Rennen Decimal BMX Chainring-4-Bolt 104 BCD standard seating The Sinz Titanium Square Tapered

The Sinz Titanium Square Tapered Euro Bottom Bracket is designed for 68mm Euro bottom bracket shells and square tapered crank arms

40mm - 5oz/142g

sealed bearings

Axle Width - mm: 110

variable stack heights between 7-30mm possible

Rennen Decimal BMX Chainring-4-Bolt 104 BCD standard seating The Sinz Titanium Square TaperedRennen 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