Rohloff setup, crankset spinning when bike is pushed.

polishbiker
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Rohloff setup, crankset spinning when bike is pushed.

Postby polishbiker » Thu Mar 30, 2017 8:22 pm

Hi there people with rohloff equipped bikes : )

I had my thorn for 4 years now and used it quite a bit but i cannot remember if the crank used to spin when the bike is just being pushed or not.

I noticed it today, is it normal?
I am due to replace the chain and the bearings (phil wood) were replaced about 2000kms ago by a bike shop.

a) nothing to worry about
b) loose/worn chain
c) loose BB bearings?
d)?

Any input is welcome.

Thank you.

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RonK
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby RonK » Thu Mar 30, 2017 9:05 pm

Normal. One of the annoying things about them.
Shows how much internal drag they have.
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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Fri Mar 31, 2017 10:42 pm

Mine has done it since I've had it.

Huge PITA.

Its one of my biggest dislikes about the Rohloff as many is the bruised shin/ankle/calf I've received from simply trying to push my bike uphill.

Still, other than a couple of oil changes...........
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

polishbiker
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby polishbiker » Tue Apr 04, 2017 10:41 am

Thank you for your input : )

robbo mcs
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby robbo mcs » Tue Apr 04, 2017 6:36 pm

mine doesn't do this so obviously some variability

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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Sat Apr 08, 2017 2:52 pm

I'm unsure if theres a cause (and affect).

Mines a CC version (quick release) if its a notable correlation.

I've a vague recollection of reading tightness at the dropouts being a possible factor.

As my Ogre utilises horizontal dropouts, I have to use a really tight QR torque or suffer movement (side twisting) within the dropouts.

I also utilise a couple of tug nuts to minimalise this but still have to really be assertive with the QR.

I figure this might be a part of the problem but its a little late in the day to start wishing I'd bought a solid axle version.

I believe Surly are now recommending the solid axle version for the Ogre, if a forum post I read is accurate.
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

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Gray
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Gray » Wed Apr 12, 2017 11:33 pm

Glad this was mentioned, I'm new to Rohloff, and this does annoy me a bit. I like the left pedal at 6 o clock before I mount the bike. If I push it a little first the pedal is no longer in position.

Trevtassie
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Trevtassie » Thu Apr 13, 2017 1:42 pm

A little drop of oil on the inside of the drive sprocket seems to help with seal drag...

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Leaf T
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Leaf T » Fri Apr 14, 2017 11:56 am

My speedhub does it too. Can be annoying at times but only minor. I'm using quick release version with Pitlock skewers.

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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Sat Feb 17, 2018 4:22 pm

polishbiker wrote:Hi there people with rohloff equipped bikes : )

I had my thorn for 4 years now and used it quite a bit but i cannot remember if the crank used to spin when the bike is just being pushed or not.

I noticed it today, is it normal?
I am due to replace the chain and the bearings (phil wood) were replaced about 2000kms ago by a bike shop.

a) nothing to worry about
b) loose/worn chain
c) loose BB bearings?
d)?

Any input is welcome.

Thank you.


Has your recent work at Quantum Cycles made any difference to your cranks spinning when pushing the bike Pawel :?:
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

polishbiker
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby polishbiker » Sat Feb 17, 2018 6:13 pm

keeps spinning when you just push the bike, with this new seal the drag is more noticable, meant to break in within 2000km, did an 80km ride today to see whether i can ride like this, felt ok.

When bike is stationary and you spin the crank backwards by hand it doesnt rotate freely, just stops straight away ha ha....to give you an idea of the drag.

unfortunately there is still a leak ;/

back to the shop on monday.

polishbiker
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby polishbiker » Sat Feb 17, 2018 6:31 pm

Actually AIdan,

I am just riding around at the moment to break my new B17 saddle and to monitor this leak.
Maybe i will venture North next weekend if you are around : )

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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Sat Feb 17, 2018 11:20 pm

polishbiker wrote:Actually AIdan,

I am just riding around at the moment to break my new B17 saddle and to monitor this leak.
Maybe i will venture North next weekend if you are around : )


I'll PM you my number.

If your up this way, you can give me a ring to see if I'm about. :)
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

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Wingnut
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Wingnut » Mon Feb 26, 2018 3:43 pm

1st world problems...rider the sucker and you won't even notice it...

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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Tue Feb 27, 2018 5:49 pm

Wingnut wrote:1st world problems...rider the sucker and you won't even notice it...


Until you come to a hill your can't ride up and whist pushing, you lose concentration on the spinning cranks and one cops your shin or calf. :twisted: :lol: :lol:
Its my pet hate about my Rohloff but in no way a deal breaker. :D
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

Rodgerbiltit
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Rodgerbiltit » Wed Feb 28, 2018 8:35 am

polishbiker:
keeps spinning when you just push the bike, with this new seal the drag is more noticable, meant to break in within 2000km, did an 80km ride today to see whether i can ride like this, felt ok.

When bike is stationary and you spin the crank backwards by hand it doesnt rotate freely, just stops straight away ha ha....to give you an idea of the drag.


rifraf:
Until you come to a hill your can't ride up and whist pushing, you lose concentration on the spinning cranks and one cops your shin or calf. :twisted: :lol: :lol:
Its my pet hate about my Rohloff but in no way a deal breaker. :D


In my experience there is a direct relationship between the degree of torque on the Rohloff to rear dropout mount (quick release etc) and the amount of crank rotation/seal drag apparent. Might have to mount a hook/loop strap to the left chainstay to secure the crank arm when I'm pushing through all that sand!!

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rifraf
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby rifraf » Fri Mar 02, 2018 4:54 pm

Rodgerbiltit wrote:
rifraf:
Until you come to a hill your can't ride up and whist pushing, you lose concentration on the spinning cranks and one cops your shin or calf. :twisted: :lol: :lol:
Its my pet hate about my Rohloff but in no way a deal breaker. :D


In my experience there is a direct relationship between the degree of torque on the Rohloff to rear dropout mount (quick release etc) and the amount of crank rotation/seal drag apparent. Might have to mount a hook/loop strap to the left chainstay to secure the crank arm when I'm pushing through all that sand!!


The joys of Surly's horizontal dropouts means I have to apply plenty of torque compared to a vertical dropout bike.

Failure to do this sees movement and twisting in the dropouts.

I'd rather put up with the spinning cranks although I suspect there may be some detriment to doing this over time.

I utilise two Surly Tug-nutz to minimise said twisting despite Surly suggesting only one is necessary recommending the drive side if memory serves.

Two seems to have helped but I'm still very cautious about where I stand on the pedals, especially in situations utilising high torque.
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

Scintilla
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Re: Rohloff setup, crankset spinning when bike is pushed.

Postby Scintilla » Sat Mar 03, 2018 7:53 pm

polishbiker wrote:Hi there people with rohloff equipped bikes : )

I had my thorn for 4 years now and used it quite a bit but i cannot remember if the crank used to spin when the bike is just being pushed or not.

I noticed it today, is it normal?
I am due to replace the chain and the bearings (phil wood) were replaced about 2000kms ago by a bike shop.

a) nothing to worry about
b) loose/worn chain
c) loose BB bearings?
d)?

Any input is welcome.

Thank you.

Nothing to worry about.

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