Upsizing Rear Tire to 190/55 (w/ pics)

[Auron]

tire and wheel specs for Duck here- https://en.wikipedia.org/wiki/Ducati_999

yeah, not a 55 aspect ratio, but that is precisely what makes it work on a Feej...

unused rubber?....I haven't seen many sport tourers without some chicken strips...

No, that's precisely why you don't know what you're talking about. The 55 and 50 tire are completely different. Keep looking guys, OEM 55 on a 5.5. Pack a lunch

Here's a good article for those of you insisting on something other than opinion.

https://www.sportrider.com/does-size-matter

 

[CA G-Man]

tire and wheel specs for Duck here- https://en. wikipedia.org/wiki/Ducati_999

yeah, not a 55 aspect ratio, but that is precisely what makes it work on a Feej...

unused rubber?....I haven't seen many sport tourers without some chicken strips...

No, that's precisely why you don't know what you're talking about. The 55 and 50 tire are completely different. Keep looking guys, OEM 55 on a 5.5. Pack a lunch

Here's a good article for those of you insisting on something other than opinion.

https://www.sportrider.com/does-size-matter

Um... Auron: Did you miss Top_Speed1's post (#337)? Look up - waaaaay up... (okay only 4 posts up).

As for your link I think the author screwed up the diagram. What they’re showing as a 180/50 (the green line) looks a lot more “pinched” than what they’re showing as a 190/50 (the blue line) which clearly shouldn't be the case. I'm also dubious of any moto writer who would purport to dispel “the popular myth that the wider tire puts down a bigger footprint and gives more traction” by saying “we felt no improvement in that department from the properly sized tire.” I’ve heard of a “seat of the pants accelerometer” before but a “2-cheek contact patch caliper” seems to be pushing it!

 

[Top_Speed1]

Okay, all u guys with aftermarket seats, foot pegs and even those F6 mirrors that you -think- u have made an improvement on your bike with....... Change it back! Now! .....It's not within Yamaha specs nor the technical design platform.

So who's first to lose the mirrors, or whatever u did that was not OEM ......

Waiting Amigos...........

No serious, this needs to be lightened up some. Ride w what u wish, all Farkles or changes included.

 

[palerider]

tire and wheel specs for Duck here- https://en. wikipedia.org/wiki/Ducati_999

yeah, not a 55 aspect ratio, but that is precisely what makes it work on a Feej...

unused rubber?....I haven't seen many sport tourers without some chicken strips...

No, that's precisely why you don't know what you're talking about. The 55 and 50 tire are completely different. Keep looking guys, OEM 55 on a 5.5. Pack a lunch

Here's a good article for those of you insisting on something other than opinion.

https://www.sportrider.com/does-size-matter

Um... Auron: Did you miss Top_Speed1's post (#337)? Look up - waaaaay up... (okay only 4 posts up).

As for your link I think the author screwed up the diagram. What they’re showing as a 180/50 (the green line) looks a lot more “pinched” than what they’re showing as a 190/50 (the blue line) which clearly shouldn't be the case. I'm also dubious of any moto writer who would purport to dispel “the popular myth that the wider tire puts down a bigger footprint and gives more traction” by saying “we felt no improvement in that department from the properly sized tire.” I’ve heard of a “seat of the pants accelerometer” before but a “2-cheek contact patch caliper” seems to be pushing it!

Auron,

You're just supporting your opintion with someone else's opinion. That just proves you aren't thinking for yourself. All that this blurb--grandiose to call it an article--says is that you should think twice before you do it. That's good advice for anything you do to a motorcycle, but it's not a reason not to do it. We've got a lot of long-time riders here whose experience with this swap tells them that it works, and we've got you yelling from the perimeter that the sky is falling. Thanks for the warning, and feel free not to make this swap for yourself.

 

[HotRodZilla]

Auron,

That article you posted isn't even related to what we're talking about here. We're doing the opposite of 'lowering the tire profile' and using 190/55s, NOT 190/50s. Your belief in some other guy's opinion is duly noted. I would also note that you probably shouldn't run around telling people they don't know what they're talking about when your comprehension of the subject is obviously lacking.

 

[Auron]

Oh my god so much fail, you don't even know how wide your rims are. The K1600 has a 6.0 rim. Have fun guys.

 

[HotRodZilla]

Have fun guys.

Well, that's what we were trying to do until you came along and got all uppity about it.

 

[bigjohnsd]

Interestingly enough, I was looking at the Dunlop Race Tire fitment guide and they show 5.5"-6" as appropriate rim widths for 190/55-17 Race Tires.

Not sure how they differ in profile from street tires.

FYI, now I'll sit back and watch the cats quarrel!

 

[Top_Speed1]

For one...

I don't "darkside" (put a car tire on the rear). Not that I do or don't believe in it....

I just don't go there, and, I don't go over and shit on "their" thread either!. To each his own.

