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Your cart is empty.Product Description
IS PRIME 9 SIMPLER?
- Same Range with Fewer Gears
- Ease of Set-Up
- Wide Compatibility
- Less Maintenance
- Don't Worry, All Bike Shops Are Familiar With 9 Speed Platforms!
IS PRIME 9 MORE DURABLE?
- Straighter Chain-line
- Unique 9 Speed Chain
- Single Shift Option (E-MTB)
- Fewer Gears (fewer shifts)
- Full Steel Cassette (all tiers)
DOES PRIME 9 PERFORM BETTER?
- Shifting Less Means Faster Riding
- Optimized Shift Ramps
- Consistent Gear Jumps
- Lightweight Cassette
This groupset includes
Box One Prime 9 Multi Shifter
- Our Best Performing Shifter
- Lightweight Hinged & Machined Clamp
- Responsive 1-Piece Pull Lever
- MTB Style Release Lever (V2)
Box One Prime 9 Derailleur
- Our Best Performing Derailleur
- For Aggressive Terrain
- Adjustable Tri-Pack Limited Slip Clutch
- Precision Sealed Bearing Pulleys
Box Two Prime 9 Cassette
- Our Most Durable Cassette
- Steel Stamped Cogs
- Lightweight Alloy Spiders
- Ultra-Wide Ratio with Consistent Progression
Box One Prime 9 Chain
- Our Best Performing Chain
- Durable Dual-Coating
- Includes Black Connecting Link
REYMOND J.
Reviewed in France on February 20, 2025
excellent kit complet de bonne qualité et a un prix imbattable.
Markus
Reviewed in Canada on February 11, 2025
As good as Shimano, way better than SRAM, all for a fraction of the price; awesome
Ralf Zimmermann
Reviewed in Germany on January 9, 2025
Der erste Eindruck ist okay. Die Schaltung schaltet aber nicht sehr präzise. Sehr rauer Lauf, schaltet sehr schwer und der Schalthebel ist kurz vorm abbrechen. Zum richtig biken eher nicht zu empfehlen. Schade....
Tad
Reviewed in the United States on August 2, 2024
I put this on a nearly 20 year old Cannondale Jekyll about a month ago and I've been really happy with it. I had a 3x9 Sram X9 on it before and I don't think I'll ever go back.Paired it with a cheap Amazon narrow-wide front chain ring, and it's been awesome. I rarely have to use any but the middle ~5-6 gears, and the clutch is great. I haven't thrown a chain yet. The shifting is clean and smooth - no problem even when shifting under heavy load.Installation was fairly simple. If you've installed a derailleur before it'll be pretty familiar. If not, recommend grabbing a book like Zinn and the Art of Mountain Bike Maintenance. The Box videos are very helpful too. The derailleur did take a bit of adjusting, but that will be the case for any new installation - don't be surprised if it gets a little frustrating!I am very happy I went with Box, and I will happily use their products in the future.
Adam Mushumanski
Reviewed in Canada on May 20, 2024
I had high hopes for the box prime 9 stuff, from the moment they launched it. Finally pull the trigger on it to ditch my unreliable sram 12 speed system, and have had nothing but issues with the box system. The Box 1 derailleur clutch is fantastic, the Box 2 cassette is very high quality, and the chain feels extremely sturdy compared to a sram eagle chain.The problems lie with the shifter. After installing everything on the bike THE VERY FIRST TIME shifting through all the gears, the shifter malfunctioned and left it stuck in the lowest (easiest) gear. I took the shifter mechanism out of the shifter housing to find this (see photos). Not sure how to go about avoiding this, as it does this almost every time shifting down to the low gears. Even when shifting extremely gentility, the cable still comes off track and gets hopelessly stuck within the shifter mechanisms frame(?). I had high hopes for this stuff being lower maintenance, but have found the opposite with the shifter issues :(3 Month update. The shifter has completely grenaded itself. Seriously disappointed with the box prime 9 system. Will be swapping back to sram or shimano
PNC
Reviewed in France on December 16, 2024
Top bonne transmission couple avec un plateau 32 dents naarrow wide sa fait boulot.
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