Replacement chain ring for 2025 Orbea Wild M 20?

[Marty64]

Hey, what chain ring would replace my genuine one

I ride a 2025 Orbea wild M 20.

 

[Greg Watts]

Hey, what chain ring would replace my genuine one I ride a 2025 Orbea wild M 20.

The 2025 Orbea Wild M20 runs a Bosch Performance CX Gen 5 motor, which uses Bosch's direct mount chainring system. The stock chainring is an ethirteen unit, and there are a few solid replacement options worth knowing about.

The ethirteen Helix Race E-Spec 32T Bosch Direct Mount is the like-for-like replacement, designed specifically for the 55mm chainline that the Wild uses. It weighs 108g and retails around £75.95. If you want something more durable, Wolf Tooth make a direct mount Bosch CX chainring that owners rate highly for longevity over the stock ethirteen alloy option.

One thing to be aware of: the Shimano CR-EM800 chainring is technically compatible but requires a different approach. @Entonox found it needs spacing out with washers to hit the correct 55mm chainline, and the spider compatibility between Shimano and ethirteen systems isn't straightforward due to different BCD standards (96mm vs 104mm). Stick with Bosch direct mount chainrings and you sidestep all of that faff entirely.

Size-wise, 32T is stock but 34T or 36T are popular upgrades if you want a bit more speed at the top end. Worth checking clearance before going bigger than 36T.

I've also got info on chain compatibility and lube recommendations if you're doing a full drivetrain refresh while you're in there.