The Box Three tier delivers many of the same capabilities of its more famous siblings yet it's built upon a simpler platform. Cassettes are accessible at 11-50T & fashioned without spiders. The derailleur exploits our Limited Slip clutch technology without the Tri-pack features. Shift easily with a comparable mechanism, although you'll forgo the hinged clamp & die-cast structure. & lastly, string it all together with a Prime 9 chain but without extravagant coatings. If you're looking to bring your 2/3 by bike into the 21st century, then level up with this group! Box Three Prime 9 Cassette The Box Three cassette draws from both of its Box One & Box Two siblings to create a sensible all-rounder. All cogs are stamped from steel & subsequently, the larger ones are pinned to steel spiders. The main difference here versus Box Two is the use of additional weight-reducing holes on the cogs.

Features:
Material: Aluminum, Cold Rolled Steel Gear Ratio: 11
- 13
- 15
- 18
- 22
- 28
- 34
- 42
- 50 Box's Best All-Rounder Cassette Steel Stamped Cogs Steel Stamped Spiders Ultra-Wide Ratio with Consistent Progression Prime 9 Technology™ Compatible with HG Freehub Bodies Weight: 660g Box Three Prime 9 126 Link Chain Polished The Box Three chain is polished & then chemically treated to achieve a basic level of corrosion resistance. All Prime 9 chains have chamfered shifting edges, solid plates & solid pins to safeguard durability. Our unique inner link spacing is engineered to grab those modern wide/narrow chainrings. We chose to modernize the 9-speed platform due to the chain's spirited reputation.

Features:
Material: Hardened Alloy Steel Durable Hardened Solid Pin Prime 9 Technology Compatible with Modern Wide/ Narrow Chainrings Weight: 312g Box Three Prime 9 X-Wide Rear Derailleur The Box Three Rear Derailleur simplifies the features found on the Prime 9 Box One & Two rear derailleurs making for a fully-featured wallet-friendly rear derailleur. Including a Limited Slip Clutch, Sealed bearing pulleys & a solid construction Box Three Rear derailleurs are compatible with 11-46 & 11-50t derailleurs making it one of the most versatile derailleur offerings for Prime 9.

Features:
Material: Aluminum, Glass Fibre / Nylon Composite, Steel Box's Best All-Rounder Derailleur Limited Slip Clutch™ Bearing Pulleys Nylon Composite Knuckle Direct Channel Cable Stay Die Cast Linkages Stamped Inner & Outer Cage Prime 9 Technology Compatible with Standard Derailleur Hangers (Non Direct-Mount) Weight: 349g Box Three Prime 9 Shifter The Box Three shifter makes good use of nylon composites in both top & bottom shells as well as the levers. Box Three is our performance & value tier. So this shifter sheds all the fancy trappings of the top 2 tiers but maintains their shifting characteristics. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, & reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. & the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up.

Features:
Material: Glass Fibre / Nylon Composite, Steel Box's Best All-Rounder Shifter Extruded Clamp 2 Piece Pull Lever / Up to 3 Gears Per Shift Resin Top Shell Fast Action Release Lever Prime 9 Technology Weight: 128g Compatibility: • Multi Shift Option Not Intended for E-Bike Use • Single Shift Option Recommended for E-Bike Use FAQ: SHIFTER Does the Box Three Prime 9 Shifter come with a cable? Yes. All Box Three Twin Lever Shifters come with a stainless steel shift cable. How do I remove the cap from the cable port to install a new cable? To remove it, use a Phillips head screwdriver & turn it counter-clockwise a quarter turn You can then push the cap out by applying pressure to the cable from the other side. Please Note: The Cable Port is not a screw that un-threads from the cable port, if you turn the cable port screw more than 90 degrees damage may occur. Is the Box Three Prime 9 Shifter compatible with other 9 speed derailleurs? No, traditional 9 speed systems use a Cable Pull that is not compatible with prime 9. DERAILLEUR Are Box Prime 9 derailleurs compatible with Shimano "direct mount" hangers? No, Shimano direct mount hangers are proprietary & are not compatible with Box derailleurs. Is the Box Three Prime 9 Derailleur compatible with other 9 speed components? No, traditional 9 speed systems use a Cable Pull that is not compatible with Prime 9. Are Box Prime 9 derailleurs compatible with drop bar (road) shifters? No, Box Prime 9 derailleurs are not currently compatible with drop bar shifters, but we do offer a clamp for our shifters to mount on some 31.8mm drop handle bars. How should I clean my Box Three Prime 9 derailleur? We suggest removing the derailleur from the bike & using a soft bristle brush or rag with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. How do I make adjustments to the derailleur? Please see our installation video at boxcomponents.com/service CASSETTE Will the Box Three Prime 9 Cassette fit on an wheel with a Sram XD Driver? No this will only work with a HG splined Shimano 9-10-11 speed freehub body. Is the Box Three Prime 9 Cassette compatible with other 9 speed drivetrains? No, The Box Three Prime 9 Cassette is optimized for Box Prime 9 drivetrains & running other component variations can result in poor performance. How should I clean my Box Three Prime 9 Cassette? We suggest removing the cassette from the wheel & using a soft bristle brush with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. CHAIN Is the Box Three Prime 9 Chain compatible with other 9 speed drivetrains? Yes, All Box prime 9 chains have standard external geometry that will work with most existing 9 speed drivetrains. Is the Box Three Prime 9 Chain Compatible with any wide narrow chainring? No, Box Prime 9 chains are compatible with most 11-speed wide narrow chainrings but there are some chainrings that can result in poor performance. We recommend the following 11 speed wide/narrow chainrings for best performance, Wolftooth Components, Raceface, One Up Components, Absolute Black. How should I clean my Box Two Prime 9 Chain? We suggest removing the chain from the bike & using a soft bristle brush or rag with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating.



















