Prime 9™ Technology is a counter-intuitive philosophy based on the less is more theory. It embraces range without adding complexity. The outcome is fewer parts, reduced weight, and increased durability.
IS PRIME 9 SIMPLER?
Same Range With Fewer Gears
• 11-50T cassette with only 9 gears.
Ease of Set-up
• A 9-speed drivetrain has a larger adjustment window than a 12 speed. This makes Prime 9 easier to set-up, more likely to stay in adjustment and less finicky over time.
Wide Compatibility
• No proprietary freehub body, no proprietary chainring, and fewer issues with chainline make Prime 9 a perfect fit on any bike!
• Works with any 10,11, or 12-speed Shimano®, SRAM® or 3rd party wide / narrow chain ring (you must use a Prime 9 chain).
Less Maintenance
More durable and easier to set up when compared to 12-speed drivetrains. Prime 9 provides more time in between recommended service intervals so you can spend more time riding!
Don’t Worry, All Bike Shops Are Familiar With 9 Speed Platforms!
• 3 x 9 drivetrains have been around for 2 decades making a Prime 9 familiar to any bike shop or mechanic for easy conversions, setups, and adjustments!
DOES PRIME 9 PERFORM BETTER?
Shifting Less Means Faster Riding
• Less shifts to get to the best available gear when compared to 12 speed. More time pedaling means faster runs and more King of the Mountain titles (KOMS)!
Optimized Shift Ramps
• Wide range cassettes with fewer gears mean larger gear jumps. Our shift ramps are optimized specifically for these gear combinations creating consistent, solid shifts every time.
Limited Slip Clutch™ Means Better Chain Retention
Instant engaging, constant torque, fully serviceable* and a fully adjustable* clutch means less chain slap, better chain engagement, and no dropped chains. (*available only on box one / two tiers)
Consistent Gear Jumps
• Prime 9 cassettes feature consistent gear spacing which provides even cadence across the cassette’s range.
Lightweight Cassette
• Fewer cogs compared to 12-speed make for a lighter cassette* and better performance in all scenarios. (*Box One Prime 9 compared to other 12 Speed cassettes).
IS PRIME 9 MORE DURABLE?
Straighter Chain-line
Prime 9 drivetrains significantly reduce the chain angle in the lowest gears when compared to 12 speed. This allows the chain to run straighter across all gears, increasing the life of the chain and cassette.
Unique 9 Speed Chain
Prime 9 chains have internal dimensions that are compatible with modern Wide / Narrow chainrings and similar chain retention to 11 / 12-speed chains. Externally, Prime 9 chains have dimensions similar to existing 9-speed chains. This unique geometry allows for thicker side plates than 12-speed drivetrains which resists stretching over time, increasing shifting performance while decreasing wear on the cassette and chainring.
Single Shift Option (E-MTB)
• E-MTB drivetrains can fail when shifts across multiple gears occur under load. These failures are eliminated by restricting the shifting action to one shift at a time. This also increases the life of the drivetrain overall.
Fewer Gears (fewer shifts)
• Fewer gears mean fewer shifts to get to the gears you’d like to be in. This decreases the number of shifts per ride and increases the life of the shifter and cassette.
Full Steel Cassette (all tiers)
• Prime 9 Cassettes offer full steel construction at all levels. This significantly increases the durability of the cassette. No more issues with your climbing gears wearing before the others!
TECHNOLOGY
FEATURES
• Fewer gears mean larger teeth to index
Larger indexing teeth equal less wear and tear
• Less shifting extends shifter life
AVAILABLE TIERS
FEATURES
• Fewer gears mean wider spacing and easier set up
• Combine with better chainline equal less wear and tear
9 cogs weight less than 12
AVAILABLE TIERS
FEATURES
Fewer gears mean less derailleur travel and better chainline.
Less travel and better chainline equal less wear and tear
Less shifting extends derailleur life.
AVAILABLE TIERS
FEATURES
Unique geometry allows for thicker side plates than 12-speed drivetrains.
• Internal dimensions that are compatible with modern wide/Narrow chainrings.
• Resists stretching over time increasing shifting Performance.
