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<\/a><\/p>\nSRAM EX1 is poised to have the same impact on the E-MTB world. EX1 is the first and only drivetrain available today that was designed from the ground up specifically for E-MTBs.<\/p>\n
Until the development of EX1, the E-MTB was seen simply as a mountain bike plus electric assistance. Though that definition is not strictly incorrect, the whole, in this case, is significantly greater than the sum of its parts. The experience an E-MTB provides its rider and the demands placed on each element of the entire system are incredibly different than with a traditional, non-electric-assisted mountain bike. Therefore, the thinking simply has to be different.<\/p>\n
<\/a>\n<\/div>\nBuilding upon information from motor manufacturers, and its own interpretation of problems associated with using a conventional mountain bike drivetrain on an E-MTB, SRAM\u2019s EX1 development team used advanced data acquisition methods for field testing, combined with traditional lab testing, to create a perfect E-MTB drivetrain solution.<\/p>\n
The heart and soul of the EX1 system is its E-BLOCK cassette, which is designed to provide the optimum E-MTB gear range, as well as increased battery longevity and component wear life. Its 11- to 48-tooth, 8-speed design allows a 436-percent gear range. Based on its testing, SRAM believes this is the ideal E-MTB gear range.<\/p>\n
The 8-speed design incorporates big (30-percent average) steps between gears. The big steps, in combination with the EX1 group\u2019s single-action shift lever, reduces riders\u2019 tendency to double shift. The single-shift design significantly helps chain and cassette wear.<\/p>\n
The cassette, machined from case-hardened tool steel, is narrower than a 10- or 11-speed cassette, which helps maintain a straighter chain line throughout the gear range. Engineers were then able to pair the cassette with a slightly wider, tougher chain to increase durability\u2014which is critical in the E-MTB environment, where shifting is typically done at very high torque and low pedaling cadence, versus the low-torque, high-cadence environment of traditional mountain biking.<\/p>\n
The E-BLOCK cassette uses a non-XD driver body. The larger virtual front sprocket provided by a midship motor all but eliminates the need for a 10-tooth cassette cog, so the E-BLOCK design\u2019s focus is the larger, \u201cclimbing\u201d cogs. By combining the proper climbing gears with motor output, battery power is optimized, and lasts longer given the same conditions.<\/p>\n
Shifting performance and feel is signature SRAM. As stated previously, the trigger shifter has been designed to shift once at a time\u2014not multiples\u2014but the action is positive and exact. The EX1 derailleur employs the rugged, X-HORIZON design seen in XX1 and X01 derailleurs, with a redesigned clutch, cage and pulley design specifically for the 48-tooth cog.<\/p>\n Purpose-built solutions mean greater opportunities.<\/p>\n Ever since the first beat-up old newsboy bikes were modified to ride in the dirt, mountain biking has been about defying convention and finding new ways to make the ride better. And each new style of riding requires a perfect solution. EX1 is the world\u2019s first drivetrain system specifically developed for the unique demands of the E-MTB. With proven SRAM 1x technology as its DNA, this group\u2019s heart is the EX1 cassette, which allows optimal steps between cogs for more purpose-driven shifts and providing the best gear range for midship-motor E-MTBs. Each EX1 component is engineered to perfectly complement the system, and the result is quiet operation, intuitive shifting, increased battery life and greater durability. EX1 opens the door to a brave new world of mountain biking.<\/p>\n Lightweight, durable, stiff and designed specifically to work with Bosch and Brose mid-ship motors, EX1 crankarms are purpose built for the high-torque E-MTB environment.<\/p>\n Features and Benefits<\/strong><\/p>\n Specifications<\/strong><\/p>\n <\/p>\n Built with the needs of E-MTB riders in mind, and incorporating the same X-SYNC chain management technology found in every SRAM 1x drivetrain, EX1 offers 14-, 16- and 18-tooth sprockets for Bosch motors.<\/p>\n Specifications<\/strong><\/p>\n <\/p>\n E-BLOCK shifting technology is a fundamental redevelopment of external drivetrain shifting. On the E-BLOCK cassette, the chain has a defined link position on each cog. Cog architecture has been engineered to work with both inner and outer links of the chain, which allows extremely refined shifting for both inboard and outboard shifts. The result is precise and robust shifting performance in any situation, even with full motor support.<\/p>\n Features and benefits:<\/strong><\/p>\n Specifications:<\/strong><\/p>\n <\/p>\n The EX1 derailleur capitalizes on the robust build and precise shifting attributes of the X-HORIZON design, to create the world\u2019s first derailleur specifically made for E-MTBs. Engineered to handle high-torque, low-cadence shifting across the 11-48 tooth E-BLOCK cassette, the EX1 derailleur gives E-MTB riders clean, confident shifts, so they can spend more time enjoying the ride.<\/p>\n Features and benefits<\/strong><\/p>\n Specifications<\/strong><\/p>\n <\/p>\n It has the proven SRAM shifter technology and authoritative lever feel, but the EX1 shifter has been engineered to deliver one perfectly accurate shift at a time, alleviating double shifting and over shifting. Single precise gear changes increase battery life and help to decrease component wear.<\/p>\n Features and benefits<\/strong><\/p>\n Specifications<\/strong><\/p>\n <\/p>\n The high torque loads of E-MTBs require tough components. The straighter chain line EX1 offers allows the use of a chain that is wider and more robust than those found on drivetrains not specifically engineered for E-MTBs. The 8-speed EX1 chain has been engineered to run quiet across the gear range and transmit more power to the rear wheel.<\/p>\n Specifications<\/strong><\/p>\n <\/p>\n Guide RE is SRAM’s optimized braking solution for today’s exciting category of E-MTBs, capable of handling the higher average speeds, more intense use and increased mass due to the presence of the motor and battery. It combines SRAM’s proven Guide R lever assembly with a powerful 4-piston caliper derived from the gravity-focused Code brakes. Guide RE provides real, usable on-trail control\u2014optimal power and modulation mean speed can be controlled in all terrain and in all situations, both uphill and downhill.<\/p>\n <\/p>\n<\/a><\/p>\nBold new world<\/h2>\n
EX1 E-Crank<\/h2>\n
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XG-899 E-Block Cassette<\/h2>\n
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EX1 X-Horizon Rear derailleur<\/h2>\n
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EX1 Chain<\/h2>\n
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Guide RE<\/h2>\n
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