Rennen Decimal Chainring-4-Bolt 104 BCD standard onyx Factory installed half-link for a

Factory installed half-link for a radically stronger set-up

Weight: 78g

CNC-machined bearing cover

Sealed Bearings

Rennen Decimal Chainring-4-Bolt 104 BCD standard onyx Factory installed half-link for aRennen chainrings at J&R Bicycles are precission machined from aircraft quality 7075 T6 aluminum (83% stronger than the 6061 many brands use) Rennen chainrings are 3 16" thick and are made for the stress of the top BMX racers and conditions. Only Rennen offers a single speed specific tooth profile that is designed to last longer and keep chains on. SPECIFICATION MATERIAL: U. S. A. Made 7000 Series Aluminum and CNC machined, specifically shaped teeth