Rollcii makes these lovely 1x rings. They sort of have that fun Soviet Block design firm vibe. Like they were listening to bootleg copies of Switched on Bach and wearing black market Levis when they were designed. 1x, so you can run these with chains up to 11 speeds. If you wanna use it as a singlespeed, go 3/32, not 1/8th for your chain. 5 bolt, symetrical, 110bcd, which means it works for tons of nice cranks, including the Rollcii 13 cranks, Sugino Alpina and XD cranks, Carmina's with 110 bcd spiders, Rivendell's cranks, etc.
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