Shimano Tourney RD-TX800
Reliable Indexing. Rugged Build.
The Shimano RD-TX800 is built to handle the rigors of daily use. Whether you are navigating city potholes or light gravel paths, the TX800 delivers consistent, predictable gear changes. Its Double Servo-Pylon technology keeps the upper pulley at a constant distance from each cog, resulting in faster, more accurate shifts across the entire cassette.
Why the RD-TX800 is Smart Value:
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Double Servo-Pylon Technology: Ensures the derailleur moves in an optimized path, keeping the guide pulley close to the cogs for crisp, "snap-to" shifting.
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Large 13-Tooth Pulleys: The oversized 13T tension and guide pulleys reduce friction and chain wrap stress, resulting in a quieter drivetrain and longer pulley life.
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Wide-Range Compatibility: Designed to handle "MegaRange" cassettes with up to a 34T low gear, giving you the mechanical advantage needed to conquer steep neighborhood hills.
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Durable Alloy & Steel Construction: Features a robust body designed to withstand the occasional bump or tip-over, making it ideal for commuters and younger riders.
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Smooth, Light Action: Engineered with a spring tension that provides easy shifting at the lever—perfect for those using twist shifters or entry-level trigger shifters.
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Universal 7/8-Speed Fit: Works flawlessly with all Shimano SIS (Shimano Index System) 7Speed and 8Speed drivetrains.
Technical Specifications:
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Speeds: 7 / 8Speed
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Max Low Sprocket: 34T
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Min Low Sprocket: 28T
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Top Sprocket: 11T
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Total Capacity: 43T
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Mounting: Standard Hanger Mount (B-Axle)
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Weight: Robust and Reliable (approx. 315g)
The Alegro Perspective: In the shop, we call the TX800 the "Old Faithful." When a customer comes in with a bent or sluggish entry-level derailleur, this is our go-to replacement. It is remarkably easy to tune and stays in adjustment much better than unbranded alternatives. If you want to restore that "new bike" feel to your 7 or 8Speed rig without spending more than the bike is worth, the TX800 is the most cost-effective performance boost you can buy.
Crisp Shifting. Affordable Durability. Restore your Ride with Shimano.