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Posted 20 hours ago

Limited Exclusive Edition Box One Presented by Neil Patrick Harris Game

£9.9£99Clearance
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The factory setting for the derailleur’s clutch is stiff, which means its initial movement has a significant resistance peak before the cage is able to smoothly pivot forwards. The clutch interferes with the derailleur’s ability to easily move into lower gears because of the mechanical coupling between the shifter and derailleur via the gear cable, leading to heavy shifter paddle operation.

Because the derailleur’s cable stop is positioned vertically (similar to Shimano) a large loop of cable is required to avoid a sharp bend that could reduce shifting performance.The lever has a lot of travel before a shift is engaged, too, so a fair amount of sustained force was required to change each gear, which didn’t feel particularly natural.

Performance-wise, GX Eagle is significantly better with crisper shifts, a lighter shifter actuation and a wider-ranging – and lighter – cassette. Reducing tension on the adjustable clutch did lighten upshifting but increased the amount of chain slap and reduced overall chain stability, making the adjustment to a lighter setting a compromise not worth making. The cassette uses Shimano’s Hyper Glide (HG) freehub body which is different to SRAM’s XD Driver and Shimano’s Micro Spline system. However, it states its system isn’t compatible with 12-speed chainrings or non-narrow-wide offerings. The cable port is vertically positioned. Alex Evans Box Components Box One Prime 9 drivetrain detailsThe finish on the chain and cassette have shown little signs of wear during the test period and the teeth haven’t become hooked or the chain links stretched. Box Components provides installation and set up guide videos on its YouTube channel to help with the finer details of getting the drivetrain installed and running smoothly. I followed the instructions to the letter to give the drivetrain the best chance possible of performing as intended. Weight-wise, the full 1,375g Box One Prime 9 setup I’ve reviewed is roughly equivalent to SRAM NX Eagle’s 1,362g weight and Shimano Deore M6100’s 1,330g. The clutch wasn’t able to stop the chain from skipping down the cassette when freewheeling. Alex Evans From a pricing perspective, Box Components Box One Prime 9 drivetrain is comparable to SRAM’s GX Eagle level (once you’ve removed the cranks and chainring from the GX groupset).

To access the fourth shift I needed to move my thumb more than was possible without rotating my wrist around the bar. It also required a lot of sustained strength. The cable-pull lever can shift four gears at once if pushed far enough, but accessing the last shift is virtually impossible while riding because of the amount of travel required to engage the gear.

The maximum jump between gears is eight teeth (consistently between the lowest three gears), with the jumps decreasing as the gears become higher. The consistency of the gaps makes adjusting cadence to a gear change more gradual. Box Components Box One Prime 9 drivetrain compared to SRAM NX Eagle, SRAM GX Eagle and Shimano SLX, XT and XTR The cable release lever was also quite stiff but felt way more positive. It was only possible to shift one gear at a time, though. Compatible with HG Freehub Bodies. Compatible with Standard Derailleur Hangers (Non Direct-Mount). Compatible with most 10,11, & 12-speed wide / narrow chain rings. Prime 9 chain must be used.

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