10BRF  (BNT1865  Spool Tension Spring)

Genuine Shimano Spool Tension Spring (part #10BRF, BNT1865) — this spring works within the cast control mechanism to apply adjustable pressure against the spool shaft, letting you fine-tune spool tension for backlash-free casting. If the spring weakens, bends, or breaks, turning the cast control knob will have no effect, leaving you unable to regulate spool speed and resulting in frequent overruns. Cross-references with Shimano part numbers 10BRF and BNT1865. OEM replacement ensures perfect fit and factory performance. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano reel parts.