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TRP and Bosch have collaborated on an electronic drivetrain for both road and mountain that will shift automatically and be powered by Bosch’s battery.
TRP has collaborated with Bosch on a new electronic drivetrain for e-bikes equipped with Bosch motors. The TRP Bosch E.A.S.I. A12 uses a TRP-made electronic rear derailleur powered by the e-bike’s Bosch battery. But that’s just the beginning.
TRP is the high-end arm of Tektro; it stands for Tektro Racing Products. The TRP Bosch E.A.S.I. A12 is a 12-speed drivetrain. Though we’ve seen photos of integrated control levers for road and gravel e-bikes, TRP shows the drivetrain on an eMTB on their website. They show two cassettes; one features a 520 percent range (10-52t). The other features a slightly narrower 11-50t setup. Among the features that TRP touts on the site are automatic shifting so that you never have to think to shift. Riders can use Bosch’s Flow e-bike app to set their target cadence in case they choose automatic shifting. Manual shifting is, of course, an option, but so is a temporary manual override for riders who choose automatic shifting.
Perhaps the most intriguing feature of the drivetrain is the torque reduction it performs when shifting. The higher the torque the drivetrain is under when shifting, the more wear the drivetrain suffers. By reducing the amount of torque the motor produces while shifting, drivetrain longevity is increased. The shifting tends to be smoother and quieter as well.
The wireless shifter features a classic two trigger design. The shifter communicates via CMD technology and it runs on a CR-2032 watch battery.
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As we mentioned, we’ve seen photos of integrated control levers that feature a two-paddle design similar to Shimano’s road STI levers, but we have yet to see what sort of cassette it would be paired with. As they haven’t shown a front derailleur, we suspect this will be a strictly 1x system. We also suspect that this will be appearing on e-bikes that retail for $4000 and up.
This is an exciting development and considering the hold Shimano has on the industry, it would be healthy for suppliers to have an alternative to the bike industry’s dominant drivetrain supplier.
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