Limited Exclusive Edition Box One Presented by Neil Patrick Harris Game

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The clutch wasn’t able to stop the chain from skipping down the cassette when freewheeling. Alex Evans 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.

Shifts are stiff and vague-feeling, while the cable-pull lever has too much travel. The balance between chain control and shift performance isn’t quite right either. The chain, made from hardened alloy steel, has chamfered shifting edges to increase shifting performance, and solid plates and pins to make it stronger. 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. My test sample wasn’t supplied with an I-Spec or Matchmaker adaptor, although these are available. Alex Evans 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.Compared to SLX M7100 (1,221g), XT M8100 (1,153g), XTR M9100 (996g), and GX Eagle (1,163g) it is significantly heavier. 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). The 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. The cable port is vertically positioned. Alex Evans Box Components Box One Prime 9 drivetrain details

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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 I didn’t find myself stretching lower gears out with increased cadences on flatter sections or grinding up steeper hills in higher gears for longer because the gear ratios were too far apart. 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. However, it states its system isn’t compatible with 12-speed chainrings or non-narrow-wide offerings. 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.Installation was relatively straightforward and I was particularly thankful for the shifter’s hinged bar clamp, which meant I didn’t need to remove the grips or brake lever from the bar to install it.