...

This Box Two cassette was where Prime 9 started. Originally conceived as an E-MTB product to deliver long service life & extra range over fewer gears, Box quickly grew to enjoy its abilities on unpowered MTBs. All of this model's cogs are stamped from steel & subsequently, the larger ones are pinned to alloy spiders. Due to its provenance, this is, without doubt, the most durable cassette in the range. Compatibility: • Box One Prime 9 Chain 126L DLC Black • Box Two Prime 9 126 Link Chain Nickel • Box Three Prime 9 126 Link Chain Polished • Box One Prime 9 Rear Derailleur • Box Two Prime 9 X-Wide Rear Derailleur Black • Box Three Prime 9 X-Wide Rear Derailleur Black • Box One Prime 9 Shifter Black • Box Two Prime 9 Shifter Black • Box Three Prime 9 Shifter Black FAQ: Will the Box Two Prime 9 Cassette fit on an wheel with a Sram XD Driver? No this will only work with a HG splined Shimano 9-10-11 speed freehub body Is the Box Two Prime 9 Cassette compatible with other 9 speed drivetrains? No, The Box Two Prime 9 Cassette is optimized for Box Prime 9 drivetrains & running other component variations can result in poor performance. How should I clean my Two Prime 9 Cassette? We suggest removing the cassette from the wheel & using a soft bristle brush with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. ...

The Box Two groupset delivers similar performance to the top-tier Box One without the costly features. You still get the Tri-Pack (TM) Clutch in the rear mech only it isn't adjustable. The cassette's 11-50T range is equally impressive & the action on the shifter is just as snappy although you don't get the rigid die-cast pull lever. Completing this groupset is its high-quality chain, which boasts impressive torque power & speed as you explore the trails on your mountain bike. Box Two Prime 9 Shifter The Box Two shifter is the only shifter on the market (other than our Box One) that comes factory stock with a hinged clamp. Box Two is our performance tier so this shifter still maintains the durable cast aluminum top shell but trades out the Box One's 1-piece pull-lever for a 2-piece resin & steel variant. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, & reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. & the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up.

Features:

Material: Glass Fibre / Nylon Composite, Steel, Aluminum Alloy with Matte Onyx finish Hinged & Extruded Clamp 2 pc Pull Lever / Up to 3 Gears Per Shift* (two options available to select) Die Cast Top Shell Fast Action Release Lever Prime 9 Technology Multi Shift Option Not Intended for E-Bike Use Single Shift Option Recommended for E-Bike Use Weight 135g Box Two Prime 9 X-Wide Rear Derailleur The Box Two Prime 9 Rear Derailleur is very similar to the Box One version however, to be more wallet-friendly, it offers a non-adjustable Tri-Pack™ Clutch, bushing pulleys, & some muted finishes. Box Two rear derailleurs are still optimized for 11-50t cassettes & offer durability & performance for the most demanding terrain, just at a lower price!

