Vibrating feeling in crank and pedals

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ODC
Posts: 88
Joined: Mon Aug 14, 2017 9:40 am

by ODC

After the brake rub with my rear Enve wheel i have another problem with my new BMC Slr01 2018.
At certain times i have a vibrating feeling in my crank and pedals. I feel it really good in my feet.
First thing i checked where my pedals because i already rode 15000 with them but they seem to look good
What could this be?

- bb => bb86 ceramic speed coated (new)
- crank = SRM shimano 9000 power meter with ‘new’ 9000 chainrings 39/53
- groupset => ‘new’ dura ace 9150
- ‘new’ enve wheels with enve hub
- Shop deinstalled the normal hanger and installed the direct mount hanger for my rear derailleur

by Weenie


joejack951
Posts: 345
Joined: Fri Feb 18, 2005 6:50 pm
Location: Wilmington, DE

by joejack951

Very likely just new chain meshing with brand new chainrings and cassette cogs. It should smooth out after a few rides if it follows my experience with new drivetrains.

asiantrick
Posts: 122
Joined: Fri Dec 04, 2015 11:18 pm
Location: the OC, CA

by asiantrick

Did you end up getting the brake rub fixed on your Enve? Alot of annoying issues for such a new bike :(

ODC
Posts: 88
Joined: Mon Aug 14, 2017 9:40 am

by ODC

joejack951 wrote:Very likely just new chain meshing with brand new chainrings and cassette cogs. It should smooth out after a few rides if it follows my experience with new drivetrains.

And what are anfew rides?
Did already 700km with the bike but the feeling is still there.

jobvisser
Posts: 78
Joined: Sun Aug 14, 2016 10:24 am

by jobvisser

ODC wrote:
joejack951 wrote:Very likely just new chain meshing with brand new chainrings and cassette cogs. It should smooth out after a few rides if it follows my experience with new drivetrains.

And what are anfew rides?
Did already 700km with the bike but the feeling is still there.

A few rides would be 200km, try lubing the chain and jockey wheels, check if rear derailleur is aligned and if that does fix it try spinning the cranks without a chain on it and check if the pedals are smooth

Xyfas
Posts: 2
Joined: Thu Aug 24, 2017 4:21 am

by Xyfas

1. check the rear derailleur hanger alignment.
2. make sure the chain is threaded properly through the cogs.
3. check for grime/dirt in the chain, derailleur, cogs.

alcatraz
Posts: 845
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Certain times needs to be defined.

Is it in a particular gear?

Are there times when you don't feel the vibration?

What about putting a lot of load on the pedals compared to almost no load? (pushing hard/easy)

Does the vibration make a noise?

Are you possibly crosschained? Big ring - big cogw or small ring small cogs?

Check your wheels/cassette/pedals/crank for side to side play.

Are you familiar how to set the cable tension on a rear derailleur? (indexing)

Clues... give as many as possible. Is the vibration lower sometimes and higher other times? When? What are you then doing on the bike?

/a

ODC
Posts: 88
Joined: Mon Aug 14, 2017 9:40 am

by ODC

alcatraz wrote:Certain times needs to be defined.

Is it in a particular gear?

Are there times when you don't feel the vibration?

What about putting a lot of load on the pedals compared to almost no load? (pushing hard/easy)

Does the vibration make a noise?

Are you possibly crosschained? Big ring - big cogw or small ring small cogs?

Check your wheels/cassette/pedals/crank for side to side play.

Are you familiar how to set the cable tension on a rear derailleur? (indexing)

Clues... give as many as possible. Is the vibration lower sometimes and higher other times? When? What are you then doing on the bike?

/a

I have it on the 39 and on the 53 and on every gear.
It is more noticeable when putting more power onto the pedals. When push!ng very very easy i can’t really feel it. Also i feel it more on roads with new asphalt
No cable tension because it’s the electronic version
No play on the crank and pedals. Would be strange because they are new.
I have a little bit of play at my back wheel but not more then my other wheels.

alcatraz
Posts: 845
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

All I can think of is chain/cassette issues + rear wheel hub.

Borrow another rear wheel quick and see if it's still there. Preferably with a different cassette. Cassette/freehub/spokes might reveal some issue. Just find one gear that indexes correctly and do some testing in only that gear. Means even 10/9 speed wheels could perhaps be tested.

For example, I had a vibrating chain that was wearing out unevenly so checking chain stretch seemed all fine. But it still jumped and popped a bit every revolution. Possible the installer put an old chain on by mistake?

/a

Cleaner
Posts: 103
Joined: Wed Oct 28, 2009 7:13 pm

by Cleaner

Check the chain-ring bolts and that the rings are seated correctly on the spider. I have seen loose bolts allow the chain ring to wobble and at a high cadence this could feel like a vibration. Check it in a work stand while turning the cranks by hand, if this is the issue you will hear and feel it in the stand.

ODC
Posts: 88
Joined: Mon Aug 14, 2017 9:40 am

by ODC

My elite drivo is going to be delivered next week. That will be a good test to see and feel if the vibrations are still there when my rear wheel is removed.
If not then it’s gonna be a wheel/casette problem.
I think the problem is more at the crank because + i feel the vibration a lot more at the drive side then the non drive side.

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

This is interesting, because it sounds like I have the exact same issue on my commuter/gravel bike. In my case it certainly wasn't the crankset/chainring, because I've changed that and it didn't do anything. It feels like something to do with the bearings, but they're fairly new and BSA (easy install) so I doubt it.

Curious if you can figure it out!

ODC
Posts: 88
Joined: Mon Aug 14, 2017 9:40 am

by ODC

Maybe something worth mentioning is that i have never felt it when pushing power while standing on my pedals (out of the saddle).

sp3000
Posts: 174
Joined: Thu Aug 21, 2014 7:12 am
Location: Sydney

by sp3000

Check the cassette lock ring is tight.

by Weenie


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