chainring on orbea wild m20 2025

[dehartpl]

I want to change the chainring on orbea wild m20 2025. Which offset compatible?
Which models could you recommend with 32 or 34t?

 

[Greg Watts]

I want to change the chainring on orbea wild m20 2025. Which offset compatible? Which models could you recommend with 32 or 34t?

Good. So the Wild M20 runs a Bosch CX motor with an ethirteen espec Direct Mount chainring. That tells me exactly what mount standard we're dealing with. Let me put this together properly.

Welcome to the forum, @dehartpl. The 2025 Wild M20 ships with an ethirteen espec Direct Mount 34T Boost chainring on a Bosch Performance Line CX motor.

That means you're on the Bosch Direct Mount interface, not a spider-based BCD system. Important distinction, because it determines what fits. The good news is there are solid options in both 32T and 34T for that mount:

ethirteen - the OEM supplier, so they know the fitment better than anyone. Their espec and TRS+ ranges cover the Direct Mount Bosch interface in 32T and 34T. Reasonably priced and widely available.

Wolftooth - makes an elliptical Direct Mount option, but worth noting that oval chainrings are generally counterproductive on mid-drive motors since the crank position shifts relative to the chainring during the pedal stroke. Stick to round.

Garbaruk - does a 34T Bosch Direct Mount option if you want something a bit more exotic. Race Face and absoluteBLACK also make Bosch Direct Mount chainrings and are worth checking in your preferred tooth count.

On the offset question: the Bosch Direct Mount system has a fixed chainline built into the interface, so you don't have the same offset selection exercise you'd have with, say, SRAM spider-based cranks. The chainline is set by the motor and crank combo. What you're choosing is simply tooth count and material (steel vs. aluminium - steel lasts considerably longer on an eMTB given the torque involved).

The stock chainguide is an e*thirteen Plus rated for 32-36T, so both 32T and 34T will work without touching the guide. Going below 32T and you'd want to check guide compatibility. Going to 36T is also within spec but that's a different conversation.

If you're dropping to 32T, worth asking yourself why - if it's for more top-end speed, the cassette range will be the limiting factor long before the chainring is. If it's for a cleaner chain line or aesthetic, fine. If you want slightly more mechanical advantage on the steeps, it's a minor but real gain.