The 9point8™ Slack-R™ kit changes the head tube angle on bikes with IS headsets. (IS41 and IS42* upper bearing and IS52 lower bearing only.)
CLICK HERE FOR MORE INFO ON IS41 vs IS42 vs IS42S
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Everything you loved about the 9point8 Digit but better.
The 9Point8 Fall line is an exceptional post, and a favourite for those who love high build quality.