Features:

Material: Stainless Steel, Hardened Alloy Steel with Matte Onyx finish Tri-Pack Limited Slip Clutch Sealed Bushings Pulleys Nylon Composite Knuckle Pivot-Tech Cable Stay Durable 3D Forged Linkages Forged Inner & Outer Cage Prime 9 Technology Compatible with Standard Derailleur Hangers (Non Direct-Mount) Weight: 290g Box Two Prime 9 11-50T Cassette The Box Two cassette was where Prime 9 started. Originally conceived as an E-MTB product to deliver long service life & extra range over fewer gears, we quickly grew to enjoy its abilities on unpowered MTBs. All cogs are stamped from steel & subsequently, the larger ones are pinned to alloy spiders. Due to its provenance, this is, without doubt, the most durable cassette in the range.

Features:

Material: Hardened Alloy Steel, Aluminium Cogs Pinned to Lightweight Spiders Ultra-Wide Ratio with Consistent Progression Prime 9 Technology Our Most Durable Cassette Compatible with HG Freehub Bodies Not Intended for E-Bike Use Weight: 645g Box Two Prime 9 126 Link Chain Nickel The Box Two chain's nickel plating adds both corrosion & wear-resistance. All Prime 9 chains have chamfered shifting edges, solid plates & solid pins to safeguard durability. Our unique inner link spacing is engineered to grab those modern wide/narrow chainrings. We chose to modernize the 9-speed platform due to the chain's spirited reputation.

Features:

Material: Hardened Alloy Steel with Nickel finish Our Most Durable Chain Nickel Plated Protection Durable Hardened Solid Pins Wide/ Narrow Chainring Compatible Prime 9 Technology Weight: 350g FAQ SHIFTER Does the Box Two Prime 9 Shifter come with a cable? Yes. All Box Two Twin Lever Shifters come with a stainless steel shift cable. How do I remove the cap from the cable port to install a new cable? To remove it, use a Phillips head screwdriver & turn it counter-clockwise a quarter turn You can then push the cap out by applying pressure to the cable from the other side. Please Note: The Cable Port is not a screw that un-threads from the cable port, if you turn the cable port screw more than 90 degrees damage may occur. Is the Box Two Prime 9 Shifter compatible with other 9 speed derailleurs? No, traditional 9 speed systems use a Cable Pull that is not compatible with prime 9. DERAILLEUR Are Box Prime 9 derailleurs compatible with Shimano "direct mount" hangers? No, Shimano direct mount hangers are proprietary & are not compatible with Box derailleurs. Is the Box Two Prime 9 Derailleur compatible with other 9 speed components? No, traditional 9 speed systems use a Cable Pull that is not compatible with Prime 9. Are Box Prime 9 derailleurs compatible with drop bar (road) shifters? No, Box Prime 9 derailleurs are not currently compatible with drop bar shifters, but we do offer a clamp for our shifters to mount on some 31.8mm drop handle bars. How should I clean my Box Two Prime 9 derailleur? We suggest removing the derailleur from the bike & using a soft bristle brush or rag with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. CASSETTE Will the Box Two Prime 9 Cassette fit on an wheel with a Sram XD Driver? No this will only work with a HG splined Shimano 9-10-11 speed freehub body. Is the Box Two Prime 9 Cassette compatible with other 9 speed drivetrains? No, The Box Two Prime 9 Cassette is optimized for Box Prime 9 drivetrains & running other component variations can result in poor performance. How should I clean my Box Two Prime 9 Cassette? We suggest removing the cassette from the wheel & using a soft bristle brush with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. CHAIN Is the Box Two Prime 9 Chain compatible with other 9 speed drivetrains? Yes, All Box prime 9 chains have standard external geometry that will work with most existing 9 speed drivetrains. Is the Box Two Prime 9 Chain Compatible with any wide narrow chainring? No, Box Prime 9 chains are compatible with most 11-speed wide narrow chainrings but there are some chainrings that can result in poor performance. We recommend the following 11 speed wide/narrow chainrings for best performance, Wolftooth Components, Raceface, One Up Components, Absolute Black. How should I clean my Box Two Prime 9 Chain? We suggest removing the chain from the bike & using a soft bristle brush or rag with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating.















...

This groupset is available as a Single Shift option for electric mountain bikes (E-MTB) & a Multi Shift option for mountain bikes. Combining four trail-ready components from Box's Two & Three range, this model is simple to set up & means that you can upgrade your existing drivetrain for functional & intuitive shifting performance wherever your next adventure takes you. Did you know that you can mix & match Prime 9? Can't decide between the modern basics of Box Three & the long service life of Box Two? Well, you don't need to! With this pre-configured & pre-tested option, you'll receive a Box Three cassette paired to the durable Box Two derailleur, shifter & chain. Box Three Prime 9 Cassette 11-50T The Box Three cassette draws from both of its Box One & Box Two siblings to create a sensible all-rounder. All cogs are stamped from steel. The main difference here versus Box Two is the use of additional weight-reducing holes on the cogs. This X-Wide version offers an 11-50T range.

