FSA NO.69/SRS 1.5″~1.5″ w/H2055-15mm w/o Compression. The FSA NO.69/SRS 1.5″~1.5″ headset is tailored for frames with straight 1.5″ head tubes delivering solid steering precision and bearing longevity. Its robust construction and smooth operation make it suitable for demanding road and MTB use. This headset is a practical upgrade for riders seeking reliability and compatibility with oversized steerer tubes.