Subject: Calculation of variation in kinetic friction of wheel bearings

I would like to know if it is at all possible to determine the changes in 
the kinetic friction of a wheel bearing from just having rotational 
displacement and time data of the wheel. The senario is one similar to 
having a cycle on stands and starting to pedal. The amount of "thrust 
force" on the wheel bearings change as a factor of the force applied to 
the wheel through the chain & pedals. This change will vary the wheel 
kinetic friction.I can determine the kinetic friction of the freewheeling 
wheel by tracking the displacement and time. If I then plot these values, 
the slope gives the acceleration, all I need to do then is multiply by the 
wheel inertia F=m*a. 

Re: Calculation of variation in kinetic friction of wheel bearings