The Underbash is a simple and lightweight way to protect your chainring from rock strikes. With three interchangeable bash plates for 28-36T chainrings, it’s designed for frames with 2 ISCG05 tabs and built to handle hard hits without too much bulk.

Underbash Setup Instructions

1. Hold backplate directly against ISCG05 tabs. Check for clearance between the back side of the bashplate and the bike frame (use included 2.5mm spacers if necessary to space the backplate away from the frame).
2. Rotate backplate to desired location and torque bolts to 5Nm

Bash Replacement Instructions

1. Remove Underbash from bike
2. Remove bolt retaining clip from rear bash plate bolt by pushing a 4mm hex through the bolt from the backside of the Underbash
3. Remove Bash bolts using a 5mm hex
4. Select desired bash plate and reinstall bash bolts to 6Nm
5. Reinstall bolt retaining clip on the rear bash plate bolt
6. Reinstall Underbash onto bike