Tire size comparison, (split from the dano thread)

HDTony · Oct 15, 2002

Its true Ken.

180 is much better for Drag racing. !90 or even 200 is better for curves. Thats why I was soooo Surprised to see you going with a 180. With that 180 you have probably lost about 3 or 4 mph in the top speed and decreased your lean angle a hair.

Meulen · Oct 15, 2002

GsxrTony said:
Its true Ken. 180 is much better for Drag racing. !90 or even 200 is better for curves. Thats why I was soooo Surprised to see you going with a 180. With that 180 you have probably lost about 3 or 4 mph in the top speed and decreased your lean angle a hair.

No:nono :nono Read my previous post. There is something about the profile of the 180 that helps the turn in. It doesn't make sense but try it and you will see.

HDTony · Oct 15, 2002

Crazy said:
No:nono :nono Read my previous post. There is something about the profile of the 180 that helps the turn in. It doesn't make sense but try it and you will see.

I think you were doin to much :- :- :- :- :- LOL

Yup the 180 will give you more of a contact patch and may lean quicker becasue it will be flatter across the center, but maximum lean will be limited due to the fact that the profile of the tire will cross sections curvature will not be as round.

HDTony · Oct 15, 2002

Ok heres a scientific document i made to expalin what I'm talking about. Imagine its the tire as looked at from the rear of the bike. 3 different sizes sqeezed on the same size rim. Granted my PC drawing skills sucks major ass. But what you can see is that the more rubber you try and squeeze in there the rounder it will end up being.

Meulen · Oct 15, 2002

GsxrTony said:
Ok heres a scientific document i made to expalin what I'm talking about. Imagine its the tire as looked at from the rear of the bike. 3 different sizes sqeezed on the same size rim. Granted my PC drawing skills sucks major ass. But what you can see is that the more rubber you try and squeeze in there the rounder it will end up being.

Smart allic:laughing :laughing :rofl :rofl

Meulen · Oct 15, 2002

GsxrTony said:
I think you were doin to much :- :- :- :- :- LOL

Yup the 180 will give you more of a contact patch and may lean quicker becasue it will be flatter across the center, but maximum lean will be limited due to the fact that the profile of the tire will cross sections curvature will not be as round.

That's besides the point

:laughing :laughing . I'll read the article later, but I said this before. Normally it is true when you go to a smaller size tire and stretch it over the rim you get a bigger contact patch. I'm telling you what I observerved in my recent tire change the contour of the 180 is just more extreme. It's way rounder. Is that going to vary between brands of tires..most likely, but for the bt010's I've noticed a rounder profile with the 180 giving me more sidewall and less center patch. I also consulted the YZF board before I made this change confirming my consultation with Ken and Ricerocket on this issue. I went to the 180 and saw a huge diff. What your saying is the flat spot helps you turn in, that's just not right. Anybody who's had a worn center to their tire will tell you it takes an extra effort to lean it over.

HDTony · Oct 15, 2002

Ok I'm not disagreeing with you on the fact that a 180 will give a bigger contact patch. But theres no way a 180 will have a rounder cross section than a 190. The 180 will have shorter sidewalls, and being stretched horizontally to fit it on the rim will cause it to flatten out more giving it the larger contact patch. Not to mention since the overall diametter is smaller it is actually lowering the rear end of your bike which will cause turn in to slow down. Going to a 200 would raise the rear end of the bike and speed up turn in.

Meulen · Oct 15, 2002

GsxrTony said:
Ok I'm not disagreeing with you on the fact that a 180 will give a bigger contact patch. But theres no way a 180 will have a rounder cross section than a 190. The 180 will have shorter sidewalls, and being stretched horizontally to fit it on the rim will cause it to flatten out more giving it the larger contact patch. Not to mention since the overall diametter is smaller it is actually lowering the rear end of your bike which will cause turn in to slow down. Going to a 200 would raise the rear end of the bike and speed up turn in.

I thought the same thing for as long as I've been riding until somebody proved me wrong. Thus I bought a set of 180's last set. No more arguing for me when the right guys see this they'll chime in

HDTony · Oct 15, 2002

How did they prove you wrong?

I'm just wondering, cause this is the shit I learned when Goodyear sent me to school at the akron headquarters. I cant see that the basic principles of tire fitment have changed that much in the last 10 years.

Meulen · Oct 15, 2002

GsxrTony said:
How did they prove you wrong?

I'm just wondering, cause this is the shit I learned when Goodyear sent me to school at the akron headquarters. I cant see that the basic principles of tire fitment have changed that much in the last 10 years.

