- The Riser Crown Race offers 5mm or 10mm of added height compared to a traditional crown race. It can be used to gain downtube clearance for fork crowns. The 5mm version typically reduces head angle by approximately 0.25º, while the 10mm version offers a 0.5º change though the exact effect will vary based on your bike's geometry. - The Riser Crown Race is compatible with any 1.5" headset using 45º bearings, giving you the flexibility to fine-tune your setup with ease. - Compatible with 45º bearings, 1.5" ID aluminum construction