AVAILABLE TIERS
BOX ONE PRIME 9 GEN 2 SHIFTER
* Available in Multi / Single Shifting Set-up
SKU: BX-SH1-P9G2MS-BK, BX-SH1-P9G2SS-BK
FEATURES
• Prime 9 TM Technology
• Our Best Performing Gen 2 Shifter
Machined and hinged clamp > light & easy to install > reposition-able
• Metal injection gears (inside) > tougher & harder = increased service life & crisper feedback
Magnesium pull-lever > added structure without weight > crisper feedback
• Magnesium top-shell > added structure without weight> crisper feedback
Tactile pull-lever pad > increased friction = no missed gears
No-loss gear changes > immediate engagement = shorter and faster gear pulls
SPECIFICATIONS
• Process/Material
• Top Shell: Die Cast / Magnesium
Bottom Shell: Injection Molded / Glass Fiber-Nylon Composite
Pull Lever: Die Cast / Magnesium
• Pull Lever Pad: Injection Molded / Polyurethane
• Finish: Gloss-Matte Onyx Finish
Speeds: 9
Cable: Box One Slick Coated Stainless Steel Cable
• Limited Lifetime Warranty
• Compatibility Platform
• Single Shift: Ebike
• Multi Shift: Non-Ebike (Up to 2 gears per shift)
• Cross Compatibility Derailleur
• Box One Gen 2 Prime 9
• Box Two Gen 2 Prime 9
• Weight: 111g/3.9oz
BOX ONE PRIME 9 GEN 2 DERAILLEUR
SKU: BX-DR1-P9G2XWC-BK
FEATURES
• Prime 9 TM Technology
Our Best Performing Gen 2 Derailleur For Aggressive Terrain
• Tri-Pack 2.0 Clutch larger discs & finer threads > increased
torque & adjustability = less chain slap & easier to set up
Wide offset cage > more pulley offset & cage surface = crisper shifting & tougher
• Titanium hardware > strength, corrosion resistance & less weight = longer service life
New geometry > near horizontal actuation = light gear pulls & less ghost shifting
• Floating lower pulley > points toward chainring = longer service life
SPECIFICATIONS
• Process/Material
Hardware: CNC / Titanium
B-Knuckle: High Pressure Die-Cast / Aluminum
• P-Knuckle: Injection Molded / Glass Fiber / Nylon Composite
• Linkages: High Pressure Die-Cast / Aluminum
Cage: Forged / 7075-T6 Aluminum
Finish: Gloss-Matte Onyx Finish
• Speeds: 9
• Limited Lifetime Warranty Compatibility
• Platform
• Ebike
• Non-Ebike
Cross Compatibility
• Shifter
• Box One Gen 2 Prime 9
• Box Two Gen 2 Prime 9
Derailleur Hanger: Non-Direct Mount
• Weight: 315g/11.1oz
02. REAR DERAILLEUR
CASSETTE
BOX ONE PRIME 9 GEN 2 X-WIDE 11-50T CASSETTE
SKU: BX-CS1-P9G21150-AM, BX-CS1-P9G21250-AM
FEATURES
• Prime 9 TM Technology
Our Best Performing Gen 2 Cassette
• New shift ramps > adjusted shape & position = crisper & faster shifting
• New tooth shape > exact fit radii for Prime 9 chain rollers = much higher load capacity & longer service life
• New hardening process > 2x harder than Gen 1 = Much higher load capacity & longer service life
SPECIFICATIONS
• Process/Material Cogs: CNC Unibody / Ultra-Hardened Chromoly Steel
Spider: CNC Support Disc / 7075-T6 Aluminum
• Lockring: CNC / 6061-T6 Aluminum
• Finish: DLC Black over Nickel Speeds: 9
• Non-Ebike Gear: 11 - 13 - 15 - 18 - 22 - 28 - 34 - 42 - 50
• Compatibility
• Platform Non-Ebike
• Driver: HG Freehub Body
• Cross Compatibility
• Chain Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
Weight: 365g/12.8oz
BOX ONE PRIME 9 CHAIN
SKU: BX-CN1-P9A126-BK
FEATURES
• Prime 9 TM Technology
• Our Best Performing Chain
