CC-4 - Chain Wear Indicator

Product Information

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. 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

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! For hygiene reasons, any intimate garments such as facemasks, underwear and swimsuits can only be returned if the items are faulty. 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. 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).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. don't mention variable elongation vs replacement in the same way. But the CC4 is a better design which measures pin wear only. 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.

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. The granting of a best price is not combinable with other promotions (e.g. "free articles) from Bike-Discount. a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model. So I happen to be interested in an exact number for chain wear, but it arguably isn't so relevant for any given rider; whether the measurement includes roller wear or not doesn't really matter, because the exact chain wear won't tell them if they can fit a new chain or not anyway. The point which you have definitely left it too late depend on many things, not just the exact pin wear in the chain.Faulty items should be returned within a reasonable time and in a clean and dry condition. PLEASE NOTE, WE WILL NOT PROCESS DIRTY ITEMS. 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. However this isn't ever a fixed point; it varies with the chain type, the rider, and the pattern of use. So some folk get away with changing the chain at (a real, pin-wear only ) elongation of 0.75%, others can't go more than 0.5% safely. 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 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).