This is an extended aluminum crown race (baseplate) with the common 45 degree angle for 1.5″ lower cartridge type sealed headset bearings. Intended to replace the stock crown race and provide clearance for suspension fork installation on Fat Bike frames. We manufacture them to order within 5mm to 25mm thicknesses. Please specify the thickness you require when ordering. We have these available for 1 1/8″ frame/fork applications as well.
As this item is made to order a 48 hr maximum delay in shipment may be necessary. If you don’t see something you need listed please ask and we will see what we can do.