What Our Gearhead(R) Experts Are Saying:"I recently upgraded my bike with this rear derailleur, and the difference is night and day. It handles rugged trails and steep climbs with ease. The wide cage accommodates a variety of cassette sizes, making it versatile for different terrains. " We embark on thrilling rides with the Three Prime 9 X-Wide Rear Derailleur by Box Components, knowing it will deliver precise and smooth shifting. Whether we're tackling steep mountain trails or cruising through flat paths, this derailleur ensures our bike adapts to every challenge. Box Components crafted this derailleur with a focus on durability and performance. The long cage design supports a wide range of cassettes, while the robust construction withstands the demands of rugged terrains. We trust it to keep us rolling smoothly on all our adventures.