Check the listing for details. Cane Creek 40 Series Headset Bottom. Condition: New. Listed at 30.99 USD. Product description CANE CREEK 40 SERIES HEADSET BOTTOM The 40-Series sets the standard for performance, durability and value. Drawing from the Premium 110-Series Design, the 40-Series incorporates all the features necessary for a durable, light-weight, long-lasting headset. To make it easier, we developed consistent graphics, interchangeable parts and over 40 configurations to meet almost every need. Sold in straight and tapered assemblies or tops & bottoms, Cane Creek's 40-Series offers the largest fitment range of any headset line on the market. Precision engineered by Cane Creek in Fletcher, NC. The Cane Creek 40-Series IS52 Bottom Headset fits 1.5'' Integrated headtubes and 1.5'' steerer tubes. Features Cups and Covers: 6061 T-6 Aluminum Internally relieved to reduce weight Covers: Tall and short aluminum and carbon covers offered on many IS and ZS models Crown Race: Durable steel crown races All complete Cane Creek headset assemblies (top or bottom) will use a 36x45 degree contact angle bearing, with the exception of our IS47/33 and EC44/33 headset assemblies. IS47/33 and EC44/33 will use a 45x45 degree contact angle bearing. Interlok®: Interlok® spacer compatible Clip Seal: Innovative Clip-Seal completely seals the top assembly and captures the compression ring to reduce the number of loose parts Face Seal: High-quality, low friction face seals on the crown races Stack Heights: External Cup (EC) — 16mm top, 12mm bottom ZeroStack (ZS) — 8mm or 15mm top, 4mm bottom Integrated (IS) — 9mm or 15mm top, 1mm bottom Bearings: EC30 will take a 38mm bearing EC34 will take a 41mm bearing ZS44 will take a 41mm bearing ZS49 will take a 41mm bearing EC44/40 will take a 52mm bearing EC44/33 will take a 47mm bearing EC49 will take a 52mm bearing ZS56 will take a 52mm bearing ZS62 will take a 52mm bearing IS41 will take a 41mm bearing IS42 will take a 42mm bearing IS52 will take a 52mm bearing