Motor Overhaul (summer project)

[blaine]

No problems.With the 140 tire,it changes the gearing about half between the 15t and 16t as it is wider & not as tall.
:cool:

[RamAir]

Hmmm that would be a nice comprimize!

Why is it not as tall? Whats the overall tire size? I mean all the numbering?

[blaine]

Originally Posted by RamAir

Hmmm that would be a nice comprimize!

Why is it not as tall? Whats the overall tire size? I mean all the numbering?

Same size as original tire.The wider the tire the lower the profile.140/90-15.
:cool:

[Water Warrior 2]

The 140/90-15 is 4.96 inches in height.
The 130/90-15 is 4.606 inches in height.
The 140 will give you slightly taller overall gearing.

[blaine]

Originally Posted by Water Warrior

The 140/90-15 is 4.96 inches in height.
The 130/90-15 is 4.606 inches in height.
The 140 will give you slightly taller overall gearing.

Thanks.I didn't know the difference in height.But I could feel the difference with it on the bike.
:cool: :2tup:

[Water Warrior 2]

Originally Posted by blaine

Thanks.I didn't know the difference in height.But I could feel the difference with it on the bike.
:cool: :2tup:

The width is 130 mm. 90% of that figure is the height
The width is 140 mm. 90% of that figure is the height. This will raise the bike a whopping .354 inches. Total height of the tire will be 0.354 x 2 = 0.708 inches. Oh boy, maybe I should figure the difference in the amount of rotations in a mile now. Then I could figure out the actual difference in gearing based on those figures...................or I could just go for a walk.

[mrlmd1]

"This will raise the bike a whopping .354 inches."
And that's at rest, unmounted, not weighted down on the bike by the weight of the rider, fuel, frame, etc, compared to the other tire. So the effect is probably not even measurable or noticeable by a rider. If the tire diameters were actually measured on a fully loaded bike, my bet would be that they are even closer in measurement than what WW posted,
I think the difference is in your head. :poke2: :neener:

[blaine]

Originally Posted by mrlmd1

"This will raise the bike a whopping .354 inches."
And that's at rest, unmounted, not weighted down on the bike by the weight of the rider, fuel, frame, etc, compared to the other tire. So the effect is probably not even measurable or noticeable by a rider. If the tire diameters were actually measured on a fully loaded bike, my bet would be that they are even closer in measurement than what WW posted,
I think the difference is in your head. :poke2: :neener:

The only time I noticed any difference was on the hills,it might also be the weight difference of the tire.I also had the 16t sprocket .Like you said,the difference might have been in my head.
:2tup: O_o

[RamAir]

Ya when you said "cut the gearing in half" I thought you got a 140/45-15 tire or something!!

WOW 16T na d a 140/90 I wonder what your rpm is on highway speeds! Must be nice and quiet! Man you must get great MPG Also with all that combined! Niceeeeeeeeeeee.

[Water Warrior 2]

Originally Posted by RamAir

Ya when you said "cut the gearing in half" I thought you got a 140/45-15 tire or something!!

WOW 16T na d a 140/90 I wonder what your rpm is on highway speeds! Must be nice and quiet! Man you must get great MPG Also with all that combined! Niceeeeeeeeeeee.

If I remember correctly a 16 tooth front sprocket cuts the RPM by 400 or so. And a 140/45-15 rear tire would be a really really really low profile tire. The overall diameter of the tire would be less so the RPM would increase.