CC-4 - Chain Wear Indicator

Product Information

You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods. Whether it’s a jersey that doesn’t fit, or the colour is not quite right, sometimes you’ll need to return items to us. This shop declares the total paid for the goods for customs value, no exceptions. We will not declare low values as thats fraud and we will not be party to it. a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model. The granting of a best price is not combinable with other promotions (e.g. "free articles) from Bike-Discount.

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. 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.

Using Vernier Calipers To Measure Chain Stretch

Perfectly uniform wear (to the nth degree) is not that likely, but if the chain is wearing unevenly to a noticeable extent, this may be a clue that it isn't just ordinary wear that is the culprit; it may mean that the chain is corroding as well.

I repeated three measurements of the CC-2 gauge at the 0%, 0.25%, 0.5%, 0.75% and 1% gauge readings. I then took the average and did a simple linear regression against the gauge readings (below). 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. Your high CC-2 reading likely relates to how much pressure are applying. The CC-2 device is not particularly solid and its readings are sensitive to how much pressure you apply to the pivoting gauge.

Q&A

The most accurate way seems to be hang the chain off the bike and use a calibrated ruler/tape measure over several links (in the hanging case, they suggest 100+ links, the longer measurement reduces measurement error). If you don't want to do that, a good ruler/caliper on the bike and measuring lengths. There are two ways to go about buying the Park Tools you’ll need. The first is to get the equipment already bundled, like our home mechanic starter kit, and the second is to piece the right items together as you need them.

For hygiene reasons, any intimate garments such as facemasks, underwear and swimsuits can only be returned if the items are faulty. 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. Calibration Customs clearance fees -these vary from country to country and also vary by declared value in some juristictions. A better quality chain tool can help, or using calipers/a ruler as you are using. See this article from Zinn, for example -- essentially, you need to get an idea of the errors your tool makes, and you can be conservative with the replacement requirements (analogous to oil change intervals for cars; this can be a bit wasteful). Or, get a more accurate measurement (analogous to oil life meters in newer cars). It looks like he uses the Progold or Rohloff tools, which are inaccurate, but by getting an idea of the errors it makes, you can make a rough guess if you need to look closer for measurement, or just say screw it and replace the chain (even if its early)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