Box Four 8 Speed Shifter Wide sealed bearings

sealed bearings

The Box One Prime 9 chain is protected by a dual coating process: nickel plating for corrosion resistance

Less rotating weight means faster acceleration

Maximum recommended user weight is 99 pounds

2 Ø handlebars

Box Four 8 Speed Shifter Wide sealed bearingsThe Box Four shifter's main features aren't strikingly different from Box Three's. The key difference is its 8 speed platform. We've chosen to modernize the 8 speed in much the same way we did the 9 speed for Prime 9. Just like the Prime 9, the Box Four shifters take advantage of the "less is more" theme and exploit durability, simplicity, and reliability. Available as a multi shift (pull several gears at once) or single shift shifter (a sound choice