Probably more important than rake, is how adjusting the ride height, front or rear, or a combination of both, affects the front ends static trail measurement.remember, lowering the front of the bike (even by decreasing the tire height) steepens the rake and raising it increases the rake.
So what was the point? Nobody is going to do your homework for you and there are lots of variables you can change. If you see it as limited to a few variables then you aren't thinking clearly. but more importantly, why are you asking this questions in a vacuum. I'm not going to do your math homework for you, so if that is what you wanted to start...well..why?This was a theoretical question... Everybody here are always mentioning rake/trail/wheelbase when speaking about geometry and handling but as i see it theres should be lot more factors to be considered. O1mark theoretically you can setup the same bike with different wheels (16/18; 18/16 or 17/17) so that rake and trail will remain the same- you must change the angle of swingarm and fork offset. In my example the numbers are from cbr600f3 specs and it uses 17/17 wheel setup.
Tanshanomi whats your point? Just verbal masturbation in public??
OK say you can change the fork offset, front and rear ride heights and keep the trail and rake the same in both instances.
Let's say you are talking about the same dimension tires other than diameter so the 18" wheel/tire combo is taller than the 16" wheel/tire combo.
The effect on the stability of the wheel and the motorcycle is most pronounced when riding over a bump or over and into a hole.
The velocity and acceleration of the tires and wheel (unsprung weights) traveling over bumps and holes will be greater in the smaller diameter combinations leading to a less "comfortable" ride.
The best example of this is trying to ride a scooter with 10 inch wheels over bumpy terrain. Shake your fillings out.
Monster trucks with huge tires driving over a speed bump. Don't even notice it.
Is this what you were getting at?
It's like playing what am I thinking...
:I find a 2.75x21 front and a 4.00x18 rear gets me over pretty much Any bump, if that helps :|
Yes a smaller wheel would be at a disadvantage on a real big bump.
also small wheels would be a bitch for going down steep hills: