While the Rock And Roll trainer can't be locked out completely from sagging or bouncing while riding (especially with heavier riders), there are a couple of steps you can take to minimize the sag:
- Be sure your Rock And Roll is on firm flooring, carpet can worsen sag.
- Loosen tension bolt closest to the bike a turn or so
- Tighten tension bolt furthest from bike by at least an extra turn, sometimes 2 or more turns are necessary to get the sag under control
- Finally, be sure your bike tire is centered on the roller by adjusting the left or right cone cups accordingly, this will help any leaning issues as well.