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    Bike

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    Box®

    PREORDER

    Box One-E 9S Derailleur

    Rp 1.773.954

    Best for

    race-focused BMX riders

    Race class

    Confirm by rider size

    NOT SURE WHICH SIZE FITS?SIZE GUIDE →
    QTY
    1
    ~14 day ETA
    Send height & class for fit check

    Fit checked before shipping · Mechanic support via WhatsApp · Authorized dealer sourcing

    100% Secure Transaction

    VISAMASTERCARDAMEXPAYPALGOPAYOVODANAQRIS

    Live Stock

    Inventory updated daily. Items in stock ship the next business day.

    Fast Delivery

    We use trusted couriers to make sure your order arrives safely and on time.

    Secure Payments

    100% secure transaction. We never share your information with third parties.

    Satisfaction Guarantee

    Every item is checked before shipment. Return within 10 business days if unsatisfied.

    Preorder terms

    Clear timing before you commit.

    Estimated arrival

    09 Sep 2026 target

    Payment

    Full payment or WhatsApp-assisted

    Cancellation

    Cancelable before supplier confirmation

    Ship-out

    ~14 business days after order

    Fit & geometry

    Will this fit me?

    Race class

    Confirm by rider size

    Rider height

    Top tube

    Check geometry/spec table before ordering

    Wheel size

    Material

    Skill level

    developing BMX racers

    Setup context

    Race-ready checks

    Crank length

    Gear ratio

    Confirm chainring and cog setup

    Brake type

    Confirm brake standard

    Pedal setup

    Confirm included pedal/clipless preference

    Track recommendation

    Best for club racing and skill progression.

    Next step

    Still unsure?

    Recommended upgrades

    Complete the race setup

    Gearing

    Confirm chainring/cog ratio for your local track before checkout.

    Contact points

    Review pedals, grips, and saddle setup for gate-start confidence.

    Protection

    Pair the build with race helmet, gloves, and body protection.

    Product info

    About This Product

    *:first-child { margin-top: 0; } .map-popup > *:last-child { margin-bottom: 0; } .map-popup.open { opacity: 1; visibility: visible; } .marker { position: absolute; z-index: 1; display: inline-block; width: 10px; height: 10px; color: #000; line-height: 66px; text-align: center; text-decoration: none; border-radius: 50%; background-color: white; border-style: solid; border-width: 1px; transition: all 300ms; } .marker1 { top: 20%; left: 35%; } .marker2 { top: 40%; left: 60%; } .marker3 { top: 78%; left: 25%; } .marker4 { top: 78%; left: 25%; } .marker5 { top: 78%; left: 25%; } .marker6 { top: 78%; left: 25%; } .marker7 { top: 78%; left: 25%; } .map-item8 { top: 35%; left: 71%; } .map-item9 { top: 30%; left: 83%; } @media only screen and (max-width:48em) { .marker1,.marker2, .marker3, .marker4, .marker5,.marker6,.marker7,.marker8,.marker9{ display:none; } } @media only screen and (min-width:48em) { .map-item { position: absolute; width: 80px; height: 70px; } .map-item .marker { top: auto; left: auto; } .map-item1 { top: 66%; left: 11%; } .map-item2 { top: 59%; left: 17%; } .map-item3 { top: 50%; left: 24%; } .map-item4 { top: 44%; left: 32%; } .map-item5 { top: 43%; left: 41%; } .map-item6 { top: 38%; left: 48%; } .map-item7 { top: 36%; left: 58%; } .map-item8 { top: 35%; left: 71%; } .map-item9 { top: 30%; left: 83%; } .map-popup { position: absolute; left: -137px; width: 280px; transform: translateY(-155%); border-radius: 3px; } .map-popup:before { content: ""; position: absolute; top: 90%; left: 45%; margin-top: 16px; width: 0; height: 0; border-style: solid; border-width: 16px 16px 0 16px; border-color: #fff transparent transparent transparent; } .map-popup.edge { left: auto; right: calc(100% + 24px); } .map-popup.edge:before { left: auto; right: -16px; border-width: 16px 0 16px 16px; border-color: transparent transparent transparent #fff; } } --> ADJUSTMENT SCREW Changes the preload force applied to the disc springs. DISC SPRINGS Applies modulated pressure to the friction discs PRESSURE PLATE Provides rotational resistance by the use of friction FRICTION DISC Provides rotational resistance by the use of friction FRICTION PLATE Provides rotational resistance by the use of friction FRICTION DISC Provides rotational resistance by the use of friction CLUTCH BEARING HOUSING Houses the clutch bearing and engages the friction plate CLUTCH BEARING Operates in a single direction SHAFT Engages clutch bearing and translates torque to cage Adjustable Tri-Pack Limited Slip Clutch™ The Adjustable Tri-Pack limited slip clutch™ is an innovative chain damper that vastly reduces derailleur cage bounce and chain slap. The system also maintains tension for better chain wrap. At its core is a clutch pack, that is capable of providing a large amount of force in a small package. Clutch force can be adjusted to give the user the ability to tune their setup to the desired balance of shifter feel and chain retention. This version is also serviceable. Durable 3D Forged Linkages Impact resistance is greatly improved by way of forging — a key manufacturing process that strengthens critical components. Tested at the premier freeride event of the season — Red Bull® Rampage — this new construction has proven itself capable of performing at the highest level. Pivot-Tech™ Impact resistant, spring-loaded cable stay keeps cable, housing & you out of harm’s way. FAQ How is the Ebike variant different? Are Box derailleurs compatible with Shimano "direct mount" hangers? No. Shimano direct mount hangers are proprietary and are not compatible with Box derailleurs. Standard Mount vs. Direct Mount Derailleur Hangers How do I make adjustments to the derailleur? View & download instructions here: PDF File How do I size the chain properly? View & download instructions here: PDF File Q: Can I install this on my bike that uses a b-link for my current derailleur? A: Yes! All you need to do is remove your old derailleur and the b-link leaving the standard hanger attached to your bike frame. You can now mount your Box Components derailleur directly to the hanger on your frame. Q: Can I install this on my bike that currently has a direct mount hanger ? A: Possibly, you will need to see if your frame manufacturer or a third party like wheelsMFG offers a standard mount hanger for your frame.

