Often considered the template for chain guides, the World Cup 1 set the benchmark many moons ago and still goes from strength to strength today. Using the double plate system, it's ideally designed for elevated chainstay bikes.
This double plate does a fine job of creating secure and complete closure of the chainring, with chain tension being taken care of by the two rollers and the ISCG or bottom bracket mounted boomerang. It may be a little heavier than some, but the extra strength and security this device gives the bike just adds to your peace of mind.
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