LZ’s Tech FAQ: Technical FAQ: Drivetrains and tubular tape – It’s important to replace chains and cassettes when needed. Photo: Caley Fretz | VeloNews.com Determining chain, cog wear Dear Lennard, I’ve been diagnosing a friend’s bike (Specialized Ruby Elite, 105), after I replaced a badly-worn chain (1%). Her LBS said they swapped the chain 1,800 miles ago. The wear I found at 1% says to me that’s more like 6,000-7,000 miles on that chain (Tiagra HG4601, correctly-orien… http://ow.ly/2Z770I