    100% Original Product
    Fast Shipping
    Pro Assembly
    24/7 WhatsApp Support
    Secure Checkout
    Global Sourcing

    MISSION BRIEF ///

    *:first-child { margin-top: 0; } .map-popup > *:last-child { margin-bottom: 0; } .map-popup.open { opacity: 1; visibility: visible; } .marker { position: absolute; z-index: 1; display: inline-block; width: 10px; height: 10px; color: #000; line-height: 66px; text-align: center; text-decoration: none; border-radius: 50%; background-color: white; border-style: solid; border-width: 1px; transition: all 300ms; } .marker1 { top: 20%; left: 35%; } .marker2 { top: 40%; left: 60%; } .marker3 { top: 78%; left: 25%; } .marker4 { top: 78%; left: 25%; } .marker5 { top: 78%; left: 25%; } .marker6 { top: 78%; left: 25%; } .marker7 { top: 78%; left: 25%; } .map-item8 { top: 35%; left: 71%; } .map-item9 { top: 30%; left: 83%; } @media only screen and (max-width:48em) { .marker1,.marker2, .marker3, .marker4, .marker5,.marker6,.marker7,.marker8,.marker9{ display:none; } } @media only screen and (min-width:48em) { .map-item { position: absolute; width: 80px; height: 70px; } .map-item .marker { top: auto; left: auto; } .map-item1 { top: 66%; left: 11%; } .map-item2 { top: 59%; left: 17%; } .map-item3 { top: 50%; left: 24%; } .map-item4 { top: 44%; left: 32%; } .map-item5 { top: 43%; left: 41%; } .map-item6 { top: 38%; left: 48%; } .map-item7 { top: 36%; left: 58%; } .map-item8 { top: 35%; left: 71%; } .map-item9 { top: 30%; left: 83%; } .map-popup { position: absolute; left: -137px; width: 280px; transform: translateY(-155%); border-radius: 3px; } .map-popup:before { content: ""; position: absolute; top: 90%; left: 45%; margin-top: 16px; width: 0; height: 0; border-style: solid; border-width: 16px 16px 0 16px; border-color: #fff transparent transparent transparent; } .map-popup.edge { left: auto; right: calc(100% + 24px); } .map-popup.edge:before { left: auto; right: -16px; border-width: 16px 0 16px 16px; border-color: transparent transparent transparent #fff; } } --> ADJUSTMENT SCREW Changes the preload force applied to the disc springs. DISC SPRINGS Applies modulated pressure to the friction discs PRESSURE PLATE Provides rotational resistance by the use of friction FRICTION DISC Provides rotational resistance by the use of friction FRICTION PLATE Provides rotational resistance by the use of friction FRICTION DISC Provides rotational resistance by the use of friction CLUTCH BEARING HOUSING Houses the clutch bearing and engages the friction plate CLUTCH BEARING Operates in a single direction SHAFT Engages clutch bearing and translates torque to cage Adjustable Tri-Pack Limited Slip Clutch™ The Adjustable Tri-Pack limited slip clutch™ is an innovative chain damper that vastly reduces derailleur cage bounce and chain slap. The system also maintains tension for better chain wrap. At its core is a clutch pack, that is capable of providing a large amount of force in a small package. Clutch force can be adjusted to give the user the ability to tune their setup to the desired balance of shifter feel and chain retention. This version is also serviceable. Durable 3D Forged Linkages Impact resistance is greatly improved by way of forging — a key manufacturing process that strengthens critical components. Tested at the premier freeride event of the season — Red Bull® Rampage — this new construction has proven itself capable of performing at the highest level. Pivot-Tech™ Impact resistant, spring-loaded cable stay keeps cable, housing & you out of harm’s way. FAQ How is the Ebike variant different? Are Box derailleurs compatible with Shimano "direct mount" hangers? No. Shimano direct mount hangers are proprietary and are not compatible with Box derailleurs. Standard Mount vs. Direct Mount Derailleur Hangers How do I make adjustments to the derailleur? View & download instructions here: PDF File How do I size the chain properly? View & download instructions here: PDF File Q: Can I install this on my bike that uses a b-link for my current derailleur? A: Yes! All you need to do is remove your old derailleur and the b-link leaving the standard hanger attached to your bike frame. You can now mount your Box Components derailleur directly to the hanger on your frame. Q: Can I install this on my bike that currently has a direct mount hanger ? A: Possibly, you will need to see if your frame manufacturer or a third party like wheelsMFG offers a standard mount hanger for your frame.

    +COMPLETE YOUR SETUP

    Box One-E 9S Derailleur

    THIS ITEM

    Box One-E 9S Derailleur

    Rp 1.773.954

    COMBINED TOTAL

    Rp 4.333.919

    Preorder each separately via WhatsApp for bundle deals

    ASK BUNDLE PRICE

    Box One-E 9S Derailleur

    Rp 1.773.954