Durable dual coating > increased hardness = higher load capacity and longer service life
• 11/12-Speed internals > inside dimensions = chainring compatibility like 11 & 12-speed chains
9-Speed externals > thicker plates = much higher load capacity & longer service life
SPECIFICATIONS
• Process/Material
• Stamped / Hardened Alloy Steel
Pin Type: Solid
Finish: DLC Black Over Nickel
• Speeds: 9
• Salt Spray Life: 45 hours
Compatibility Chainring: MTB 11/12 Speed Wide Narrow
• All Prime 9 Cassettes
• Weight: 315g/11.1oz
CHAIN
SHIFTER
BOX TWO PRIME 9 GEN 2 SHIFTER
* Available in Multi / Single Shifting Set-up
SKU: BX-SH2-P9G2MS-BK, BX-SH2-P9G2SS-BK
FEATURES
• Prime 9 TM Technology
• Our Best Durable Gen 2 Shifter
Hinged clamp > easy install = repositionable
Metal injection gears > tougher & harder = increased service life & crisper feedback
• Magnesium top-shell > added structure without weight = crisper feedback
Magnesium pull-lever > added structure without weight = crisper feedback
• No-loss gear changes > immediate engagement = shorter & faster gear pulls
SPECIFICATIONS
• Process/Material
• Top Shell: Die Cast / Magnesium
• Bottom Shell: Injection Molded / Glass Fiber-Nylon Composite
• Pull Lever: Die Cast / Magnesium
• Finish: Matte Hard Onyx
Speeds: 9
Cable: Box Two Low Friction Stainless Steel
• Compatibility
• Platform
Single Shift: Ebike
Multi Shift: Non-Ebike (Up to 2 gears per shift)
• Cross Compatibility
• Derailleur
Box One Gen 2 Prime 9
Box Two Gen 2 Prime 9
• Weight: 135g/4.6oz
02. REAR DERAILLEUR
BOX TWO PRIME 9 GEN 2 DERAILLEUR
SKU: BX-DR2-P9G2XWC-BK
FEATURES
• Prime 9 TM Technology
• Our Best Durable Gen 2 Derailleur For Aggressive Terrain
• Tri-Pack 2.0 clutch larger discs & finer threads > increased torque & adjustability = less chain slap & easier to set up
Wide offset cage > more pulley offset & cage surface = crisper shifting & tougher
• New geometry > near horizontal actuation = light gear pulls & less ghost shifting
Set-up management > out-of-sight cable, cable pulley & adjustment screws, B-Gap tool = simpler and cleaner set-up
• Floating lower pulley > points toward chainring = longer service life
SPECIFICATIONS
• Process/Material
• Hardware: Turned / Chromoly Steel & 7075-T6 Aluminum
B-Knuckle: High Pressure Die-Cast / Aluminum
• P-Knuckle: Injection Molded / Carbon-Nylon Composite
• Linkages: High Pressure Die-Cast / Aluminum
• Cage: Forged / 7075-T6 Aluminum Finish: Matte Hard Onyx
• Speeds: 9
• Compatibility Platform Ebike
• Non-Ebike
• Cross Compatibility Shifter
Box One Gen 2 Prime 9
• Box Two Gen 2 Prime 9
• Derailleur Hanger: Non-Direct Mount
Weight: 330g/11.6oz
BOX TWO PRIME 9 X-WIDE CASSETTE
SKU: BX-CS2-P9A1150-BK, BX-CS2-P9A1250-BK
FEATURES
• Prime 9 TM Technology
Our Most Durable Cassette
• Steel Stamped Cogs
• Lightweight Alloy Spiders
• Ultra-Wide Ratio with Consistent Progression
Also Available as 12-50T for E-bikes
SPECIFICATIONS
• Process/Material Cogs: Stamped / Hardened Steel Spider: CNC / 6061-T6 Aluminum
• Lockring: CNC / 6061-T6 Aluminum
• Finish: ED Black Speeds: 9
• Non-Ebike Gear: 11 - 13 - 15 -
• Ebike Gear: 12 - 14 - 16 - 18
• Compatibility Platform
• Ebike
• Non-Ebike
• Driver: HG Freehub Body Cross Compatibility
• Chain:
• Box One Prime 9
• Box Two Prime 9
Box Three Prime 9
• Weight: 645g/22.7oz
03. CASSETTE
BOX TWO PRIME 9 CHAIN
