I was just in the process of changing the chainring on my Orbea Rise M-Team - It came with the E*Thirteen E*spec 32T chainring and I purchased another one to replace the original.
The OE chainring had reliefs on each of the 5 "spoke" ribs on the back side of the chainring for clearance for the chain guide screw heads.
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The new chainring does not have these reliefs. Upon installing this new E*Thirteen e*spec 32T chainring, it will appear to fit just fine.
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Once mounted, look closely at the amount of clearance between the "spoke" ribs and the chain guide screw head and you'll notice that the clearance is pretty tight. Picture below is the chainring with the relief.
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Now if you haven't already noticed, the EP8 spindle has some lateral play - if you press in on the spindle from the chainring side, it will probably move inward .010" to .020". I believe (but have not confirmed) that this lateral play is part of the EP8 design. The only problem is that now the chainring clearance to the chain guide screw heads has become to tight and may cause the chainring to rub on the chain guide screw heads. Here's the result.
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If you have replaced your OE E*Thirteen chainring with a replacement that does not have the relief in the "spoke" ribs, please check the clearance to the chainring screw heads, both as it sits and pushing in on the spindle from the drive side to check if lateral movement is apparent, does it cause the chainring "spoke" ribs to hit the chain guide screw heads. Also check the backside of the chainring "spoke" ribs for metal worn away from impact.
I have brought this issue to the attention of E*Thirteen, and they are baffled since they have not had any feedback of this problem since they redesigned the 32T chainring, removing the clearance reliefs. If you see there is a problem with your replacement E*Thirteen e*spec 32T chainring, please reach out to Chris at E*Thirteen, using the following email - support@ethirteen.com and let them know of the problem.
I originally replaced the OE chainring around the beginning of 2022 and didn't realize the difference in the way the chainring was made (reliefs vs no-relief/structural ribs) until last week when I was again replacing the chainring and noticed the "notches" worn into the "spoke" ribs shown in picture above. I also was not aware of the lateral movement in the spindle, which attributes to the lack of clearance, which is not noticed during installation.
Appreciate any and all feedback if others find the same issue exists - Thanks!
The OE chainring had reliefs on each of the 5 "spoke" ribs on the back side of the chainring for clearance for the chain guide screw heads.
The new chainring does not have these reliefs. Upon installing this new E*Thirteen e*spec 32T chainring, it will appear to fit just fine.
Once mounted, look closely at the amount of clearance between the "spoke" ribs and the chain guide screw head and you'll notice that the clearance is pretty tight. Picture below is the chainring with the relief.
Now if you haven't already noticed, the EP8 spindle has some lateral play - if you press in on the spindle from the chainring side, it will probably move inward .010" to .020". I believe (but have not confirmed) that this lateral play is part of the EP8 design. The only problem is that now the chainring clearance to the chain guide screw heads has become to tight and may cause the chainring to rub on the chain guide screw heads. Here's the result.
If you have replaced your OE E*Thirteen chainring with a replacement that does not have the relief in the "spoke" ribs, please check the clearance to the chainring screw heads, both as it sits and pushing in on the spindle from the drive side to check if lateral movement is apparent, does it cause the chainring "spoke" ribs to hit the chain guide screw heads. Also check the backside of the chainring "spoke" ribs for metal worn away from impact.
I have brought this issue to the attention of E*Thirteen, and they are baffled since they have not had any feedback of this problem since they redesigned the 32T chainring, removing the clearance reliefs. If you see there is a problem with your replacement E*Thirteen e*spec 32T chainring, please reach out to Chris at E*Thirteen, using the following email - support@ethirteen.com and let them know of the problem.
I originally replaced the OE chainring around the beginning of 2022 and didn't realize the difference in the way the chainring was made (reliefs vs no-relief/structural ribs) until last week when I was again replacing the chainring and noticed the "notches" worn into the "spoke" ribs shown in picture above. I also was not aware of the lateral movement in the spindle, which attributes to the lack of clearance, which is not noticed during installation.
Appreciate any and all feedback if others find the same issue exists - Thanks!
