Tektro ED9 shifts gears in ultra-durable 9-speed e-bike drivetrain, teases TRP TR12 update

Tektro’s all-new E Drive 9-speed mountain bike drivetrain promises improved durability for the high-stress life of an e-bike’s chain & cassette. With high-performance tech of more pricey MTB groupsets, the entry-level ED9 also includes an easily replaceable 3-cog cluster in the cassette to account for the most common e-bike drivetrain wear.

The production ED9 rear derailleur also hints of the revised layout of an anticipated TRP TR12 groupset update…

Tektro ED9 long-wearing 9sp e-bike drivetrain

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset,

c. Tektro

Developed together with e-bike maker Conway, Tektro’s new ED9 e-bike drivetrain combines DH derailleur & shifting tech from their premium TRP family with a long-wearing steel 9-speed cassette for extra durability and lower lifetime cost.

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 groupset on Conway eMTB

Tektro says their e-bike partners were looking for a longer-wearing drivetrain. Especially on entry-level models, e-bike makers see increased wear in the smallest cogs, since riders often stay in those harder gears, relying on Turbo mode support to get going again from a stop. All that strain across the smaller number of teeth often results in costly early cassette replacement, while much of the cluster is unworn, reserved only for pedaling up the steepest inclines.

Tech details

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset, cassette cogs

Like many low-cost groups, Tektro ED9 gets a pinned, stamped steel cassette. But its three smallest cogs are built tougher as individual steel cogs like in more premium cassettes, so they can be easily swapped out when worn. It’s a relatively simple and low-tech solution, but should save e-bike riders in service costs over time.

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset, cassette

The 545g steel 9-speed cassette comes in one wide 11-46T gearing spread, with replaceable 11/13/16 cogs.

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset, rear derailleur

The Tektro E Drive 9-speed groupset includes two steel cage rear derailleurs to choose from, with 12T pulleys. Pick either the 361g M350 with a non-adjustable clutch inheriting TRP DH7 / TR12 chain retention tech, or the lighter 344g T350 derailleur without a clutch.

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset, shifter

A simple 105g ED9 thumb shifter cycles through the 9 speeds, with a max 3 gear downshift.

TRP TR12 rear derailleur prototype

TRP TR12 rear derailleur prototype, spotted in 2021

Interestingly, the parallelogram layout of this new ED9 derailleur looks more like the next-gen TRP TR12 derailleur prototype we spotted last fall, minus the external adjustment levers. Perhaps with the simpler ED9 version already available on consumer e-bikes starting next month, we can expect to see an official TRP TR12 launch in the very near future, as well.

Tektro ED9 e-bike drivetrain – Cost & availability

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset

For the time being it looks like the Tektro ED9 drivetrains are exclusively an OEM option on Conway’s Cairon hardtail eMTBs & trekking e-bikes this season, for example on the 3500€ Cairon S 5.0. Since the components aren’t available separately, we don’t have real groupset retail pricing.

Tektro ED9 e-bike drivetrain, low-cost long-wearing E Drive 9 eMTB groupset, Conway

2022 Conway Cairon S 5.0 eMTB with Tektro ED9 drivetrain

But Conway does spec them in between models with low-cost SRAM Eagle drivetrains, putting the Tektro ED9 cheaper than NX Eagle but more expensive than SX Eagle, for some comparison.

The new 2022 Conways are online now, and will be available in dealer shops throughout Europe in February.

Tektro.eu

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Blake
Blake
10 months ago

Can you define “ultra durable”? Are there test results that back this up or is it only based on being a le to replace the 3 smallest cogs, something that can be done with many older cassettes if you can find parts.