Features:
-

Material: Aluminium, Cold Rolled Steel
- Finish: ED Black
- Gear Ratio: 11-50T
- Gears: 11
- 13
- 15
- 18
- 22
- 28
- 34
- 42
- 50
- Box Component's Best All-Rounder Cassette
- Steel Stamped Cogs
- Ultra-Wide Ratio with Consistent Progression
- Prime 9 Technology
- Compatible with HG Freehub Bodies
- Weight: 660g Box Two Prime 9 Chain 126L The Box Two chain's nickel plating adds both corrosion & wear-resistance. All Prime 9 chains have chamfered shifting edges, solid plates & solid pins to safeguard durability. The unique inner link spacing is engineered to grab those modern wide/narrow chainrings. Box chose to modernise the 9-speed platform due to the chain's spirited reputation.

Features:
-

Material: Hardened Alloy Steel
- Finish: Nickel
- Box Component's Most Durable Chain
- Nickel Plated Protection
- Durable Hardened Solid Pins
- Wide/ Narrow Chainring Compatible
- Compatible with most 10, 11, & 12-speed wide / narrow chain rings
- Prime 9 Technology
- Weight: 305g Box Two Prime 9 Shifter (Select Option) The Box Two shifter is the only shifter on the market (other than the Box One) that comes factory stock with a hinged clamp. Box Two is performance tier, so this shifter still maintains the durable cast aluminium top shell but trades out the Box One's 1-piece pull-lever for a 2-piece resin & steel variant. All Prime 9 shifters take advantage of the 9-speed's inherent durability, simplicity, & reliability. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. & the best part is? Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up. Available as a multi-shift option (pull several gears at once) or single-shift shifter option (a sound choice for e-bikes). Please select the option from the menu to suit your bike.

Features:
-

Material: Glass Fibre / Nylon Composite, Steel, Aluminium Alloy
- Finish: Matte Onyx
- Hinged & Extruded Clamp
- 2 pc Pull Lever / Up to 3 Gears Per Shift* (Multi Shift Option)
- Die Cast Top Shell
- Fast Action Release Lever
- Prime 9 Technology
- Multi Shift Option Not Intended for E-Bike Use
- Single Shift Option Recommended for E-Bike Use
- Weight: 135g Box Two Prime 9 X-Wide Rear Derailleur The Box Two Prime 9 Rear Derailleur is very similar to the Box One version however, to be more wallet-friendly, it offers a nonadjustable Tri-Pack Clutch, bushing pulleys & some muted finishes. Box Two rear derailleurs are still optimised for 11-50t cassettes & offer durability & performance for the most demanding terrain, just at lower price.

Features:
-

Material: Stainless Steel, Hardened Alloy Steel
- Finish: Matte Onyx
- Tri-Pack Limited Slip Clutch
- Sealed Bushings Pulleys
- Nylon Composite Knuckle
- Pivot-Tech Cable Stay
- Durable 3D Forged Linkages
- Forged Inner & Outer Cage
- Prime 9 Technology
- Compatible with Standard Derailleur Hangers (Non Direct-Mount)
- Weight: 290g Manufacturer's Part Numbers: BX2PR9GRP03 Black Single Shift BX2PR9GRP04 Black Multi Shift































































...

The Box Four groupset is designed for riders who want less fuss. It features an 8 speed shifter & an 11-42T cassette, which offers a great range of gearing to meet the demands of your off-road adventures. Designed for smooth performance, its rear mech uses a Limited Slip clutch in a compact cage. A final highlight is its custom 8 speed chain that's built for abuse. This makes it a great groupset for riders that want strong groupset without all the frills & at a wallet-friendly price. Box Four 8 Speed Shifter The Box Four shifter's main features aren't strikingly different from Box Three's. The key difference is its 8-speed platform. We've chosen to modernize the 8-speed in much the same way we did the 9-speed for Prime 9. Just like the Prime 9, the Box Four shifters take advantage of the "less is more" theme & exploit durability, simplicity, & reliability.

