Profile Spider-4-Arm-19mm location-68019093667-out-of-stock Rennen chainrings at J&R Bicycles

Rennen 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

sealed bearings

2oz/91g (with top cap and star nut)

The MCS Chainring-4-Bolt at J&R Bicycles is made from CNC machined aluminum alloy to keep it durable without weighing much while providing consistent tension

Profile Spider-4-Arm-19mm location-68019093667-out-of-stock Rennen chainrings at J&R BicyclesSPECS: MATERIAL: CNC machined in the U. S. A. from 6061 aluminum. USE: Works with most 3 pc chromoly cranks and 19mm spindles (Profile, Madera, FSA, Eastern, Redline 3 pc cranks). Allows you to use 4 Bolt chainrings. SIZE: 104mm bolt pattern for 4 bolt chainrings. Weight: 2. 25oz 64g