KMC Z50 Bicycle Chain (7-Speed, 1/2 x 3/32-Inch, 116L, Dark Silver/Brown) Review

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(More customer reviews)I installed this chain on my Trek 820 mountainbike on Feb 4 (2009); on May 28, I put my bike in the shop for occasional chain-skipping, especially on the 1st and 2nd chainrings. The shop expert told me the chain was stretched and couldn't believe it was only in use for a few months. Since I have other bikes, I logged less than 500 miles on this chain. Even though the price was very low, I don't think the chain is worth buying, given its short lifetime. Next time I'll spend $15-$20 and get a better quality chain; a stretched chain can quickly damage your chainrings - so think twice before buying the least expensive chain.

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Shimano CN-7701 Dura Ace XTR 9-speed Chain Review

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(More customer reviews)there are several good nine speed chains on the market. Most work well if you install them correctly, and don't over stress them. This chain, the cn-7701 runs smooth, shifts well, and last the longest on my three nine speed bicycles. The Sram chains sre good too, the cross step is very strong and well made, but the quick connect, master link sometimes "catches" on the shift faces and sends a shock through the drive train. The shimano pin is easy to install, but makes removal for cleaning more difficult, I only clean the shimano's on the bike with a chain cleaning tool and simple green. You can run the sram link on the shimano chains too. Finish line ceramic wet lube seems to give me the best service life and shifting. Follow shimano's instructions on install, check to make sure all the rivets are in place properly. If you must "break" the chain after the first install, go several links away from the first install pin.

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