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    ChoiceComparer.comChoiceComparer.com
    CategoriesHow We RankBest Deals

    Top 10 Best bike derailleur in 2026

    Last Updated - 6/30/2026
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    bike derailleur
    🏆Best Choice
    1
    Relwears Tourney Rear Derailleur RD-TY300 6/7Speed Rear Derailleur Direct Mount for Mountain Bike Road Bike Snowmobile Trail Bike
    Relwears

    Relwears Tourney Rear Derailleur RD-TY300 6/7Speed Rear Derailleur Direct Mount for Mountain Bike Road Bike Snowmobile Trail Bike

    9.8
    ChoiceComparer.com Score
    9.8
    / 10
    Outstanding

    Main highlights

    • •【Model】RD-TY300-SGS; Bike 6/7 Speed Rear Derailleur for most kinds of bikes like mountain bike, hybrid bike, kids bike, cruiser bike etc.
    • •【Features】Smooth shifting, 6/7 speed derailleur is easy and fast to install. Bracket fit (under wheel nut) Long cage tourney derailleur, total capacity 43T, pulley/Teeth 13/13T. Low sprocket: Max. 34T; Low sprocket: Min. 28T; Top sprocket: Max. 14T; Top sprocket: Min. 11T.
    • •【Type】Long cage tourney derailleur, RD-TY300-SGS 6/7 speed derailleur is compatible with 11T /14T high speed gear.
    • •【 Stability】Made of high quality durable aluminum alloy material and come with excellent shifting performance ensure your safe and stable while riding.
    • •【Application】RD-TY300-SGS is compatible with 6 and 7-speed SIS INDEX variable speed transmission systems. Suitable for MTB, mountain bikes, road bikes, folding bicycles, commuter bikes, tricycles, eletric bikes etc.
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    View offer on:
    Amazon
    $19.99
    $21.99
    -9%
    Check Price
    2
    Inkesky RD-TZ31-GS 6/7 Speed Rear Derailleur with Direct Mount, Medium Cage, for Mountain Bike
    Inkesky

    Inkesky RD-TZ31-GS 6/7 Speed Rear Derailleur with Direct Mount, Medium Cage, for Mountain Bike

    9.7
    ChoiceComparer.com Score
    9.7
    / 10
    Outstanding

    Main highlights

    • •[IMPORTANT] It's Direct Mount Rear Derailleur for Mountain Bike, not Hanger mount
    View offer on:
    Amazon
    $16.38
    Check Price
    3
    RD-TY21B 6/7 Speed Direct Mount Derailleur for Mountain Tricycle Commuter Cruiser Bike
    Relwears

    RD-TY21B 6/7 Speed Direct Mount Derailleur for Mountain Tricycle Commuter Cruiser Bike

    9.5
    ChoiceComparer.com Score
    9.5
    / 10
    Outstanding

    Main highlights

    • •MODEL: RD-TY21B; Bike rear derailleur is compatible with 6/7 speed most kinds of bikes.
    • •PERFORMANCE: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.
    • •WIDE APPLICATION: This bicycle transmission is Suitable for MTB, mountain bikes, commuter bike, cruiser bike, folding bike etc.
    • •NOTE: The bike rear derailleur is direct mount, not hanger mount .Please check the mount type of the original part before purchasing. If you have any questions, please feel free to contact us, we will provide you with professional services.
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    View offer on:
    Amazon
    $16.99
    $22.99
    -26%
    Check Price
    4
    Rear Derailleur RD-TZ31A 6/7 Speed Direct Mount Derailleur for Mountain Bike Tricycle Commuter Bike Cruiser Bike
    Relwears

    Rear Derailleur RD-TZ31A 6/7 Speed Direct Mount Derailleur for Mountain Bike Tricycle Commuter Bike Cruiser Bike

    9.4
    ChoiceComparer.com Score
    9.4
    / 10
    Excellent

    Main highlights

    • •MODEL: RD-TZ31A Direct Mount Rear Derailleur,Suitable for 6/7speed.
    • •STABILITY: Durable aluminum alloy material and excellent shifting performance ensure safe and stable ridin
    • •PRECISE ADJUSTMENT: High-hardness aluminum alloy body adjustment, adjustment is more precise. It can be adjusted slightly in multiple places to ensure accurate speed change performance.
    • •MUE GUIDE WHEEL: PA nylon wear-resistant aluminum alloy guide wheel, silent, smooth and no abrading for chain.
    • •INSTALLATION:Fast and convenient installation and easy maintenance.(Note:The bike rear derailleur is direct mount,not hanger mount .Please check the mount type of the original part before ordering.)
    • •SCOPE OF APPLICATION:Suitable for mountain bikes, station wagons, folding bikes, etc.If you have any questions,please feel free to contact us.
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    View offer on:
    Amazon
    $16.88
    Check Price
    5
    Relwears Altus RD-M310 Rear Derailleur 7/8 Speed Bike Rear Derailleur Direct Mount for Mountain Bike Road Bike Most Models
    Relwears

    Relwears Altus RD-M310 Rear Derailleur 7/8 Speed Bike Rear Derailleur Direct Mount for Mountain Bike Road Bike Most Models

