What role does the nitrogen charge in the rear shock play in the operation of the shock? Does it help in rebound, comperssion or both? Just curious how it works.
1. The bladder acts as kind of a "spring" forcing the small amount of oil passing through the compression "clicker" valve back into the shock body.
2. The pressure increases the sealing ability of the oil seal on the shock shaft
3. It prevents [or at least minimizes] cavitation [and foaming] of the oil as it passes through the internal valving.