Features:

Material: glass reinforced fiber / Nylon Composite, Steel Extruded Clamp 2 Piece Pull Lever / Up to 3 Gears Per Shift Resin Top Shell Fast Action Release Lever Not Intended for E-Bike Use Weight: 128g Box Four 8 Speed Wide Rear Derailleur Black The Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8-speed derailleur that is simple & light; this makes it a perfect candidate for every entry-level bike that traditionally has a 3 by drive-train that is neither durable nor user friendly.

Features:

Material: Aluminum, glass reinforced fiber / Nylon Composite, Steel Limited Slip Clutch Bearing Pulleys Nylon Composite Knuckle Direct Channel Cable Stay Die-Cast Linkages Stamped Inner & Outer Cage Compatible with Standard Derailleur Hangers (Non Direct-Mount) Weight: 328g Box Four 8 Speed 11-42T Cassette The Box Four cassette adapts our Prime 9 philosophy of durability, simplicity, & reliability at a great price point. All cogs are stamped from steel, given our durable black coating & then the larger cogs are pinned to each other with spacers for easy installation.

Features: Material Cold Rolled Steel Steel Stamped Cogs No Spiders Wide Ratio & Consistent Progression ED Black Protection Compatible with HG Freehub Bodies Not Intended for E-Bike Use Weight: 473g Box Four 8 Speed 116 Link Chain Natural The Box Four chain employs an 8-speed platform in a similar strategy to the Prime 9 but at a great price point. The chain is polished & then chemically treated to achieve corrosion resistance. We engineered the inner link spacing to be a little tighter than other 8-speed chains & is optimized for use with our Box Four Wide/ Narrow Chainring.

Features:

Material: Hardened Alloy Steel Durable Hardened Solid Pins Wide/ Narrow 8 speed Specific Weight: 364 FAQ Derailleur Are Box Prime 9 derailleurs compatible with Shimano "direct mount" hangers? No, Shimano direct mount hangers are proprietary & are not compatible with Box derailleurs. Is the Box Four Prime 9 Derailleur compatible with other 8 speed components? No, traditional 8 speed systems use a Cable Pull that is not compatible with Prime 9. Are Box Prime 9 derailleurs compatible with drop bar (road) shifters? No, Box Prime 9 derailleurs are not currently compatible with drop bar shifters, but we do offer a clamp for our shifters to mount on some 31.8mm drop handle bars. How should I clean my Box Four Prime 9 derailleur? We suggest removing the derailleur from the bike & using a soft bristle brush or rag with soapy water or a mild degreaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating. Shifter Does the Box Four Shifter come with a cable? Yes. All Box One Twin Lever Shifters come with a stainless steel shift cable. How do I remove the cap from the cable port to install a new cable? To remove it, use a Phillips head screwdriver & turn it counter-clockwise a quarter turn You can then push the cap out by applying pressure to the cable from the other side. Please Note: The Cable Port is not a screw that un-threads from the cable port if you turn the cable port screw more than 90 degrees damage may occur. Is the Box Four Shifter compatible with other 8 speed derailleurs? No, traditional 8 speed systems use a Cable Pull that is not compatible with Box Four components. Cassette Will the Box Four Prime 9 Cassette fit on a wheel with a Sram XD Driver? No this will only work with a HG splined Shimano 9-10-11 speed freehub body. Is the Box Four Prime 9 Cassette compatible with other 8 speed drivetrains? No, The Box Four Prime 9 Cassette is optimized for use only with Box Four Prime 9 Components; running other component variations could result in poor performance. How should I clean my Four Prime 9 Cassette? We suggest removing the cassette from the wheel & using a soft bristle brush with soapy water or a mild degreaser. We do not recommend pressure washing, strong solvents or degreasers as they could degrade the surface coating.













...

This Box Four chain employs an 8 speed platform in a similar strategy to the Prime 9 model but at a great value price point. ...

Heat-treated for added strength & durability, this 11-Speed & Box 7 DH compatible chain gives smooth shifting & movement from its durable, alloy steel construction. Each of the 116 links is finished with a Titanium Aluminum-Nitride coating for further dependability & efficiency on long days going up & down the mountain. ...

Built from a special heat-treated alloy steel, each of the 116 links in this chain is capable of smooth movement & shifting & firm hold to cassette cogs. Finished with a Nickel plating, it works superbly with Box 11-Speed & Box 7-Speed DH cassettes. ...

Easier to adjust, greater efficiency & smoother driving are all key factors provided by this superb model which makes life ...

This stunning groupset focuses on the ride & not just the clicks. It's easy to use thanks to its twin lever shifter actuation ...