21 Orbea Wild FS M20 gearing options?

[Chrisk7]

I have a 21 Orbea Wild FS M20 and was wondering if there are options to add a larger front drive sprocket to this model? For where and how I ride I would like maybe one to 3 more teeth on the front sprocket. Can I do this without lengthening the chain?
What are my options and has anyone else done something like this, what's all evolved?

Any tips or links greatly appreciated as I am fairly new to the bicycling world.
Thanks.
Chris

 

[Randomdave]

Yeah, I'd love to go to a 36 or 38 tooth. Seems like that would be a little easier on the lower gear cogs in the cassette... I barely use 1-5 cogs now.
Wolf Tooth has some options I'm looking at currently. They make solid components, but not sure if it's emtb-ready or not.

 

[Chrisk7]

Does anyone know what chain ring type, model, brand to get for the 2021 model Orbea FS M 2O?
I can't seem to find what is on the bike.
All I can find on the specs is that it has a PW EB04-NW32 G4 Crankset.
Is that what I need to match a chainring to?
Is that a Shimano type?

From the aftermarket chainrings that I have found I need to know
what the BCD is
tooth profile,

• Drop-Stop A
• Drop-Stop B
• Drop-Stop ST
• mount type, and shape
• Elliptical or round.

Being new to bikes this is all a bit confusing to me.

I have a 32 tooth chainring now and would like to go up to at least a 34 or 36 if possible.

 

[Mteam]

Does anyone know what chain ring type, model, brand to get for the 2021 model Orbea FS M 2O?
I can't seem to find what is on the bike.
All I can find on the specs is that it has a PW EB04-NW32 G4 Crankset.
Is that what I need to match a chainring to?
Is that a Shimano type?

From the aftermarket chainrings that I have found I need to know
what the BCD is
tooth profile,

• Drop-Stop A
• Drop-Stop B
• Drop-Stop ST
• mount type, and shape
• Elliptical or round.

Being new to bikes this is all a bit confusing to me.

I have a 32 tooth chainring now and would like to go up to at least a 34 or 36 if possible.

Fitment

You need to check how the current chain ring is mounted to the motor, on some bikes they are mounted directly to the motor spindle, and on others the chain ring mounts onto a separate spider which mounts to the motor. You can tell if its the seperate spider by the fact it will have 4 bolts connecting the ring to the spider

All the wild fs that I have seen (including my own) the chain ring mounts onto a separate spider, so I would assume yours is like this , if it is then any 104bcd chainring will fit the spider as long as its not so large that it fouls the chainstay or other part of the frame, as the suspension moves.

If you dont have the separate spider then you need a direct mount chain ring suitable for a bosch cx gen 4 motor - I dont think wolf tooth make a direct mount chain ring for the bosch cx gen 4

Tooth profile

Your bike has 12 gears , therefore you need a chinaring that is compatible with 12 speed chains, The wolf tooth range of chain rings differentiates between shimano chains and sram chains, if you have a shimano 12 speed chain you should use their drop stop st range, if you have sram chain then their drop stop b range (more details here Wolf Tooth renames narrow-wide chainrings Dropstop A, B & ST based on compatibility - Bikerumor). I think (but do check - read the markings on the links) you wild has a shimano chain, so you want drop stop ST.

In reality the tooth profile doesnt matter too much, I suspect a drop stop st ring would work just fine with an sram chain and vice versa. Just get a ring that states it is for 12 speed .

Elliptical or round

For an e bike you want a round ring, the motor is turning the chainring independently of the crank arm position, so there is no point going for an eliptical ring on an ebike .

On a normal bike you may like the feel of an eliptical ring - I do, they're nice, smooths out the pedal stroke a bit, and seems to feel easier grinding up a steep slope.

chain length

If you just went to a 34 tooth ring, you'd probably getaway with reusing the existing chain, going bigger than 34 tooth, then you'd have to suck it and see. you need to check that the derailluer isnt fully stretched out when in the biggest cog on the cassette with the suspension fully compressed.

 

[Chrisk7]

Thank you so much for the replies, that really helps clear things up for me.

 

[Another One]

Sram should be a direct fit no.

X-SYNC 2 Chainrings - CR-XSNC-B1 - SRAM

X-SYNC 2 Chainrings, CR-XSNC-B1, SRAM. The radical new look and feel of the X-SYNC 2 chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characterist...

www.sram.com

 

[JoRo]

Good morning, what kind of chainring do i have to buy for a Wild Fs 2020 12sp shimano? I can't find the original one