2

While changing my bike chain, I noticed letters stamped on some of the links. The old chain (Shimano CN-HG53) has »OG« stamped on some links, while the new one (Shimano CN-HG93) has »RL«. Google doesn't find anything useful. Anyone knows what it means?

Chains

9

The RL and OG might be date codes. Assuming these are 2 different chains, RL would denote 1993-December and and OG would denote 1990-July. If you think they are newer than that, the chart isn't up to date, but if you follow the pattern, RL could be 2019-December and OG could be 2016-July. The second set of dates makes a lot more sense based on what I can see visually from picture.

3
  • 1
    Plausible. I have two HG701 chains on current generation Ultegra groups. One is marked RD, and the other RE. Both were purchased in 2019 or 2020. – Weiwen Ng Jun 20 '20 at 14:37
  • Bought the bike used in 2017, with a new chain (the »old one«) put on by the shop. Got the »new one« from amazon a few weeks ago, so it all checks out perfectly. – MaxD Jun 20 '20 at 14:51
  • Does age of chain matter at all if both are new/unused? This might be more for stock control, to clear older packaging etc. – Criggie Jun 20 '20 at 22:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.