FWI , the Sugion POE-110 OEM(matte) and I beleive the PE110(silver
polish) also rings have superior clearance between big and small ring to
any I have seen due to the big ring shape , which is unlike others
including the basic cheap Sugino ones. They are not just pure flat, they
have an offset mold . I was not impressed with TA rings myself for this
reason, I could not use a 36t mid ring and my 13t cog on a 7sp. FW, even
with the 15t the chain was grazed. So if you have ever used an XD for
example with basic Sugino rings you've possibly needed some spacers for the
rings because the poor clearance. Riv used to furnish these on their XD's
sold with the basic rings for this reason. If you buy one with the OEM
POE-110 rings no spacer is needed.
The PE110-S are their high end 7075 rings and OEM on the Mighty cranks.
These are the rings that also were on the Alpina/Cospea. The rings on the
Alpina2 and XD are the POE-110 matte finish rings , not 7075 auminum
however.
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