Shimano should not do that. It should be rock solid!!The chainring has side to side play with the locknut tight. Like a floating brake rotor.
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Gotcha. You just hand tightened that, I see. Did you try applying 30nm of force on it?
The lockring was tight to begin with and the chainring was still loose, that was why I raised the question. The tech docs show no spacer, so it's either designed like this, or its missing a spacer that isn't shown in the tech docs, or it is assembled incorrectly although it seems to work fine.Gotcha. You just hand tightened that, I see. Did you try applying 30nm of force on it?
If it's still loose, might just need a spacer to actually apply pressure on the chainring.
Searched those model #s and one set said 50mm chainline, and the other set said 53mm chainline.I see from the tech docs that there are 2 spiders, perhaps they are different thicknesses and mine was spec'ed incorrectly
https://si.shimano.com/pdfs/ev/EV-FC-E8050-FCE8000-4068C.pdf
Appreciate that research ninjichorSearched those model #s and one set said 50mm chainline, and the other set said 53mm chainline.
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80.html
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80-R.html
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80-B.html
Look at how sellers list the chainring without spider:
https://www.bike-discount.de/en/buy...80-sm-cre80-b-chainring-without-spider-736216
I get the impression that the spider is merely offset by 3mm, to get the chainline optimized based on rear axle spacing (142 vs 148). I expect them to be made interchangeable with the motor, and not have incompatibility like how you speculated.
Thanks for the info ninjichor, it would make sense then that there should be a 3mm spacer on one side of the spider or other depending on chainline. This would also give one motor two chainline options. So I am guessing my motor is missing the spacer, but it is not in the tech docs anywhere. It would be great if somebody could look at their motor and see if there is a spacer on either side and if it is tight to the shaft.Searched those model #s and one set said 50mm chainline, and the other set said 53mm chainline.
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80.html
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80-R.html
https://bike.shimano.com/en-EU/product/component/mtb-ebike-e8000/SM-CRE80-B.html
Look at how sellers list the chainring without spider:
https://www.bike-discount.de/en/buy...80-sm-cre80-b-chainring-without-spider-736216
I get the impression that the spider is merely offset by 3mm, to get the chainline optimized based on rear axle spacing (142 vs 148). I expect them to be made interchangeable with the motor, and not have incompatibility like how you speculated.