    9.2
    ChoiceComparer.com Score
    9.2
    / 10
    Excellent

    Main highlights

    • •【Engineered for Multi-Speed Bikes】 The RD-M310 7/8 speed bike rear derailleur, featuring high-performance RD-CT95 Altus technology, compatible with 7/8 speeds, delivers a smooth riding experience, perfect for your biking adventures. Offers superior performance and reliability, suitable for everyday and light mountain biking
    • •【Lightweight Design】 Designed to be lightweight, reducing bike weight, enhancing speed and maneuverability, ideal for leisure cyclists and urban riders who demand reliable performance. Suitable for those with certain performance requirements for their bikes
    • •【Strong Adaptability】RD-M310 7/8 speed derailleur with a maximum rear sprocket of 34T and total capacity of 43T, it adapts to various riding needs, ensuring easy handling on different terrains
    • •【Versatile Application】 Fits various bike types including mountain, road, racing, city, and folding bikes, adding versatility to your cycling experience
    • •【Easy Installation】 Direct installation onto the bike's rear, avoiding the hassle of rack mounting. Make sure to choose the correct installation method before purchase 7/8 speed derailleur
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    View offer on:
    Amazon
    $27.99
    $32.99
    -15%
    Check Price
    6
    Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage
    SHIMANO

    Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage

    9.1
    ChoiceComparer.com Score
    9.1
    / 10
    Excellent

    Main highlights

    • •Chain Wrap Capacity: 43teeth, Derailleur Action: Top-Normal (Traditional)
    • •Derailleur Color: black, Drivetrain Spacing: Shimano/SRAM 8, Largest Cog: 34teeth
    • •Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 326g
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    View offer on:
    Amazon
    $24.98
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    7
    Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger
    SHIMANO

    Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger

    8.9
    ChoiceComparer.com Score
    8.9
    / 10
    Great

    Main highlights

    • •TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cage
    • •Double Servo enables the guide pulley to track the cogs closely while moving front to back, optimizing each shift
    • •Designed to keep the rear derailleur guide pulley at an optimum distance from each sprocket for accurate SIS shifting
    • •13t upper and lower pulleys
    • •Compatible with HG 6/7/8 speed chains
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    View offer on:
    Amazon
    $18.05
    $20.75
    -13%
    Check Price
    8
    Huazu Rear Derailleur 6/7-Speed for Tourney RD-TY300 Mountain Bikes-Smooth Shifting Direct Mount Design
    Huazu

    Huazu Rear Derailleur 6/7-Speed for Tourney RD-TY300 Mountain Bikes-Smooth Shifting Direct Mount Design

    8.8
    ChoiceComparer.com Score
    8.8
    / 10
    Great

    Main highlights

    • •Optimal Performance: Long cage design accommodates up to 34T cassette - Total Capacity 43T, pulley/Teeth 13/13T.
    • •Built to Last: High-Quality Aluminum Alloy Construction with Hollow Weight-Reduction Design. Nylon wear-resistant aluminum alloy guide wheel for silent, smooth, and non-wearing chain.
    • •Smooth and Effortless Shifting: SIS Index Technology and Double Servo-Panta Mechanism(Enables the rear derailleur to move in an optimum path)for Stress-Free Riding
    • •Precise and Reliable: Compatible with 6 and 7-speed SIS INDEX transmission systems. Optimized guide pulley ensures precise shifting for accurate SIS performance. Suitable for Mountain, Road, and Touring Bikes.
    • •Easy Installation and Maintenance: Direct Mounting Design for Fast and Convenient Setup.It can be adjusted slightly in multiple places to ensure accurate speed change performance.
    Show more
    View offer on:
    Amazon
    $17.99
    Check Price
    9
    Shimano Tourney RD-TY300-SGS 6/7-Speed Mountain Bicycle Rear Derailleur , Black, One Size
    SHIMANO

    Shimano Tourney RD-TY300-SGS 6/7-Speed Mountain Bicycle Rear Derailleur , Black, One Size

    8.6
    ChoiceComparer.com Score
    8.6
    / 10
    Good

    Main highlights

    • •Shimano TX35 6 / 7-speed rear derailleur (bracket attachment)
    • •SIS rear index shifting
    • •SGS cage can handle wide range gearing and 34 tooth sprockets
    • •13 tooth pulleys offer long service life and less noise
    Show more
    View offer on:
    Amazon
    $16.21
    $18.99
    -15%
    Check Price
    10
    SHIMANO Tourney TX55 6/7 SPD Rear Derailleur Direct
    SHIMANO

    SHIMANO Tourney TX55 6/7 SPD Rear Derailleur Direct

    8.5
    ChoiceComparer.com Score
    8.5
    / 10
    Good

    Main highlights

    • •Compatible with 6 or 7 speed cassettes and freewheels
    • •Direct Mount
    Show more
    View offer on:
    Amazon
    $17.99
    Check Price
    📊

    📈 How we rank

    With our cutting-edge technology, we examine thousands of products and retailers, assessing reviews, ratings, trends, and sales rankings to identify what matters most to users like you.

    Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.

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    ChoiceComparer.comChoiceComparer.com

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