Prestacycle UniBlock PRO Cassette - 12-Speed Shimano For HG 12 Freehub 11-34 Silver CS-RX1 Cassette } 120tpi casing with Aramid

} 120tpi casing with Aramid puncture protection - TechBELT EVO compound Slightly thicker tread base

and durable all winter long

0 is an uncompromising combination of protection and comfort

Mount to your quick release and create eyelets

Prestacycle UniBlock PRO Cassette - 12-Speed Shimano For HG 12 Freehub 11-34 Silver CS-RX1 Cassette } 120tpi casing with AramidPrestacycle UniBlock Cassettes are a single piece unit exquisitely machined from a solid block of cold forged Chrome Molybdenum alloy steel then heat treated tumble finished and electroplated for added durability and low friction operation. The 2 largest cogs on the 11 40 and 11 42 HG11 cassettes are crafted with one piece of high quality 7075 aluminum. Single block design allows Prestacycle to remove more unnecessary material making cassettes