Hi Greg, is there an alternative for the Rocky Mountain Powerplay 2022 outpüt cog? (11 tooth)

[Eddy1960]

Hi Greg, is there an alternative for the Rocky Mountain Powerplay 2022 outpüt cog? (11 tooth)

 

[Greg Watts]

Hi Greg, is there an alternative for the Rocky Mountain Powerplay 2022 outpüt cog? (11 tooth)

Hi @Eddy1960 - welcome aboard. Honest answer: that output cog (sometimes called the transfer/motor cog) is a Dyname-specific part, not a standard Shimano/SRAM 11t that you can grab off the shelf.

Rocky Mountain treat the output cog as an intended wear item, same category as the chain sliders, so the proper replacement is the genuine RM part rather than a generic substitute.

For your 2022 Instinct Powerplay (Dyname 4.0), the part you want is the Output Cog Assembly for Dyname 4 - Rocky Mountain part code RMROCAD4, ref. 1812016.

It's listed as compatible with the Altitude Powerplay Alloy/Carbon 2022 and the Instinct Powerplay Alloy/Carbon 2022 - so it's the correct fit for your bike.

Two things worth knowing: • Don't grab a Dyname 3 cog by mistake. There's a separate Output Cog Assembly listed for the older Dyname 3 system - yours is the Dyname 4 one. They're not the same part.

• Why a generic 11t won't do: it isn't a normal drivetrain sprocket. Those teeth transfer only the motor's power (acting like an idler), unlike a Bosch-style setup where the equivalent cog passes both motor and rider power - so the tooth profile and assembly are specific to the Dyname drive, not interchangeable with a cassette cog.

On the forum someone did muse that a worn Dyname cog can look oddly profiled and even resemble "a Shimano 11t mounted the wrong way," but that was a camera/lighting illusion on the genuine part - not a sign you can substitute one. If yours is genuinely worn (no noise but visibly hooked teeth), it's a straightforward home-serviceable swap, which is one of the nicer things about the Powerplay drivetrain.

Best bet is to order RMROCAD4 through a Rocky Mountain dealer or via bikes.com. If you can get the markings or a photo of your current cog, happy to sanity-check it's the Dyname 4 part before you buy.

 

[Eddy1960]

Hi @Eddy1960 - welcome aboard. Honest answer: that output cog (sometimes called the transfer/motor cog) is a Dyname-specific part, not a standard Shimano/SRAM 11t that you can grab off the shelf.

Rocky Mountain treat the output cog as an intended wear item, same category as the chain sliders, so the proper replacement is the genuine RM part rather than a generic substitute.

For your 2022 Instinct Powerplay (Dyname 4.0), the part you want is the Output Cog Assembly for Dyname 4 - Rocky Mountain part code RMROCAD4, ref. 1812016.

It's listed as compatible with the Altitude Powerplay Alloy/Carbon 2022 and the Instinct Powerplay Alloy/Carbon 2022 - so it's the correct fit for your bike.

Two things worth knowing: • Don't grab a Dyname 3 cog by mistake. There's a separate Output Cog Assembly listed for the older Dyname 3 system - yours is the Dyname 4 one. They're not the same part.

• Why a generic 11t won't do: it isn't a normal drivetrain sprocket. Those teeth transfer only the motor's power (acting like an idler), unlike a Bosch-style setup where the equivalent cog passes both motor and rider power - so the tooth profile and assembly are specific to the Dyname drive, not interchangeable with a cassette cog.

On the forum someone did muse that a worn Dyname cog can look oddly profiled and even resemble "a Shimano 11t mounted the wrong way," but that was a camera/lighting illusion on the genuine part - not a sign you can substitute one. If yours is genuinely worn (no noise but visibly hooked teeth), it's a straightforward home-serviceable swap, which is one of the nicer things about the Powerplay drivetrain.

Best bet is to order RMROCAD4 through a Rocky Mountain dealer or via bikes.com. If you can get the markings or a photo of your current cog, happy to sanity-check it's the Dyname 4 part before you buy.

Thanks Greg, we live in the Netherlands and the cog is diifficult to get. That why asked the question. I will see if Bike.com has it. Thanks again. Eddy

 

[Greg Watts]

Thanks Greg, we live in the Netherlands and the cog is diifficult to get. That why asked the question. I will see if Bike.com has it. Thanks again. Eddy

@Eddy1960 - Netherlands can be a tough one for RM parts, you're not wrong. Rocky Mountain's European distribution network is the first port of call, but I should be upfront: I don't have a confirmed name for the EU distributor and I'd hate to send you chasing a dead end.

A few avenues worth trying: • Rocky Mountain's own website (bikes.com) - they have a dealer finder; a RM-authorised dealer in Europe should be able to order the cog through official channels even if they don't stock it.

• Contact RM directly via their support form at bikes.com - for a part as specific as the Dyname output cog, they're usually helpful pointing you to the nearest stockist.

• German RM dealers - Germany tends to have broader RM penetration than the Netherlands; a cross-border order for a small wear part is usually straightforward within the EU.

• RM forums and Facebook groups - Powerplay owners sometimes buy/sell spare wear parts, and someone may have a spare cog sitting in a drawer.

The one thing I'd caution: if someone online is selling a generic 11t and claiming it fits, I'd be sceptical. The Dyname output cog is a proprietary part - going off-spec on it is the kind of gamble that ends with a very expensive noise and a long walk home.

Good luck tracking it down, @Eddy1960 - hope the trails are worth the parts hunt!