180 or 190
 

From what it sounds like, most people seem to run 180 back tires right? On the 2000 R1, a 190 came stock, and that is what is on it now. Why the difference, does it change much, etc?

190 refers to the rear tire width in mm's. A 190 is slightly wider than a 180. I'd say keep the 190. A 180 will give you quicker handling at the expense of some traction, you need traction more than handling on that bike. At least for now.

The explanation of the rest of the code:

190/50/ZR17

190 is tire width,
50 is aspect ratio at max lean
ZR is speed rating
17 is rim size.

Yeah, i knew what it meant as far as size. Just wondering if one was better than the other or what.

I'd stick with what came stock, in this case the 190.

fair enough. After looking at my buell's 120/60s16, That thing is absolutely massive.

i'd go w/ 180, personally

For the Busa...

Tires Front: 120/70-ZR-17
Tires Rear: 190/50-ZR-17

I think mine might be the same ambly. I will check after I get out of a meeting.

Negative. You lose more of a contact patch which is needed on the liter bikes to handle the power delivery. In fact, a lot of 600 and 750 owners/racers will go up to the 190 for that reason. So they can get on the throttle quicker and harder. They just have to set their suspension up to compensate for the rear being raised more because it's a taller tire.

So stay with the 190, T. It's what is meant for that bike.

I was talking to some guys on r1-forum.com and they said some had tried a 180 but it didn't make a noticable difference in turning. They said go with a 190/55.

fahk, forgot he got the liter. 600's typically stock a 180/55/17 , I've heard anything bigger would hinder cornering at extreme angles but dont really buy into it. my man Dlit, as is most often the case, is correct.

Some of the liter riders at the gap go with 180 for a quicker turn in, that's about the only place I would even suggest running a 180 on a liter. Stick with the 190.

Be careful asking that on a forum... they might not know how to turn in the first place. I know, that sounds mean, but seriously.

To illustrate the difference between the 180 / 190
http://i17.photobucket.com/albums/b5...e5-01-zoom.jpg

Nice find, here's the same type of illustration from this article.

Here's a stock 180 tire on an f4i' rim, notice how round it is
http://images.sportrider.com/tech/ti...e-180-zoom.jpg

Now compare that with the flattened look of a 190 put on the same rim. It looks wrong because it is wrong
http://images.sportrider.com/tech/ti...e-190-zoom.jpg
http://images.sportrider.com/tech/ti...ofile-zoom.jpg
My suggestion? On a 2000 R1 a swingarm stretch and 400 series tire will seriously improve handling.
http://g.photos.cx/PhotoID20956-c3.jpg
http://g.photos.cx/PhotoID20955-58.jpg

azooom, i tried to find somewhere non VS, but that was all i could find. I am planning on going with a 190/55.

pizdets post was good info-but since hes got a r1 it would be the opposite. a f4i rim is 5.5 inches, r1 is 6inches.

actually it wouldn't be the opposite... it'd just not be as pronounced a diffrence..

wasnt clear on that-not opposite effect- piz showed a 180 to 190 on a 5.5 rim, o.p. asked about goin 190 to 180 on a 6inch rim. thats what i meant.

as far as actual effect i have no clue- i always thought if i put a 180 on a 6in rim, it would have more straightline contact patch, and if you squeezed a 190 on a 5.5in rim, you would have less straightline contact, and more contact when leaned over. pizdets pic seems to show the opposite

your right... a wider tire on a narrow rim will be more curved. (done this many times with my truck tires as it makes the beads harder to blow out on the trail when I run reduced pressure)

I just looked at the pics... yeah the 190 will be more curved the 180 will be flatter to fit in the same width rim

:dthumb:

I figured you did, I just wanted to illustrate why I thought a 190 would be better. Rather than just posting "Keep the 190"

actually because the 180 is going on a wider rim it will flatten it out and increase the contact patch for straight line... but reduce the profile and give it reduce handeling... or in theory it should... :idk:

What? A 180/55/17 is taller than a 190/50/17.