SKU: BX-CN2-P9A126-NI
FEATURES
• Prime 9 TM Technology
• Our Most Durable Chain Wide/Narrow Chainring Compatible Durable Hardened Solid Pins
• Includes Nickel Connecting Link
• Nickel Plated Protection
Available in: Extra Long for Long Wheel Base & Cargo Bikes
SPECIFICATIONS
• Process/Material
• Stamped / Hardened Alloy Steel
Pin Type: Solid Finish: Nickel
• Speeds: 9
• Salt Spray Life: 45 hours
Compatibility Platform
• Ebike
• Non-Ebike
Suitable for Most High Pivot Bikes (144L)
Chainring: MTB 11/12 Speed Wide Narrow
• All Prime 9 Cassettes
• Weight:
315g/11.1oz [126L]
385g/13.5oz [144L]
04. CHAIN
BOX THREE PRIME 9 SHIFTER
* Available in Multi / Single Shifting Set-up
FEATURES
• Prime 9 TM Technology
• Our Best All-Rounder Shifter
• Lightweight Extruded Clamp
• Responsive 2 Piece Pull Lever
• MTB Style Release Lever (V2)
SPECIFICATIONS
• Process/Material
• Top Shell: Injection Molded / Glass Fiber-Nylon Composite
• Bottom Shell: Injection Molded / Glass Fiber-Nylon Composite
• Pull Lever: Injection Molded / Glass Fiber-Nylon Composite
• Finish: Matte Black
• Speeds: 9
Cable: Stainless Steel Braided Compatibility
Platform
Single Shift: Ebike
Multi Shift: Non-Ebike (Up to 2 gears per shift)
Cross Compatibility
Derailleur
• Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
• Weight: 128g/4.5oz
BOX THREE PRIME 9 X-WIDE REAR DERAILLEUR
FEATURES
SPECIFICATIONS
• Prime 9 TM Technology
• Our Best All-Rounder Derailleur
• For Light/Medium Terrain
• Limited Slip Clutch™ Bearing Pulleys
• Process/Material
• B-Knuckle: Die Cast / Aluminum
• P-Knuckle: Injection Molded / Glass-Nylon Composite
Linkages: Die Cast / Aluminum
Cage: Stamped / Aluminum
Finish: Matte Onyx Speeds: 9
Compatibility Platform Ebike Non-Ebike
• Cross Compatibility
• Shifter
• Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
• Derailleur Hanger: Non-Direct Mount
• Weight: 360g/12.7oz
02. REAR DERAILLEUR
03. CASSETTE
BOX THREE PRIME 9 CASSETTE
FEATURES
• Prime 9 TM Technology
• Our Best All-Rounder Cassette
• Steel Stamped Cogs
• Steel Stamped Spiders Ultra-Wide Ratio with Consistent Progression Also Available as 12-46/50T for E-bikes
SPECIFICATIONS
• Process/Material
• Cogs: Stamped / Hardened Steel Spider: Stamped / Hardened Steel Lockring: CNC / Hardened Steel
• Finish: ED Black
• Speeds: 9 Gear:
[11-46T] 11 - 13 - 15 - 18 - 22 - 28 - 34 - 40 - 46
• [11-50T] 11 - 13 - 15 - 18 - 22 - 28 - 34 - 42 - 50
• [12-46T] 12 - 14 - 16 - 18 - 22 - 28 - 34 - 40 - 46
[12-50T] 12 - 14 - 16 - 18 - 22 - 28 - 34 - 42 - 50 Compatibility
• Platform
• Ebike Non-Ebike
• Driver: HG Freehub Body
• Cross Compatibility
• Chain Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
• Weight: 565g/19.2oz [11-46T]
• 660g/23.2oz [11-50T]
BOX THREE PRIME 9 CHAIN
FEATURES
• Prime 9 TM Technology
• Our Best All-Rounder Chain Polished & Treated Protection Includes Connecting Link
SPECIFICATIONS
• Process/Material
• Stamped / Hardened Alloy Steel
Pin Type: Solid
Finish: Polished then Chemically Treated
• Speeds: 9
• Salt Spray Life: 15 hours
Compatibility Platform
• Ebike
• Non-Ebike
Chainring: MTB 11/12 Speed Wide Narrow
All Prime 9 Cassettes
• Weight: 305g/10.7oz
04. CHAIN
Compact/Comfort Style
Compact/Comfort Style with Display
BOX FOUR 8 SPEED SHIFTER
* Available with or without display
FEATURES
• Our 8 is Enough Shifter
