Rennen 4 Bolt Chainring Not Threaded

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Rennen 4 Bolt Chainring Not Threaded The Rennen BMX 4-bolt chainring is machined from aircraft grade 7075-T6 aluminum in the USA by the Rennen Design Group. Built-in chainring bolt nuts eliminate the need for a chainring bolt wrench. Compatible with 8 & 9 speed chains. Specifications: Teeth: 3/32" Bolt Pattern: 104mm Weight: 3.8 oz Show more