Article [11] ST1100 - O-rings in the final drive (rear wheel)

Welp, Im looking to replace these along with my rear tire here soon. I'll see what I can find in bulk over here in the states, unless someone has a good source or better has the trio on hand I'll buy from to make comparisons or semi-scientific analysis.
 
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Okay, follow up question: the dimensions that are shown are they listing the OD or ID?
according to the web metric O-rings are generally spec'd by ID and cross-sectional dimension.

This place has the 61x2.0, and for the other two they have sizes very close. Looks like with minimum order you'll spend about $5 per O-ring size, around $15 total.

 
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I have new OEM rings on order to gauge their hardness, but will take a week or so...the small one is hard to find.

If I can get within +0.05/-0.00mm it should be acceptable for replacement.
 
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