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Box®
Box Two Prime 9 X-Wide 11-50T/12-50T Cassette
Best for
race-focused BMX riders
Race class
Confirm by rider size
Fit checked before shipping · Mechanic support via WhatsApp · Authorized dealer sourcing
100% Secure Transaction
Live Stock
Inventory updated daily. Items in stock ship the next business day.
Fast Delivery
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Secure Payments
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Satisfaction Guarantee
Every item is checked before shipment. Return within 10 business days if unsatisfied.
Preorder terms
Clear timing before you commit.
09 Sep 2026 target
Full payment or WhatsApp-assisted
Cancelable before supplier confirmation
~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
alloy
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.
Similar size alternatives
Compare before buying
Product info
About This Product
The Box Two Prime 9 X-Wide cassette is where Prime 9 began. Originally developed for E-MTBs to deliver long service life and a wide gear range with fewer gears, it quickly proved itself on unpowered MTBs as well. All cogs are stamped from steel, with the larger ones pinned to alloy spiders for added strength and durability. Due to its origins, it remains the most durable cassette in the range. Available in two versions, the standard 11-50T is suited for traditional MTB use, while the 12-50T E-Bike version features slightly adjusted gear spacing optimized to handle the unique torque and load demands of E-MTB riding, offering smoother power transfer and increased longevity. SUPPORT MATERIAL Prime 9 Technology™ View Prime 9 Drivetrain Compatibility Manual View Prime 9 Comparison Chart Why Prime 9? Please see page 6 of our guide for notes regarding the 2 HG drivers.
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THIS ITEM
Box Two Prime 9 X-Wide 11-50T/12-50T Cassette
COMBINED TOTAL
Rp 3.794.939
Preorder each separately via WhatsApp for bundle deals
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Box Two Prime 9 X-Wide 11-50T/12-50T Cassette
Rp 1.234.974