How to adjust shock preload?

dhdallas · 03-15-2026, 10:06 AM

These are Noleen NR-1 shocks on an old Girvin ProFlex MTB. How do I get a grip on the preload adjuster? There is very little surface area & there are no notches for a typical spanner & a pipe wrench, vice grips, etc. which are sure to mar the springs if I can even get them in there to grip it. The working space on the fork shock is especially tight. See attachment photos. Thanks!

ReapThaWhirlwind · 03-17-2026, 08:42 PM

You see that thread?

Screw that thread in (clockwise) to compress the shock and increase the pretension.

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