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sag is only acceptable on the bike not the helperMEASURING RIDER SAG AND SPRING SELECTION  

This is a two person operation.

 Measuring rider sag can be done as follows:   





  1. Put the bike on a stand with both wheels off the ground.
  2. Measure R1 from the center of the rear axle vertically to a fixed point on the back of the bike, such as a muffler bolt, fender bolt, or a specific point on the rear fender. Mark the fixed point for future reference.
  3. Take the bike off the stand and sit on it in your normal riding position; body to the front of the seat and head over the top triple clamp.  Keep your feet on the ground with just enough weight on your feet to balance the bike.
  4. Have the other person measure R3 from the center of the axle of the previously marked fixed point.
  5. Calculate rider sag by subtracting the smaller from the larger measurement.
  6. Adjust as necessary to achieve the recommended rider sag.


The rider sag recommended above should be used as a guide.  A different sag level may be appropriate due to differing riding styles, ability levels and riding conditions.  Most manufacturers use 1/3 of total suspension travel for a starting point; a typical standard rider sag is usually 100-105mm. 






Springs - Most manufacturers target medium rider weight is around 170-175 lbs.  So, if your weight is in that range you have a good chance of using the standard shock spring.  If you’re heavier, getting the appropriate sag numbers will require excessive tension on the spring and will result in harsh feedback on sharp edge bumps (roots and rocks) and inappropriate front/rear balance causing the front to dive and steer too quickly. 




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