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The engineers over at the hive thought outside the ring to bring you the ultimate enduro crank for 2x setups. The TRS R Double Crankset is loaded with novel and innovative features that allow for lighter, stiffer, stronger and all around more reliable cranks. The 30mm spindles offer a firm foundation for the arrangement, while the exclusive Hive Polygon interface produces a more vigorous, reliable, impact-resistant spindle-arm junction capable of handling the bumpy riding of enduro. Spiderless chainrings shave grams and efficiently transfer power for crushing the competition.
All e*13 cranks use a 104mm BCD and are compatible with 8, 9, and 10 speed chainrings. E*13 cranks use a 30mm spindle, however they have not adopted the complete BB30 standard. BB30 refers to an entire standard, based around more than just spindle diameter. E*13 cranks will not just drop into a BB30 frame, but they do make adapter cups to fit BB30 frames. They use their own bottom brackets which are specific for their cranks.
Bottom brackets are sold separately in order to fit a variety of frames. Not sure what BB you need? Check e*thirteen's tech info for BB standard information here (PDF).