CC-4 - Chain Wear Indicator

Product Information

Finance is subject to application, financial circumstances and borrowing history. Performance Cycling Limited FRN: 720557 trading as Tredz are authorised and regulated by the Financial Conduct Authority. We are a credit broker not a lender – credit is subject to status and affordability and is provided by Mitsubishi HC Capital UK PLC. Terms & Conditions Apply. You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods. I believe this is a reasonably decent calibration chart as I hit 0.5% or 0.75% on the chart, the other Park Tool CC-3.2 pass/fail gauge nicely slides in at the 0.5% and 0.75% sides respectively. The conversion table is of course not perfect as some chains came with an initial stretch measurement less than 0% (i.e., the CC-2 gauge would not fit in place). As such, 0% does not represent true zero. That said, we are really interested in the 0.5% or 0.75% wear, which the chart seems to approximate well (for how Park Tools measures chain wear). Most riders will be able to change the chain at a (real) wear of 0.5% but I have seen some where they can do so at nearly 1% wear, without skipping.

As you can see your measurement of 120mm suggests 0.4% stretch. Typically I will measure the chain with Vernier calipers in three random places and take an average, then compare against the chart. I also record these measurements and regress them against the current distance or duration to get a better estimate of the current wear rate, as well as projecting service intervals. Predicting Service Life If you wish to return your bike to us please keep it in the box it arrived in and call us on 01772 644340 and we will arrange a collection. I settled on your inner measurement approach (pictured above) and calibrate my Vernier calipers against a CC-2 device, so I could translate a linear measurement into an approximate % wear. I did this by creating a calibration regression chart converting the Vernier L1 measurement to a stretch percentage (see below). I figured that while the CC-2 can be difficult to use consistently, it should at least be generally accurate. Note that my calibration measurements involved only a very light push on the CC-2 gauge. Calibrationdon't mention variable elongation vs replacement in the same way. But the CC4 is a better design which measures pin wear only. Because you are also attempting to use Vernier calipers to estimate chain wear I thought I would share a method I derived for using Vernier calipers. I decided to follow the same method as the Park tools (inner measurement - your L1 approach - for 10 links) as I wanted to include wear on the bushings (as this is what the cog interacts with). As many have pointed out there is no perfect way to measure chain elongation. This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items.

but the CC2 is an older design which also includes roller wear in the measurement. CC3.2 instructions say the same thing and this tool also includes roller wear in the measurement. Dunno about CC-3 which is the one that Horizon has I suppose. I also have moved to measuring chain stretch via Vernier calipers, however my approach differs from yours as I try to mimic the cc-2 type inner measurement but with more precision (see below for methods). According to my calibration chart your L1 measurement suggests a chain stretch of 0.4%, which seems like a lot for 600 km, but not impossible. I would try repeating your L1 measurement a couple more times to be sure. Either way, you will likely need to change your chain soon. Using Vernier Calipers To Measure Chain Stretch Please enclose all your details and a covering note explaining the fault and any other useful details. Our experts recommend certain products for every rider, including stands. Your bike addict options in this category include event, portable repair, and wheel truing stands. And we’ve got shop aprons, bar style shop stools, and mechanic gloves along with coffee mugs when you’re ready to take a break!

Customer Reviews

The granting of a best price is not combinable with other promotions (e.g. "free articles) from Bike-Discount. It is scary how bad the Tiagra chain is, out of the box it's stretch measurement is nearly 0.5% and I would be surprised if I get 40 hours of riding out of it (less than a month commuting) if I wait to 0.75% before I change. This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items. To return faulty items see our Returning Faulty Items policy. Customs clearance fees -these vary from country to country and also vary by declared value in some juristictions. a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model.