55% of 180 is 99mm. 50% of 190 is 95mm, so the 180 is a taller tire.

I agree with the contact patch statement though. I do however read on the Z1000 forums the best mos on that bike is to go down to a 180 due to the quicker turn in.

Interesting conversaton and comparisons and all BUT since a 190/50 came on my R1 and a 180/55 came on my R6 that's what will stay on them...I'll just trust Yamaha got it right. :idk:

Negative. Especially when you put a 190 on a 5.5" wide wheel. Trust me, the center of the tire is taller on a mounted 190 on a 5.5" wheel than a 180 on the same wheel.

Prove it genius.

Read my post again. The one you just replied to.

I'm talking about the 55 which is stock on a R1. I think Busa's are/were the only bikes that the 50 came stock on, I could be wrong though. I think 190/50s are rare these days. You'll find them on a lot of 600s though.

I still dont buy it. 180 sidewall height is 4mm taller. A 190 on a 5.5 rin versus a 6.0 rim wont change the height of the time by much at all. If anything they are probably closer to the same but the 190 won't be taller. Do the geometrical math. As a matter of fact my buddy here ar work has a 190 on his RC. I'll measure it today and compare to my bike and I'll let you know.

I believe my stock R1 has a 50...not a 55. My R6 has a 55 but in 180 of course.

The 600 wheel is more narrow. It will push the center of the tire up more because the sidewalls are closer to gether. Creates HUGE contact patches for the 600 and 750 riders.

Like I said, I could be wrong.

It is a 50 on your R1.

:cheers:

190/50 is standard on the R1.

Thank you, Mr. Yesterday.

Oh yeah it's standard on the GSXR1000, CBR1000RR and ZX10R as well douche.

Ouch. I was WAY wrong.

Nah its cool, the 190/55 seems like a race tire. And that obviously is taller than a 180 /55.

Stock on the 1125 is a 180-55-17. I'll just stick with that.
Not sure on what rubber to go with next though. Either Strada's or Road 2's.

That surprises me. I figured that it would be the 190 on the 1125.

I guess I got the 50 and 55 confused then.

nope... Buell is all about corners corners corners...
So i bought one in ND, where we have none! :lol:

There are a few of the bigger bikes that run 180's though.
Suzuki Bandit 1250
I think the RC
1125R

rc runs 190/50 stock, i went with a 180/55 and love the difference, so that gets my vote- swap for the 180 or even better a 190/55

and i can end this debate....

The RC51 (& most other current literbikes) come with equipped with a 190/50 tire. The first thing most owners do is throw it away & put on a 180/55 or 190/55 tire. The reason for this is the 180/55 tire is a taller tire than the 190/50 & aids in the overall handling of the bike making it turn-in easier. The 190/55 is an even better choice as it gives you an even taller diameter so you get all the benefits & then some of the 180/55 plus way more rubber on the ground when leaned over (when compared to the 180/55). The downside is that the 190/55 tires are more expensive sometimes WAY more expensive than their 180/55 siblings & the taller the tire is the more you will have to adjust your bikes suspension geometry to make it handle properly (i.e. hold a line without putting pressure on the bars, not want to stand up on the brakes & not run wide on corner exit etc...)

The man speaketh the truth...eth.

I swapped the stock 190 tire on my GSXR-1K for a 180 and never looked back. Turn in was awesome and since they were pilot powers, they stuck like glue no matter what I did with the throttle. Granted, I never made it to the track, but I'd rock the roads pretty hard and the 180 felt great.

seems like most of you guys that go frm 190 to 180 are also going from stock tires to pilots or equivalent. any1 go from 180 to 190, or 190 to 180, without changing brands/compounds for a true comparison?

I am going to Pilot Power 2ct or Corsa 3 when its that time. I am going to keep 190, but to to 55 instead of 50.