Chainguide OneUp Components Bash ISCG05Chainguide OneUp Components Bash ISCG05 Eliminate dropped chains forever with the new OneUp Components Bash Guide. As the trend for lower and slacker bikes continues, chainring protection is becoming even more important. Revised for 2019 the OneUp Bash Guide uses simple, one tool installation and adjustment as well as an all new tool less flip The OneUp Bash Guide was developed with input from top EWS World racers and can be seen all over this years