Wheel rotation

[Debs]

1st prize must go to you Neil 

[snowy]

I'll be having nightmares over this now!   
The good ladys' told me that as my waistline increases I've been tending to buy bikes of bigger cubic capacity to compensate!   
But this proves it!  The size of the selected "all you can eat" breakfast (which we all know is the recommended calorie intake for a good days ride!  ) will adversely decrease the radius of the wheel, through weight gain, increasing wheel revs per distance, engine revs and wear / fuel used etc.etc.............aaarrrgggghhhh!
Might have to cut the breakfast down a bit...........just to a B.E.S.T bap (or Stottie, Nudger or Barm depending on locale'!) .........donna want to end up on a Triumph Rocket!     

[SirToU]

I've gone from an inline 4 to a v twin on the basis that the pistons are bigger to compensate for the bigger waistline!

and ignore all the other metrics!

:-)

Neil

[O.C.]

google is your friend!

http://www.csgnetwork.com/tiresizescalc.html

tyre circumference = approximately 88.1 inches = (88.1 x 25.4) = 2237.74mm or 2.237m

https://www.google.co.uk/#q=miles+to+km

1 mile = 1.609344km or 1609.344 meters

= distance (m) / circumference (m) = number of rotations

1609.344 / 2.237 = 719.37 rotations per mile or 7.2 million rotations per year for 10,000 miles of travelling!

this is on the assumption of no tire growth due to centrifugal force, no tyre wear, no corners - also based on car tyre size.... and rim size of 17"

but this will be close enough!


sorry!  couldn't resist!

Really ???   Where does this equation  provide for the effects on rolling circumference due to ambient temperatures and tyre pressures