OneUp Components Under Bash Guard

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If you're looking for chain bash protection to add to your existing integrated chain guide, then the OneUp ISCG05 Underbash is the perfect solution. A lightweight (68g 32-34T) and incredibly tough bash guard made from 7075 aluminum and glass reinforced thermoplastic parts.

The OneUp ISCG05 doesn't provide chain retention but what it does provide is a level of chain bash protection in the form of an easy to install add-on to your existing chain guide. 

The Underbash is compatible with chainrings from 28-36T and includes 3 different sizes of bash plate. Suits frames with 2 ISCG05 tabs only (Evil, Rocky Mountain, etc).

NOTE: The OneUp ISCG05 Underbash should not be used on frames with 3 ISCG05 tabs. 


  • Easy installation, no crank removal required.
  • Only a single tool is required for installation and adjustment.
  • Oval and Boost compatible.
  • High-quality Stainless Steel hardware 
  • Includes 3 bash plate sizes (28-30T, 32-34T, 36T)


  • Weight: 68g (32-34T)
  • Chainring capacity: 28-36T 
  • Chainline: 2.5mm adjustment 
  • Mounting: 2 Bolt ISCG05 ONLY
  • Colour: Black
  • Material: 7075 aluminum, glass reinforced thermoplastic
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