Check the listing for details. Crupi Rhythm Wheel Ceramic Bearing - HSC Ceramics. Condition: New. Listed at 29.61 USD. HSC Ceramics is proudly Australian owned Designed by HSC Ceramics Australia in Melbourne Assembled in Australia HSC's ceramic components are manufactured to the highest standard for quality and accuracy before they are assembled by our experienced mechanics in Melbourne. We inspect each ceramic bearing before shipping it to you. Use what Olympians and World Champions use. Now you are one step closer to the speed you have long been dreaming for! Crupi Rhythm Wheel Ceramic Bearing - 6900, 6000, 6001 Features: 3-5 times longer lifetime than steel bearings; 5-9 watts energy saving with the wheel ceramic bearing upgrade; Grade 3 Si3N4 ceramic balls - 8 times rounder and 4 times smoother than steel balls; ABEC 7 - mirror polished alloy steel bearing races lead to extremely lower friction; C 3 clearance - less vibration and smoother riding; Designed for BMX Use; Crupi Rhythm wheels mainly use 6900, 6000, 6001 bearings. Please select the bearing sizes from the drop down list and add the quantity. We have listed up some examples of the bearings for your reference. Rhythm front hub bearing - 6900 Rhythm rear hub bearing - 6000 Rhythm Section Pro rear hub bearing - 6001 You own a HSC product, you own a HSC team!