebay made by Driveline, but is that the correct ... Read more >>
I have a 2012 Trek 7.5 Fx Hybrid bike that I need to replace the Freehub body on the rear wheel. There are no identifying marks on this hub anywhere. The cassette that is mounted on the Freehub body is a CS-HG61-9. The gears on the cassette is 11-34 and its a 9 speed. Is there anyway to exactly identify what freebody hub this is so I can get an exact replacement?... Read more >>
Well, hello everyone this is my first post.
I have been trying to renovate an old road bike a British hercules. The thing is that the bike has old components and I have trouble finding other ones. I want to keep the front chainring 48t but remove the internal hub that my gramp was using. Instead i decided to buy a nice wheel with a 9 cassette and the suitable deraileur. Well my main problem is...Will this fit with the 48t chainring? Is the deraileur going to be ok with the claw type hanger (the bike has no built-in hanger)? In copenhagen where I live we have no steep hills, every... Read more >>
I have a two ring Tracer crank on my ross road bike. I am just wondering if it's any good or not.... Read more >>
I got a Bell brand chain from walmart for my other bike and the quick link is so annoying to put back together when I need to take it off for some cleaning. Well, I try and hold the derailleur and put the chain back together but I suffer from panic attacks from time to time and I just get so annoyed with having to hold the derailleur and putting the link back together at the same time. Any tips to help me do it better without getting frustrated or annoyed?... Read more >>
So my bike kind of broke and I adjusted some things to fix it, but then a new problem arose.
The thing that broke and bent badly was the metal that held the two cogs in the back wheel of the bike ( the gear shifting thing) so I bent it back into shape and screwed it back on but whenever I pedal the bike the chains starts going into its cycle but in a few seconds the chain slips off the bottom cog in the gear shift and the chain slowly slips off everything else. Is there anyway I can fix this?[/align]... Read more >>
So I'm new to these forums and also to bicycling, like I just recently learned how to ride a bike and a 2 weeks ago I bought my first bike.
So I have been having troubles with my bike for some days now, It got really bad at one point but I've been able to fix it a bit. With very bad in the form of the chain falling from the front gears.
I have fixed that, however, the chain cannot get to the biggest gear of the front. I'm not really sure why.
Can someone help me?... Read more >>
I'm running a full SRAM X9 / X0 on my hard tail with XT discs. I want to move from 2x10 to 1x10 set up. The biggest cost is the cassette to give me more choice will a Shimano cassette fit onto a SRAM ready hub?... Read more >>