Chain Tensile Strength

Is the tensile strength of a chain a good indicator of how much it will resist stretching? Is it safe to assume that a chain with a higher tensile strength will stretch less than one with a lower tensile strength, or are there other factors involved?

Yes tensil strength is a measurement of something being pulled lineally or in simpler terms....stretched. Also other factors would be o-ring vs non o-ring. The o-ring chains keep the grim out from the rollers and reduces wear. I thought I'd try the did ERT, you know, the one the pros use, less rolling resistance and all that. That thing is a pile of dung I wore it out in a third the time of my stock o-ring. I guess if was a pro and had a FREE new chain to put on every race, I'd use them too. Since I'm not, I'll be going back to the o-ring type.

Bill

It turns out that they usually also have the best surface treatments for resisting wear on the chains on which they use the best materials in terms of tensile strength, so you win two ways. I'm guessing you've read DID's (?) catalogue or whichever one was the first guys to emphasise tensile strength vs just saying "use this on a 125, use this on a 250" etc. The X-rings are more tolerant of flapping around etc in terms of staying sealed. Chain "stretch" usually comes in the form of bushing wear, not stretching the metal itself unless it is an incredibly crappy, cheap chain on a really big-motored, spin-out-abused bike. You can verify this by taking a worn out chain, lay it down straight and you can compress it back to it's original length side by side with a new chain, and then stretch all the slop out of it and see how much longer it is than the new chain. The length change comes from loose fit of the links to each other.

The other big wear point is the outer rollers. On a new chain they're tight on the bushings; on an old chain you can grab one between your fingernails and wiggle it side to side on the inner bushing. A severe amount of slop usually precedes cracking the roller right off the chain, leaving the bushing which doesn't then actually contact the sprocket. Instead, the two adjacent rolers take up the load and wear even faster, like an accelerating self destruct process. So, if you lose a roller on the trail, take it easy till you get home. These roller surfaces are also hardened against wear with varying degrees of quality.

Mid or higher $ chains are worth it because they prolong your sprocket life too, another chain wear-out related cost.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Similar Content

    • By GarrettSG
      I need recommendations on Honda dealers with good Mechanics in Western Washington. I am in Puyallup but will drive for peace of mind. I have never had a dealer do major work on any of my dirt bikes. But long story short I am on a 15 CRF450R and it needs the 5th gear recall done. Any and all info is much appreciated! 
    • By jakebarritt
      I have a 2005 CRF450R with a Trail Tech fan kit installed. I need a little bit larger tank and would like to know if anyone has an aftermarket tank that fits with the fan kit.
      I dont need a monster 4 gallon, just maybe a 2.4 or 2.7 from IMS would do fine.  I talked with both the tank vendor and Trail Tech and neither could give me any answers.
      Thanks guys.
      Jake
      Minden, NV
    • By NickC18
      So I emailed Factory Connection today to see what spring rate I need for the rear as I’m about 6’2” 220 lbs without gear. I also asked for a baseline front fork PSI to start at. This is what I received:
      Nicholas, 
      The spring series we made for your bike is limited when it comes to larger/stiffer rates.  
      The spring rate you need is 5.9/6.0 range. We don’t sell that over the counter as it requires special installation process.  So we can’t sell the spring “over the counter”.  It would have to be installed at our shop.  
      Fork PSI I would recommend:
      Inner 160 psi
      Outer 11 psi
      Balance 160 psi
       
      Are they blowing smoke up my ass? What kind of ‘special installation’ could a spring take? I’ve changed and removed them before but not on a 16’ CRF before.
      Also, aren’t those psi settings for the Kawasaki KYB? I don’t think the psf2 have inner/outer/balance do they? Maybe he was having a bad day...or maybe I’m an idiot. FC’s website list there spring as ALS-0059. Can I not just order this spring and install it to set my sag correctly? Help?
    • By johnsbikerepairs
      hi, i have a crf450R 2009, having difficulty setting the idle knob to factory setting.  Having problems interpreting manual Japaneses interpretation.  Can anyone out there assist with the correct factory setting and how i can manually do the setting ie how many clicks out or in etc...   would appreciate any assistance 
    • By Baja Designs
      Hello CRF450R Owners,
      Bailey here with Baja Designs.  We recognize ThumperTalk as one of the go-to sources for information on the CRF450R and we receive emails daily regarding the best inexpensive light setup or purchasing the B1K setup ran by Ox Motorsports.  We would like this thread to be a General Discussion area for members and guests to discuss Dual Sport Kits (DSK), Lights, and Lighting Acessories based upon stock and modified charging systems.  Please Post up if you have any questions or comments CRF450R related! 
      www.bajadesigns.com