Aurora MM-4 : Rod End, MM Series, Steel, 1/4"-28 RH Thread, Male, 0.250" Bore
AUR-MM-4
The Aurora Bearing product line features over twenty different series of rod ends in inch, or imperial dimensions. From the economy commercial CM series through the performance racing PRM series, Aurora has a standard catalog series bearing for every rod end need.
Products range in bore size from 1/8 to 2 inch, with threads from 6-32 through 2"-12. All feature one-piece, full-swage steel raceway construction, with the exception of the SPM/SPW series, which feature a proprietary low friction high wear resistance molded liner. Aurora PTFE liners are available in most series.
- Free domestic shipping over $99
Racing Helmets
| helmet | size | measurement | metric |
| XS | 6-5/8 to 6-3/4 | 20-7/8 to 21-1/4 | 53 to 54 |
| S | 6-7/8 to 7 | 21-5/8 to 22 | 55 to 56 |
| M | 7-1/8 to 7-1/4 | 22-3/8 to 22-3/4 | 57 to 58 |
| L | 7-3/8 to 7-1/2 | 23-1/8 to 23-1/2 | 59 to 60 |
| XL | 7-5/8 to 7-3/4 | 23-7/8 to 24-1/4 | 61 to 62 |
| 2XL | 7-7/8 to 8 | 24-3/4 to 25-1/8 | 63 to 64 |
CMR Helmets
| helmet | size | measurement | metric |
| XS | 6-1/2 to 6-5/8 | 20-1/2 to 20-7/8 | 52 to 53 |
| S | 6-3/4 to 6-7/8 | 21-1/4 to 21-5/8 | 54 to 55 |
| M | 6-7/8 to 7 | 21-5/8 to 22 | 55 to 56 |
| L | 7-1/8 to 7-1/4 | 22-3/8 to 23-3/4 | 57 to 58 |
Rookie Helmets
| helmet | size | measurement | metric |
| One size | 6-3/4 to 7 | 21-1/4 to 22 | 54 to 56 |
