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post #61 of 156 (permalink) Old 07-21-2009, 01:14 PM
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Originally Posted by rhoag View Post
I will take a few measurements before I throw the new tire on. I would hate to mess up my suspension when I paid to have it set-up last time I was at black hawk.
Honestly, if you changed tire type or size since the last suspension setting, you already have a reason to at least have it checked.


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post #62 of 156 (permalink) Old 07-21-2009, 11:27 PM
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I put a 190/55 pp 2ct next to a 190/55 bt-16 and noticed the crown to be almost the same while at local dealership. So far best price I can find for 190/55 is with qualifier. maybe I will slap on 190/50 then next year go with the 190/55 assuming prices will be cheaper.
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post #63 of 156 (permalink) Old 07-22-2009, 07:42 PM
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Well, I put the power one 2 CT's (55 rear) on tonight and went for a ride. The bike turns in way easier. My R1 is an 06 and it appears to have plenty of room between the swing arm and the tire. I just wonder how much the tire expands at 170 indicated or so on the front staight at Road America???
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post #64 of 156 (permalink) Old 07-22-2009, 07:54 PM
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Originally Posted by rhoag View Post
Well, I put the power one 2 CT's (55 rear) on tonight and went for a ride. The bike turns in way easier. My R1 is an 06 and it appears to have plenty of room between the swing arm and the tire. I just wonder how much the tire expands at 170 indicated or so on the front staight at Road America???
You should not have a problem on a 2006 model. The swingarm is longer. It should accommodate 190/55 with no problems. Tire expansion should not be a problem.


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post #65 of 156 (permalink) Old 08-22-2009, 12:12 PM
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O7 R1

I have a 190/50 17 on the back, this will be the first time I put a tire on the back, can u go wider or is that it, and my wife rides with me 50 percent of the time and she isnt big at all, just wandering if u can or not, Thanks


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post #66 of 156 (permalink) Old 08-23-2009, 09:21 PM
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post #67 of 156 (permalink) Old 08-31-2009, 04:15 AM
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I run a 190/55 size tire on my 2005 R1 - works great, no problems. I have Diablo Corsa III (dual compound in rear) tires on the bike. Switching from the stock 190/50 to the 190/55 size is one of the single best mods I have ever made on my bike (perhaps 2nd only to changing the front sprocket to 16 teeth in the front).

After changing the tire, the turn in on the bike went from "okay" to fantastic. The 190/55 has more of a round profile, whereas the 190/55 tends to be a bit more like a drag tire (a bit more flat in the middle). The result is that - with the 190/55 - the bike leans over and turns in far more smoothly than before. When I first took the bike out after getting the new tires on, it was shocking what a change it made - it was almost like a whole new motorcycle.

Aside from the change in handling, the bike does sit a touch higher in the rear - but not overly so. You'll notice there is a hair more lean when you put the kick stand down. The tire is a little larger and as a result it lends a little more confidence when cornering the bike. Probably also gives a touch more clearance on the rear pegs, but don't quote me on that (I run my Sato rear sets up pretty high as is :-)

Anyway, I can't say enough good things about the 190/55 size tire on the R1 - if you have any question about whether you should run the 190/50 or 190/55, go with the 190/55 hands down. It makes the bike a joy to ride and there is really no downside. If you are worried about the height change on the bike (as far as touching the ground, etc.) don't. It's not enough of a change to notice or worry about. What the 190/55 brings in the way of benefits far out weigh any concerns one can think of due to the larger size.

In a word, it's a great mod to the bike if your R1 came from the factory with a 190/50 size OEM tire.

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post #68 of 156 (permalink) Old 09-02-2009, 08:45 PM
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So i could put a 190/55 on the back of my 07 R1 with no problem ?
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post #69 of 156 (permalink) Old 09-02-2009, 09:34 PM
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Originally Posted by R1thrill View Post
So i could put a 190/55 on the back of my 07 R1 with no problem ?
You should be able to. You can on the 04-06 R1 no problem. The 09 comes stock with that size tire. I don't have any direct experience with the 07 model year, but I would imagine it's basically the same as the rest of the bikes. The 190/55 should work okay just like on the 05 year that I own. The 55 isn't that much different than the 50, just a bit taller and a slightly different profile.

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post #70 of 156 (permalink) Old 09-05-2009, 09:33 AM
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Originally Posted by RayJohns View Post
You should be able to. You can on the 04-06 R1 no problem. The 09 comes stock with that size tire. I don't have any direct experience with the 07 model year, but I would imagine it's basically the same as the rest of the bikes. The 190/55 should work okay just like on the 05 year that I own. The 55 isn't that much different than the 50, just a bit taller and a slightly different profile.

Ray


I only run 190/55's on my bike. The difference is this: 190 refers to the width of the tread. 55 is the sidewall ratio ( Sidewall height is 55% of the tread width ) which would make the sidewall and therefore the tire taller than a tire with a 50% aspect ratio ( 190/50r17 ) which would only have a sidewall that was 5% shorter yeilding less ability to flex and apply the treadto the ground.


