Shimano Housing Stop Adaptors (Flat Back) for STI (downtube bosses) Pair

Shimano Down Tube Housing Stop Adaptor

Fits standard downtube shfiter bosses. Includes adjusting barrels for fine-tuning indexed shifting.

This version has a flat back that fits against the flat shifter mount bases of most aluminum and carbon frames that have downtube shifter mounts.

Sold as pair.