• Lightweight Extruded Clamp
• Responsive 2 Piece Pull Lever
• MTB Style Release Lever (V2)
Gear Display Option Available
Upright & Compact Shift Levers Available
SPECIFICATIONS
• Process/Material
• Top Shell: Injection Molded / Glass Fiber-Nylon Composite
• Bottom Shell: Injection Molded / Glass Fiber-Nylon Composite
Pull Lever: Injection Molded / Glass Fiber-Nylon Composite
Finish: Matte Black
Speeds: 8
Cable: Stainless Steel Braided
Compatibility Platform
Single Shift: Ebike
Multi Shift: Non-Ebike (Up to 2 gears per shift)
• Cross Compatibility
• Derailleur
• Box Four 8 Speed
• Weight:
• 128g/4.5oz
• 148g/5.2oz (With Display)
MTB Style Release Lever (V2)
01. SHIFTER
BOX FOUR 8 SPEED WIDE REAR DERAILLEUR
FEATURES
• Our 8 is Enough Derailleur w/ Prime 9 TM Technology
• For Light/Medium Terrain
• Limited Slip Clutch™
• Bearing Pulleys
SPECIFICATIONS
• Process/Material
• B-Knuckle: Die Cast / Aluminum
• P-Knuckle: Injection Molded / Glass-Nylon Composite
Linkages: Die Cast / Aluminum
Cage: Stamped / Aluminum
Finish: Matte Onyx
Speeds: 8
Compatibility
Platform Ebike Non-Ebike
• Cross Compatibility
• Shifter
• Box Four 8 Speed
• Derailleur Hanger: Non-Direct Mount
• Weight: 330g/11.6oz
02. REAR DERAILLEUR
FEATURES
• Our 8 is Enough Cassette w/ Prime 9 TM Technology
• Steel Stamped Cogs
• No Spiders
• Wide Ratio & Consistent Progression
• Also Available as 12-42T for E-bikes
SPECIFICATIONS
• Process/Material
• Cogs: Stamped / Hardened Steel
• Spider: Stamped / Hardened Steel
• Lockring: CNC / Hardened Steel
• Finish: ED Black
• Speeds: 8
Gear:
[11-42T] 11 - 13 - 15 - 18 - 22 - 28 - 34 - 42
[12-42T] 12 - 14 - 16 - 18 - 22 - 28 - 34 - 42
Compatibility Platform Ebike Non-Ebike
• Driver: HG Freehub Body
• Chain: Box Four 8 Speed
• Weight:
• 437g/16.6oz [11-42T]
• 485g/17.1oz [12-42T]
03. CASSETTE
BOX FOUR 8 SPEED WIDE CASSETTE
BOX FOUR 8 SPEED CHAIN
FEATURES
• Our 8 is Enough Chain w/ Prime 9 TM Technology
• Durable Hardened Solid Pins Includes Connecting Link
SPECIFICATIONS
• Process/Material
Stamped / Hardened Alloy Steel
Pin Type: Solid
Finish: Natural
Speeds: 8
Salt Spray Life: 15 hours
Compatibility
Platform Ebike
• Non-Ebike
• Chainring: Box Four 8 Speed Wide Narrow
• Cassette: Box Four 8 Speed
• Weight: 364g/12.8oz
WHY?
+ IS PRIME 9 BETTER?
• Durable
• Simple Performance
+ IS PRIME 9 MORE ENJOYABLE THAN 12 SPEED?
• More time on the bike; less time in the shop.
• Less shifts to get to the best available gear.
+ DOES THE PRIME 9 PERFORM BETTER THAN A TRADITIONAL 9 SPEED?
• Prime 9 uses a proven 9 speed drivetrain platform, but integrates modern technology.
• 1x instead of 3x.
• Limited Slip Clutch™. Compatible with modern Wide / Narrow chainrings.
• Added range without adding gears. Consistent gear jumps.
• Optimized shift up and shift down ramps.
HOW?
+ IS PRIME 9 MORE DURABLE?
Straighter Chain-line
Prime 9 drivetrains significantly reduce the chain angle in the lowest gears when compared to 12 speed. This allows the chain to run straighter across all gears, increasing the life of the chain and cassette.
Single Shift Option (E-MTB)
E-MTB drivetrains can fail when shifts across multiple gears occur under load. These failures are eliminated by restricting the shifting action to one shift at a time. This also increases the life of the drivetrain overall.
