How long does it take to change arearwheel bearing

Intech Bearing company had the bearings available that I needed at a fair price. And they offered online purchase with in store pickup. It is still too early to give the bearings a fair review.

Item: 6203-2RS C3, SKF Brand Radial Ball Bearing, Bearing Type: Deep Groove Radial Sealed Bore Dia.: 17mm, Bore Tolerance: +0/-.007 mmOutside Dia.: 40mm, Outside Dia.: Tolerance+0/-11 micronWidth: 12mmABEC Tolerance: 1Dynamic Load Capacity: 2,200 lb.Static Load Capacity: 1,100 lb.Max. RPM: 24,000 (aka: limiting speed)Temp. Range: -40 Degrees to 212 Degrees F.Bearing Material: 52100 Chrome SteelCage Material: Pressed Steel Seal Material: Nitrile/Buna Synthetic Rubber Lubrication: EM Poly Grease Industry Number: 6203 2RS JEM C3

A New Carbon Nanotube coating could reduce friction and wear to zero.by Dawn Levy, Oak Ridge National LaboratoryScientists at the Department of Energy's Oak Ridge National Laboratory have invented a coating...