Push Bike Backwards from shed, chain falls off

Willieverlovemybike

New Member
Region
United Kingdom
Hello - confused newbie seeking wisdom and happiness!

Background:
2017, as an overweight 60+ year old, I bought myself a pre-retirement ebike - Reiss & Muller R&M Delite GX Rohloff
The dealer I bought it from went bust early doors leaving me with no local dealership
I have done a small amount of miles since buying the bike (shuffles feet), maybe 500 or so.
Now, with 2021 retirement complete, I want to get out and about and fall in love with my bike
I am not clever or mechanically knowledgeable - hopefully I can describe my problem purposefully and reach out to you for help please...

Issue:
I have parked my bike in my shed since day 1 of purchase
I wheel the bike out (backwards), point it towards the gate and with some loss of dignity, wobble my way out onto the road
I have never had any issue with wheeling the bike out of the shed before
This week, I find my chain is repeatedly falling off

Closer inspection
As I push my bike out from the shed, I see the lower chain run (looping up and over the plastic roller guidance wheel) is travelling inwards slightly and pressing the inner edge of the plastic guidance wheel away from the frame
The plastic guidance wheel falls off and the chain falls off
A friend (non ebike), used his "chain measuring" tool and concluded there was minimal wear in my chain, the problem is with the plastic roller guidance wheel pulling away so easily from the frame

Help please?
1) Have I simply been lucky all these previous times pushing the ebike out of the shed, that the chain has never fallen off before?
2) Is it natural/normal for the plastic roller guidance wheel to be so easily pushed aside by the chain links so that the plastic roller wheel and the chain drop off?
3) Between 2017 and 2021, have there been any design improvements to the Delite Rohloff that I can upgrade to and provide better / more secure chain alignment?

Objective
To understand if the chain should so easily displace the plastic roller wheel so both fall off
To feel confident, once I have pushed the chain back on, I can (forwards) pedal and this chain displacement issue will not re-occur?

My thanks....
 

Attachments

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JRA

Well-Known Member
That lower roller should have a disc on the outside to stop the chain from jumping off. Looks like the right size fender washer might work there.

Sometimes if you have changed the shifting lever on a bike and roll it back the chain will jump around. Not sure if that is the case with a Rohloff however. Why it didn't do it before I don't know.
 

Willieverlovemybike

New Member
Region
United Kingdom
Hello - confused newbie seeking wisdom and happiness!

Background:
2017, as an overweight 60+ year old, I bought myself a pre-retirement ebike - Reiss & Muller R&M Delite GX Rohloff
The dealer I bought it from went bust early doors leaving me with no local dealership
I have done a small amount of miles since buying the bike (shuffles feet), maybe 500 or so.
Now, with 2021 retirement complete, I want to get out and about and fall in love with my bike
I am not clever or mechanically knowledgeable - hopefully I can describe my problem purposefully and reach out to you for help please...

Issue:
I have parked my bike in my shed since day 1 of purchase
I wheel the bike out (backwards), point it towards the gate and with some loss of dignity, wobble my way out onto the road
I have never had any issue with wheeling the bike out of the shed before
This week, I find my chain is repeatedly falling off

Closer inspection
As I push my bike out from the shed, I see the lower chain run (looping up and over the plastic roller guidance wheel) is travelling inwards slightly and pressing the inner edge of the plastic guidance wheel away from the frame
The plastic guidance wheel falls off and the chain falls off
A friend (non ebike), used his "chain measuring" tool and concluded there was minimal wear in my chain, the problem is with the plastic roller guidance wheel pulling away so easily from the frame

Help please?
1) Have I simply been lucky all these previous times pushing the ebike out of the shed, that the chain has never fallen off before?
2) Is it natural/normal for the plastic roller guidance wheel to be so easily pushed aside by the chain links so that the plastic roller wheel and the chain drop off?
3) Between 2017 and 2021, have there been any design improvements to the Delite Rohloff that I can upgrade to and provide better / more secure chain alignment?

Objective
To understand if the chain should so easily displace the plastic roller wheel so both fall off
To feel confident, once I have pushed the chain back on, I can (forwards) pedal and this chain displacement issue will not re-occur?

My thanks....

That lower roller should have a disc on the outside to stop the chain from jumping off. Looks like the right size fender washer might work there.

Sometimes if you have changed the shifting lever on a bike and roll it back the chain will jump around. Not sure if that is the case with a Rohloff however. Why it didn't do it before I don't know.
Thank you for the pick up JRA
I will research other 2017-2021 Delight gx Rohloff chain images and see if/how they may differ from mine.
 

Alaskan

Well-Known Member
If the roller is falling of because of chain pressure on the bolt or axle nut or whatever fastener that retains the roller on its shaft, has fallen out and needs replacement. Once the roller cannot move sideways of its axle or shaft the chain should stay in place without. The black plastic roller is supposed to be secured in place and should not be able to move off its shaft. You should not be able to take the roller off without removing a washer and nut that secure to threads on the outside end of the Axle/shaft or a smaller bolt and washer that threads into the shaft, or a possibly a snap-ring the sits in a groove at the end of the shaft with a washer and the roller inside of it.

Just get with an experienced mechanic to figure out how to secure the black plastic roller in place and all should be good.
 

Willieverlovemybike

New Member
Region
United Kingdom
Alaskan - that was informative and puts it into context for me.

interestingly, I did have pre build / delivery issues with the bike (right hydraulic brake leaking with loss of fluid/brakes)
Perhaps the chain guide roller was also in-expertly fitted and has taken this time to disengage.

My thanks.