Unique 9 Speed Chain
Fewer Gears (less shifts)
Fewer gears means less shifts to get to the gears you’d like to be in. This decreases the amount of shifts per ride and increases the life of the shifter and cassette.
Full Steel Cassette (all tiers)
Prime 9 Cassettes offer full steel construction at all levels. This significantly increases the durability of the cassette. No more issues with your climbing gears wearing before the others!
Prime 9 chains have internal dimensions that are compatible with modern Wide / Narrow chainrings and similar chain retention to 11 / 12 speed chains. Externally, Prime 9 chains have dimensions similar to existing 9 speed chains. This unique geometry allows for thicker side plates than 12 speed drivetrains which resists stretching over time, increasing shifting performance while decreasing wear on the cassette and chainring.
HOW? CONTINUED...
+ IS PRIME 9 SIMPLER?
Same
Range With Fewer Gears
11-50T cassette with only 9 gears
Ease of Set-up
A 9 speed drivetrain has a larger adjustment window than a 12 speed. This makes Prime 9 easier to set-up, more likely to stay in adjustment and less finicky over time.
Wide Compatibility
No proprietary freehub body, no proprietary chainring, and fewer issues with chainline make Prime 9 a perfect fit on any bike!
Less
Maintenance
More durable and easier to setup when compared to 12 speed drivetrains. Prime 9 provides more time in between recommended service intervals so you can spend more time riding!
Don’t Worry, All Bike Shops Are Familiar With 9 Speed Platforms!
3 x 9 drivetrains have been around for 2 decades making a Prime 9 familiar to any bike shop or mechanic for easy conversions, setups and adjustments!
+ DOES PRIME 9 PERFORM BETTER?
Shifting Less Means Faster Riding
Less shifts to get to the best available gear when compared to 12 speed. More time pedaling means faster runs and more King of the Mountain titles (KOMS)!
Optimized Shift Ramps
Wide range cassettes with fewer gears means larger gear jumps. Our shift ramps are optimized specifically for these gear combinations creating consistent, solid Shifts every time.
Lightweight Cassette
Limited Slip Clutch™ Means Better Chain Retention
Instant engaging, constant torque, fully serviceable* and a fully adjustable* clutch means less chain slap, better chain engagement and no dropped chains. (*available only on box one / two tiers)
Consistent Gear Jumps
Prime 9 cassettes feature consistent gear spacing which provides even cadence across the cassette’s range.
Fewer cogs compared to 12 speed make for a lighter cassette* and better performance in all scenarios. (*Box One Prime 9 compared to other 12 Speed cassettes)
WHAT’S THE CATCH?
+ ISN’T 9 SPEED OLD?
9 speed has deep roots in cycling and has been around in various configurations dating back to the late 90’s, however, these configurations were almost always “3x” drivetrains consisting of a front derailleur with 3 gears and a non-clutch rear derailleur with a small range, 11-34 cassette. Prime 9 is unique in that it combines much of the durability and reliability of the traditional 3 x 9 s peed drivetrains with the simplicity of modern 1x drivetrains. This creates a bomb-proof drivetrain that is easy to set up and has a simple user experience.
Prime 9 chains have internal dimensions that are compatible with modern Wide / Narrow chainrings and perform similarly to 11 / 1 2 speed chains.. Externally, Prime 9 chains have dimensions similar to existing 9 speed chains. This unique geometry allows for thicker side plates than 12 speed drivetrains which resists stretching over time increasing shifting performance while decreasing wear on the cassette and chainring.
More does not always mean better, and we believe that 9 is Fine!
+ IS SUCH A LARGE RANGE WITH FEW GEARS BAD?
An 11 to 50T range is a large spread to cover over 9 gears, but we have tuned the gear ratios to have consistent cadence throughout the cassette range. This along with our optimized shift ramps makes for a smooth experience for any rider.
+ IS USING A HEAVIER CHAIN BAD?
9 speed chains have been used on drivetrains for decades. To this day they are commonly seen on some of the most torturous bike styles such as touring bikes, meant to last 1000s of miles under extreme conditions. This long-standing reputation for durability easily trumps the potential savings of a few grams, especially on arguably the most important part of the drivetrain.
