The redesigned internal structure of Ultegra FD features InfinityXross technology, which extends the cold-pressed HAGANE gear tooth surface, distributing force load over a wider area to prevent stress points and reduce wear, enhancing the reel’s longevity.
Shimano Ultegra 4000 XG FD Spinning Reel – (ULT4000XGD)
The redesigned internal structure of Ultegra FD features InfinityXross technology, which extends the cold-pressed HAGANE gear tooth surface, distributing force load over a wider area to prevent stress points and reduce wear, enhancing the reel’s longevity.