180 rear - R1

[miSTa]

Interesting of all this talk of the 50 vs 55 for the 190, hadn't really considered the difference that much before.

This image says it all (borrowed from http://www.sportrider.com/tech/tires...ire/index.html)

Shame I've just bought a 190/50, maybe next time.

[roogazza]

thanks for all imput. i think the overall verdict is go with the 190/55 which is what i wanted to hear! why would the use a 180 if a 190 is wat was designed for the bike!!! duhhhh

No one has mentioned it but is a 180 not standard issue for those older R1s ??? Check a manual. ( Just asking I don't know )

[onearmedbandit]

No one has mentioned it but is a 180 not standard issue for those older R1s ??? Check a manual. ( Just asking I don't know )

Nah, they were a 190, same as the Gixxer.

http://www.bikez.com/motorcycles/yamaha_yzf_r1_2002.php

[Grubber]

I've previously run PR2 190/50 on mine. I changed to the 190/55 yesterday. Shit what a difference. Nearly have to lift it back up from the corners. It just falls over when you head into a corner. Marvelous.

[NZsarge]

I've previously run PR2 190/50 on mine. I changed to the 190/55 yesterday. Shit what a difference. Nearly have to lift it back up from the corners. It just falls over when you head into a corner. Marvelous.

Amen brother, I won't be going back to a 50 series if I can help it. Didn't make that much difference to the overall gearing either really according to my GPS, actually my speedo is now slightly more accurate..

[roogazza]

Nah, they were a 190, same as the Gixxer.

http://www.bikez.com/motorcycles/yamaha_yzf_r1_2002.php

Cheers bud, my 06 runs a 50 profile standard.
I'd benefit going to a 55 ? Must say I preferred my bandit with a 180.55, when I tried a 190.55 it seemed to over tyre it. Maybe just my preference.

[White trash]

Cheers bud, my 06 runs a 50 profile standard.
I'd benefit going to a 55 ? Must say I preferred my bandit with a 180.55, when I tried a 190.55 it seemed to over tyre it. Maybe just my preference.

Pretty sure the GSXR rear rim will be wider than the Bandit rear Gaz so you probably wont get that same "over curled" feeling.

If you wanna go stupid, get your hands on some 195/65 N-Tech rear with a 125/80 front. That makes em steer pretty fuggin quick

[NZsarge]

Cheers bud, my 06 runs a 50 profile standard.
I'd benefit going to a 55 ?

Based upon my experiences yes.


Must say I preferred my bandit with a 180.55, when I tried a 190.55 it seemed to over tyre it. Maybe just my preference.

Going from a 180/55 to a 190/55 would slow the handling down I would have thought, probably not beneficial on a Bandit.
The benefits are coming from 190/50 to a 55 profile, the bike will turn more fluidly/easily and should feel more planted once leant over in a corner.

[Owl]

I got me a 200 on the back and its awesome, cant get it to the edge tho.

Poser

[R1GEEZA]

went in to the dealer (yes bike dealer!) today and told him of the situation. luckily some 190/55 arriving tomora so they gonna swap it ova. apparently he spotted the mistake before i picked it up but because they had no 190s he left it!!!! not quite sure why he admitted that to me??? although i cant go for a ride now overall im happy with the outcome

[R1GEEZA]

Going from a 180/55 to a 190/55 would slow the handling down I would have thought, probably not beneficial on a Bandit.
The benefits are coming from 190/50 to a 55 profile, the bike will turn more fluidly/easily and should feel more planted once leant over in a corner.

something i only resently leared was the second number on the tire ie. 50 or 55 is a percentage of the first. so surely there isnt much difference in turn in speed goin from 180/55 to a 190/55 (55 percent of 180=99 vs 55percent 190=104.5) you just get the benifit of having more tire???? this is totaly just in my head and i could be, and probably am getting the wrong end of the stick??????

[NZsarge]

something i only resently leared was the second number on the tire ie. 50 or 55 is a percentage of the first. so surely there isnt much difference in turn in speed goin from 180/55 to a 190/55 (55 percent of 180=99 vs 55percent 190=104.5) you just get the benifit of having more tire???? this is totaly just in my head and i could be, and probably am getting the wrong end of the stick??????

