![CRUPI REAR HUB LOCK RING & SPACER KIT](http://www.adastrabikeco.com/cdn/shop/products/image_f23a2308-a407-4b81-91e2-1d043925f85f_{width}x.webp?v=1658597859)
Crupi Hub Lock Rings are Shimano compatible and require a Park F-R5 lock ring tool. Now available in black. A full set of spacers are included consisting of 1 * 3mm, 1 * 2mm, 1 * 1mm, and 1 * 0.5mm for a total of 6.5mm which along with the Crupi cog covers the driver completely.