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OneUp Components Chain Guide - BB Mount/ISCG 03

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Eliminate dropped chains forever and more than double your chainring life

The OneUp BB Mount / ISCG03 guide uses the same simple, one tool adjustment as our best-selling ISCG05 Chain Guide. At only 34g the OneUp BB Mount / ISCG03 Chain Guide weighs less than a sip of water, and can save you money in less than a season.


  • Single tool adjustment (4mm hex)
  • Boost compatible
  • Oval Compatible
  • Stainless Steel hardware
  • Includes 2 top guide pieces 1xBlack 1xGreen
  • Patent Pending adjustment system

Weight: 34g
Capacity: 26-36T
Chainline: 5.5mm adjustment
Mount: Threaded BB Mount / ISCG03*

*Almost all ISCG03 equipped bikes have threaded BB shells and so are compatible with this guide. Double check you have a threaded BB before ordering.