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A high-quality designer track bicycle chainring with a unique tooth profile designed for maximum engagement and minimal wear. Manufactured in Peabody, Massachusetts, USA, from certified 6061-T6 aluminum plate stock. These chainrings are fully CNC machined. All edges (front and rear) are machine broken with a 45-degree 0.010-in deep chamfer. Product is packaged in brown paper with a QC certification label and number, and shipped USPS Priority Mail. More details and product photos are available at 44rn.com

Techical Details:
+Bolt Circle Diameter: 144-mm
+Number of Teeth: 47
+Supported Chain Type: 1/8-in Track/BMX
+Material: Anodized 6061-T6 Aluminum
+Finish: Black or Clear Anodized
+Total Run Size: 50pcs [30 Clear/20 Black]

Now shipping internationally!!

RELEASE 0B NOTES:
I put together a pre-order through Prolly Is Not Probably for a second release of this product, however; my minimum order for parts was more than I sold (by only 17 pieces), so I'm continuing the pre-order in my store here until they are gone. CHAINRINGS ORDERED WILL BE SHIPPED THE WEEK OF 12/12/2011. The 0B release of the 144#47 chainrings are identical to the 0A release except I have tightened up some of the locating features (ie: crankset spider inner diameter, bolt circle counter-sinks and through holes) for an improved fit.

I do not have a future run planned for this product after this one. So...if you want one get it now.

12/20/2011 - BLACK rings are sold out. Thanks!

1/18/2012 - ALL RINGS SOLD OUT. NO FUTURE RUNS PLANNED.

Thanks Everyone!