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post #71 of 156 (permalink) Old 09-05-2009, 02:39 PM
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I only run 190/55's on my bike. The difference is this: 190 refers to the width of the tread. 55 is the sidewall ratio ( Sidewall height is 55% of the tread width ) which would make the sidewall and therefore the tire taller than a tire with a 50% aspect ratio ( 190/50r17 ) which would only have a sidewall that was 5% shorter yeilding less ability to flex and apply the treadto the ground.
All excellent points. I also will only run 190/55 size tires on my bike. Another point for people to keep in mind is that the 190/50 OEM size tire tends to be a bit more like a drag bike tire - in other words, it tends to have a little more of a flat profile compared to the 190/55 which is more round.

What struck me most between the two tire profiles is that with the 190/50 size, there is more of a noticeable transition when you corner - you can feel the bike roll off the flat part of the tire and onto the side of the tire. On my bike, this caused sort of a "folding" over feeling in the turn-in. I'm not sure of the technical term for this, but it just feels like too much turn-in from the bike when you corner (especially a slow corner, such as a 90 degree turn). Anyway, with the 190/55, because the profile of the tire is more round, you don't have as much of this transition occurring. The result is smoother cornering and more confidence in general on the bike.

The 190/55 is also a slightly taller/larger tire, so you have a larger contact patch on the ground. I personally run the Diablo Corsa III tire, which is a dual compound in the rear.

Anyway, one of the best modifications I have made to the bike. At first I wasn't sure about changing the size, but now I would never go back.

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post #72 of 156 (permalink) Old 06-16-2010, 08:54 AM
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anyone running a 55 on a 2002-2003 R1?

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post #73 of 156 (permalink) Old 06-16-2010, 10:59 AM
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Have on my 02 for a while. Better turn in on the 55's due to ride height IMO. The 50's feel more planted. I prefer the 55's on my 02...
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post #74 of 156 (permalink) Old 06-28-2010, 12:51 PM
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I have an '01 R1. Just ran through a set of 2CT's with the rear being 190/ 55. Absolutely no problem with fit/ clearance issues. In fact I didn't realize the stock size is 190/50 until it came time to change out the rubber (Q2's this time, they are awesome).
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post #75 of 156 (permalink) Old 07-22-2010, 06:13 AM
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Great thread. Thanks for all of the info. On my 600 track bike I had some really pointy 180 slicks mounted. They literally fell into the corners. Scared the crap out of at first but then I started loving it. When I would get back on my street bike it would feel like the bike wouldn't turn at all. So I ordered a PP 2CT 190/55. Should be in soon. I'm looking forward to the handling changes.
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post #76 of 156 (permalink) Old 07-22-2010, 11:50 AM
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Great thread. Thanks for all of the info. On my 600 track bike I had some really pointy 180 slicks mounted. They literally fell into the corners. Scared the crap out of at first but then I started loving it. When I would get back on my street bike it would feel like the bike wouldn't turn at all. So I ordered a PP 2CT 190/55. Should be in soon. I'm looking forward to the handling changes.
You'll love them; it's like night and day difference. On my 2005 R1, when I switched from the 190/50 to the 190/55 in back, it was like buying a new bike as far as the cornering goes :-)

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post #77 of 156 (permalink) Old 07-22-2010, 02:37 PM
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anyone running a 55 on a 2002-2003 R1?
old post but yeah. only way to fly

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So I ordered a PP 2CT 190/55. Should be in soon. I'm looking forward to the handling changes.
broken record, but try the Pures for your next set. another boost!!!

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post #78 of 156 (permalink) Old 07-23-2010, 10:06 AM
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I have an 08 and have just changed to Michelin power pures, I completely agree with the above. The pures are amazing and 55 is the only way to go, there sould be an official Yamaha announcement. I would never fit a 50 again.
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post #79 of 156 (permalink) Old 07-23-2010, 01:09 PM
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I would never fit a 50 again.
+1

That's about the size of it (no pun intended). Once you change from a 50 to a 55, there's no going back :-)

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post #80 of 156 (permalink) Old 08-10-2010, 11:36 AM
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Some things to consider (or remember):

1. actual tire widths vary among tire brands, I believe due to variances in measuring methods. For example, a 180 in Dunlop might actually be the same width as a 190 in Bridgestone because the 'stone might be a bit narrower when measured with Dunlop's method and the 'lop might be a bit wider when measured by Bridgestones' method. I haven't seen this first hand but have heard it from "tire guys."

2. the shapes of the tires affect the overall height and the turn in nearly as much (more?) than the labeled specs. I'd been running Bridgestone BT003RS 120/70 in front and decided to try out a BT003R 120/70; there are a few different choices in the 003R and the one I tried had a significantly steeper profile than the others. That meant lots of contact patch when leaned WAY over and much less when stood up; it also meant the bike really wanted to fall into the turns.

3. It's been touched, but the width of the wheel to which the tire is mounted also plays a big role in the profile of the tire.

4. Everyone should know there are a LOT of other things that affect turn-in, including wheel/tire weight and other rotating masses and suspension geometry.

5. Some folks who like how their bike feels on the street might find that "flickability" is dangerous in scenarios encountered on the track. It's possible I'd hate the 190/55 on the track and prefer the 190/50's stability.
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