From the the (admittedly minimal) understanding that I have of it is the if your bike has a standard fitment 190/50 (like mine) and you go to a 190/55 (like I just have) you'll get a very slight sharpening in the geometry in the front end of the bike because the higher 55 profile has raised the rear of the bike ever so minimally but the biggest noticeable change comes from the fact that the the shape of a 50 profile is different to that of the 55 profile tyre.
The 55 is rounder and higher and rolls from side to side much more fluently than the 50 profile, the trade off for this is a slight reduction in straight line stability.
Going from a standard fitment of a 180/55 to a 190/55 (which i'll admit I have never done) would slower the turn in of a bike down making it feel lazier or slower to bank over into corners and slower to flick through from left to right (or visa versa) corners. Yes it would though have a greater contact patch once banked over into a corner, the only thing I would be weary of (particularly going from 180/55 to 190/50 or 190/55) is I guess it could introduce some kind instability into the handling somewhere.
You must understand these are only my thoughts and theories on the subject through a little of my own trials, there will undoubtedly be others out there that know much much more about it than that can back it up with known fact so take what I have said with a dose of salts, it's only what I have experienced that i'm relating to and relaying here.

Check out Mista's post at the top of this page.

[roogazza]

From the the (admittedly minimal) understanding that I have of it is the if your bike has a standard fitment 190/50 (like mine) and you go to a 190/55 (like I just have) you'll get a very slight sharpening in the geometry in the front end of the bike because the higher 55 profile has raised the rear of the bike ever so minimally but the biggest noticeable change comes from the fact that the the shape of a 50 profile is different to that of the 55 profile tyre.
The 55 is rounder and higher and rolls from side to side much more fluently than the 50 profile, the trade off for this is a slight reduction in straight line stability.
Going from a standard fitment of a 180/55 to a 190/55 (which i'll admit I have never done) would slower the turn in of a bike down making it feel lazier or slower to bank over into corners and slower to flick through from left to right (or visa versa) corners. Yes it would though have a greater contact patch once banked over into a corner, the only thing I would be weary of (particularly going from 180/55 to 190/50 or 190/55) is I guess it could introduce some kind instability into the handling somewhere.
You must understand these are only my thoughts and theories on the subject through a little of my own trials, there will undoubtedly be others out there that know much much more about it than that can back it up with known fact so take what I have said with a dose of salts, it's only what I have experienced that i'm relating to and relaying here.

Check out Mista's post at the top of this page.

Yes Sarge, instability was increased but mainly cos I had also raised the rear 25mm by fitting a gsxr1100 shock. This was a great mod for me, but the addition of the big rear 190.55 altered things just a bit too much. Inducing some fearful wobbles.

[NZsarge]

Yes Sarge, instability was increased but mainly cos I had also raised the rear 25mm by fitting a gsxr1100 shock. This was a great mod for me, but the addition of the big rear 190.55 altered things just a bit too much. Inducing some fearful wobbles.

Holy crap, 25mm is getting pretty radical!

[R1GEEZA]

From the the (admittedly minimal) understanding that I have of it is the if your bike has a standard fitment 190/50 (like mine) and you go to a 190/55 (like I just have) you'll get a very slight sharpening in the geometry in the front end of the bike because the higher 55 profile has raised the rear of the bike ever so minimally but the biggest noticeable change comes from the fact that the the shape of a 50 profile is different to that of the 55 profile tyre.
The 55 is rounder and higher and rolls from side to side much more fluently than the 50 profile, the trade off for this is a slight reduction in straight line stability.
Going from a standard fitment of a 180/55 to a 190/55 (which i'll admit I have never done) would slower the turn in of a bike down making it feel lazier or slower to bank over into corners and slower to flick through from left to right (or visa versa) corners. Yes it would though have a greater contact patch once banked over into a corner, the only thing I would be weary of (particularly going from 180/55 to 190/50 or 190/55) is I guess it could introduce some kind instability into the handling somewhere.
You must understand these are only my thoughts and theories on the subject through a little of my own trials, there will undoubtedly be others out there that know much much more about it than that can back it up with known fact so take what I have said with a dose of salts, it's only what I have experienced that i'm relating to and relaying here.

Check out Mista's post at the top of this page.