OneUp Components Chain Guide (Top) ISCG-05 V2

OneUp Components Chain Guide (Top) ISCG-05 V2

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The One Up Top Chainguide will help you eliminate dropped chains forever and more than double your chainring life. At only 40g the OneUp Chain Guide is incredibly lightweight and can save you money in less than a season. The first chain guide designed to be both Oval and Boost compatible. As a Narrow Wide ring wears, over time the teeth thin and lose their chain retention ability, leading to more dropped chains. Installing a OneUp guide means you now only have to replace your chainring when the driving faces have worn out, which typically doubles your usable chainring life. Buy less stuff - Work Less, Ride More.


  • Eliminate dropped chains
  • Almost every EWS pro runs both a chain guide and narrow-wide chainring
  • Backplate cut from 8mm thick 7075-T6 aluminium
  • Boost and oval chainring compatible
  • Tool-less upper guide flip
  • 7.5mm of chainline adjustment
  • Compatibility with chainrings from 26-38t
  • Single tool install without removing your cranks
  • Mount: ISCG-05
  • Weight: 40g

Delivery & Returns

Unless otherwise specified we will use a Royal Mail International Tracked Delivery service to dispatch your order. Once your order is dispatched you will receive an email with a tracking number. You are able to track your order at

European Orders

European orders are sent using Royal Mail International Tracked Delivery. These items are usually delivered within 3-7 working days of dispatch.

We have set tiers for postage prices depending on the size and weight of your order from us. Shipping costs are calculated and displayed at the checkout stage.

Bike Orders

Santa Cruz, Juliana Bicycles and other bikes & frames are shipped to most European countries free of charge. Shipping charges are calculated at checkout, so please add products to your cart to see what shipping charges will be applied to your order.

For full details of our returns policy, follow this link.