I believe everyone has the right to follow their own beliefs and express them, but enough already. The bottom line is simple... the peeps who have tried this "fat-siding" really like the outcome. I've had guys come up to me personally at Rally's and shake my hand and say "hey thanks man, I tried a fat-sider mainly because of your thread, and I really, really like the characteristics of it compared to my stock 180/55 tire.

Since you have not tried it, and, you are going only by BS and grasping at paper straws (at that!), I would suggest you gracefully bow down... and if your so macho?... yes, you can even say "you won" if it makes you feel better.

To all the others fat-siders out there?... carry on!

 

[Top_Speed1]

Oh my god so much fail, you don't even know how wide your rims are. The K1600 has a 6.0 rim. Have fun guys.

Okay, this makes less of a difference than 1lb of air pressure. The tire formation changes so very little w this. So let's start up an argument that 41lbs is terrible compared to 40lbs.

For one...

I don't "darkside" (put a car tire on the rear). Not that I do or don't believe in it....

I just don't go there, and, I don't go over and shit on "their" thread either!.

I believe everyone has the right to follow their own beliefs and express them, but enough already. The bottom line is simple... the peeps who have tried this "fat-siding" really like the outcome. I've had guys come up to me personally at Rally's and shake my hand and say "hey thanks man, I tried a fat-sider mainly because of your thread, and I really, really like the characteristics of it compared to my stock 180/55 tire.

The ONLY semi-negative coming from peeps using this on the FJR was... "My chicken strips are wider now, but it handles better, dives into turns easier and quicker, so who cares!"

Since you have not tried it, and, you are going only by BS and grasping at paper straws (at that!), I would suggest you gracefully bow down... and if your so macho?... yes, you can even say "you won" if it makes you feel better.

To all the other fat-siders out there?... carry on!

 

[rushes]

FYI, now I'll sit back and watch the cats quarrel!

 

[Wine Guy]

Just changed mine out to a 190/55 this past weekend on my 2013. Only have a couple of hours on it so far but it's seems great. No traction control or ABS issues or warnings. It's brought my speedo closer to reality as well. It was 10% optimistic before the tire change and now is down to 5%. No complaints from me at all.

10,000 kilometres since I "super-sized" my rear tire and I am thrilled with the way it performs! Way more predictable in the corners which has improved my riding confidence substantially. No tech stuff here, just a happy rider speaking from my personal experience. My 2 pennies.

 

[lnewlf]

forget the fat side...this is more about fat head

 

[Queensland Ken]

Recently done a 4.5K km ride with a 190*55 PR2.

Much better tip into corners and improved speedometer error.

Even easier to to get the Gen3 onto the center stand, real easy, a big plus with my post op gut operations.

 

[Spud]

Recently done a 4.5K km ride with a 190*55 PR2.Much better tip into corners and improved speedometer error.

Even easier to to get the Gen3 onto the center stand, real easy, a big plus with my post op gut operations.

Ken; please tell me they mounted it counterclockwise for riding in the southern hemisphere. Otherwise it's just another level of insanity you've added.

 

[Queensland Ken]

I doubt the Coriolis effect has anything to do with tyres.

If you can't contribute to the post don't bother posting, keep your smart ass comments to yourself !!!

 

[HotRodZilla]

I doubt the Coriolis effect has anything to do with tyres.
If you can't contribute to the post don't bother posting, keep your smart ass comments to yourself !!!

DAMMIT!!! I'm outta likes! That was the best post of the week!

 

[BanjoBoy]

There is only one significant down-side to the Upsize: Cost of the skins.

For those that have super-sized their tire on a 3rd Gen with the improved center stand, the bike must virtually lift itself...

Actually there's another; ('least fer me anyways.) is that it gears the bike up. That's prolly a benefit fer slabbers, but I spend a lot of time chasing sportbiles, and the taller gearing gives me less drive outta the corners on mah weak sauce genII. Now if'n I had a gen I or III?

I'm back to a 180/55 w/ Soupy's raising links. I like the feel and turn in of the 190/55 bettah, but need the extra drive outta the 2nd gear corners.

An added benefit of the 190/55; since the tire is "pinched" it is pointyer, and in being pointy you actually have a larger contact patch while banked over.

 

[CA G-Man]

An added benefit of the 190/55; since the tire is "pinched" it is pointyer, and in being pointy you actually have a larger contact patch while banked over.

That was my "hunch" too but I was too timid to go there...

 

[Fred W]

From what I recall, the contact patch size (total area) is not affected much, if at all, by the profile of the tire.

The shape of the patch will certainly vary, but the size of the patch is entirely dependent on the amount that the rounded tire deflects, which is more related to the weight of the machine and the pressure in the tire. When a lower profile allows a wider patch, the weight being supported by a wider area of tire will deflect the tire less producing a shorter patch. And vice versa.

Now the shape of the tire might bias the various performance characteristics of the tire differently; for instance, the lateral adhesion (for cornering) vs. longitudinal traction for acceleration and braking. Just something else to consider.