The MRP Riser Crown Race offers 5mm (LowRise) or 10mm (HighRise) of added height compared to a traditional crown race. It can be used to gain downtube clearance for fork crowns, the Noken air-spring upgrade, or to adjust the geometry of your bike. The Riser Crown Race is compatible with any 1.5" headset using 36/45 bearings, giving you the flexibility to fine-tune your setup with ease.HighRise Riser Crown Race typically reduces head angle by approximately 0.5 degrees though the exact effect will vary based on your bike's geometryCompatible with 36/45 degree headset bearings1.5" I.D with 36 degree mating surface (Cane Creek, FSA, Chris King, etc.)Aluminum HighRise Riser crown race weighs 24gItem SpecificationsCrown Race40 MRP Riser Crown Race Crown Race UPC: 702430223874