:mad :mad :mad J/K LOL,
I'm not saying it makes sense. I mentioned this previously. It seems like if you go to a 170 or 160 on our rims what you said is true. I think manufactures may contour the 180 as a road racing tire cause if you look at it it has a more extreme contour. It's just the way they are made. Now with a Dunlop d207 the story may be different cause it has a flat profile to begin with but I'm noticing most manufactures make the 180 to turn. Here ya go

:laughing :laughing

Meulen · Oct 15, 2002

Looking at a set it seems that they may tuck the sidewalls in on the 190's so the tread spreads wider whereas the 180's sidewalls and tread start almost perpindicular to the lip of the rime and then the tread starts at a more extreme angle.

Odysseys · Oct 15, 2002

i know this for sure......a 180 tire cause of it HIGHER profile ^ will flick over faster and give you more agilness in doing so.

Meulen · Oct 15, 2002

Odysseys said:
i know this for sure......a 180 tire cause of it HIGHER profile ^ will flick over faster and give you more agilness in doing so.

Yes, now go over to Tony's and smack him for riling me up over this.:laughing :laughing :rofl :rofl

Odysseys · Oct 15, 2002

from what i read somewhere?:laughing between you guys..crazy you were saying ROUNDER...a 180 isnt round in its profile...its higher..like a PEAK of a hill...a 190 is more flater,rounder, etc...i still havent had a chance to see his download..lol

Odysseys · Oct 15, 2002

ahh sorry tony i think you are wrong in your diagram.

if you were to take NORMAL car tires and do that ...yeah it will look like that...but motorcycle tires SIDE WALL designs change from tire size to tire size...like a 180,190,200 from what i have SEEN a 180 has a shorter less angled out side wall to mate with the tire body that we ride on...a 190 has a more outward angle making the tire sit more flatter giving the center or the over all tire a WIDER platform...and so on with a 200 size tire.

its kinda like this

180 side wall profile (example) I I
to a 200 side wall profile \ /

if anything ill clear this up by calling the racing team usuers of metzler company..i THINK i still got there # around here..if we cant come to terms on this..lol

Meulen · Oct 15, 2002

Odysseys said:
from what i read somewhere?:laughing between you guys..crazy you were saying ROUNDER...a 180 isnt round in its profile...its higher..like a PEAK of a hill...a 190 is more flater,rounder, etc...i still havent had a chance to see his download..lol

Didn't mean to say rounder. I ment more extreme profile. or higher peak as you said.

HDTony · Oct 15, 2002

Odysseys said:
but motorcycle tires SIDE WALL designs change from tire size to tire size...like a 180,190,200 from what i have SEEN a 180 has a shorter less angled out side wall to mate with the tire body that we ride on...a 190 has a more outward angle making the tire sit more flatter giving the center or the over all tire a WIDER platform...and so on with a 200 size tire.

its kinda like this

180 side wall profile (example) I I
to a 200 side wall profile \ /

Well Yeah, thats what I've been trying to say. The sidewalls are going to be different. Since they are sized as a percentge of the measured cross section of the tire (width) The bigger the cross section the bigger the sidewall. Squeezing a bigger tire on the same size rim will do exactly what you are talking about and make the sidwall be positioned at a different angle, like you said above. Now my point is that change of shape in the sidewalls is also going to affect the cross section diameter and shape as well.

LOL, I think we need to get the designers from Bridgestone, metzler and dunlop to get thier asses in here and make some sence of this.

Meulen · Oct 15, 2002

GsxrTony said:
Well Yeah, thats what I've been trying to say. The sidewalls are going to be different. Since they are sized as a percentge of the measured cross section of the tire (width) The bigger the cross section the bigger the sidewall. Squeezing a bigger tire on the same size rim will do exactly what you are talking about and make the sidwall be positioned at a different angle, like you said above. Now my point is that change of shape in the sidewalls is also going to affect the cross section diameter and shape as well.

LOL, I think we need to get the designers from Bridgestone, metzler and dunlop to get thier asses in here and make some sence of this.

Or we could just arm wrestle again:laughing :laughing :laughing

HDTony · Oct 15, 2002

Screw that,Ithink I pulled something last time

Meulen · Oct 15, 2002

GsxrTony said:
Screw that,Ithink I pulled something last time

yeah yeah yeah. You and Pete both.:rolleyes :rolleyes

Why don't we do this. Let's find people with the same size rims and the tires and sizes in question, preferable new, and get them out somewhere we can see the differences.:cheers

Tire size comparison, (split from the dano thread)

HDTony

Meulen

HDTony

HDTony

Meulen

Meulen

HDTony

Meulen

HDTony

Meulen

Meulen

Odysseys

Meulen

Odysseys

Odysseys

Meulen

HDTony

Meulen

HDTony

Meulen

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