Note: Other 9 speed chains are compatible with the Prime 9 derailleurs and cassettes but may increase the possibility for dropped chains, we recommend using a Box Prime 9 Chain for optimal performance!
+ WHY 11T HIGH GEAR VS. 10T?
There are a number of benefits of an 11T cassette design when compared to a 10T. Prime 9 utilizes the 11T design for two main reasons; Having more teeth allows for a more evenly distributed load from pedaling torque, increasing both cassette and chain life. Additionally, choosing an 11T design allows Prime 9 Cassettes to be compatible with the most popular freehub body in the industry.
+ PLEASE LET U S KNOW?
If you have any questions that we haven’t addressed please let us know!
COMPATIBILITY / RECOMMENDATIONS
Prime 9 Drivetrains are compatible with most modern bikes without the purchase of proprietary components to complete a conversion. Here is a list of recommendations for the best performance possible.
+ FREEHUB BODIES
All Prime 9 cassettes utilize standard 9 / 10 / 11 speed HG Freehub Bodies.
+ CHAINRINGS
Prime 9 chains have internal dimensions that are compatible with modern Wide / Narrow chainrings.
Wolf Tooth, One Up and Absolute Black (amongst others) make great chainrings that are compatible with Prime 9 drivetrains!
+ CHAINLINE
Almost all bikes have an acceptable chainline for Prime 9 drivetrains; technically speaking, the ideal chainline is 50-53mm. For MOST setups, we recommend using a boost chainring which offers less offset and provides better shift performance.
+ CHAIN
Prime 9 chains have internal dimensions that are compatible with modern Wide / Narrow chainrings and perform similarly to 11 / 12 speed chains. Externally, Prime 9 chains have similar dimensions to existing 9 speed chains. This unique geometry allows for thicker side plates than 12 speed drivetrains which resists stretching over time increasing shifting performance while decreasing wear on the cassette and chainring.
Note: Other 9 speed chains are compatible with the Prime 9 derailleurs and cassettes but may increase the possibility for dropped chains, we recommend using a Box Prime 9 Chain for optimal performance!
+ OTHER RECOMMENDATIONS
If you plan to ride in very rough muddy conditions, we recommend a chain guide or chain keeper. Without these precautions, you may experience chaindrops and / or chainsuck.
If using Box Prime 9 Drivetrain, please use Box Prime 9 chains for best performance and chain retention. Using non-recommended chains may lead to chain dropping and / or noise.
SHIFTER
* Available in Multi / Single Shifting Set-up
Prime 9TM Technology
No-loss Gear Changes
Magnesium Pull-Lever
Magnesium Top-Shell
Metal Injection Gears
1 pc pull lever / Up to 3 per shift (Multi*)
Slick Coated Stainless Steel Braided Cable
Low Friction Stainless Steel Braided Cable
Lightweight Machined and Hinged Clamp
Extruded and Hinged Clamp
Tactile Pull-Lever Pad
Also available in Single Shift Variant (E-Bike Specific)
Also available with Compact (Comfort) Levers
(with display)
REAR DERAILLEUR
Prime 9TM Technology
New Near Horizontal Actuation and Geometry
Tri-Pack™ 2.0 Limited Slip Clutch
Limited Slip ClutchTM
Forged 7075-T6 Aluminum Inner and Outer Cage
Wide Offset Cage
Floating Lower Pulley
Hidden Cable & Cable Pulley
Precision Sealed Bearing Pulleys
B-Gap Tool
Titanium Hardware
RACE SPECIFIC
PERFORMANCE
PERFORMANCE
CASSETTE
Prime 9TM Technology
Ultra-Wide Ratio With Consistent Progression
Optimized Tooth Shape And Profile
Durable Lightweight Unibody Construction
Standard HG Freehub Body*
Lightweight Internal Aluminum Support Disc
Lightweight Aluminum Spiders
Durable DLC over Nickel Dual-Coating
Chromoly Steel Construction
Also available in E-Bike variant
Weight
365g /12.8oz
645g/22.7oz
565g/19.2oz (11-46T)
660g/23.2oz (11-50T)
575g/20.3oz (12-46T)
670g/23.6oz (12-50T)
CHAIN
Prime 9TM Technology
Durable Hardened Solid Pin
Durable DLC over Nickel Dual-Coating
Nickel Finish
Hardened Alloy Steel
473g/16.6oz
