55 Wide Tires ? - Page 2 - Yamaha R1 Forum: YZF-R1 Forums

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post #21 of 156 (permalink) Old 10-09-2007, 09:47 PM
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55 is an excellent tire im runnin a 60 on my o6 r1

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post #22 of 156 (permalink) Old 10-09-2007, 09:50 PM
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i hope this works

I am buying some 209 GP's 190/60/17's from a guy on craigslist as we email. They are the ones made in Britan, not US. So, I do hope they work. Otherwise, it will be a bit of a hassle. Have a track day on Monday at Thunderhill in Ca. I went from stock 190'/50's to 190/55's. And now this 3rd set will be 190/60. I am looking for a quicker turn in.
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post #23 of 156 (permalink) Old 10-09-2007, 10:23 PM
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I am buying some 209 GP's 190/60/17's from a guy on craigslist as we email. They are the ones made in Britan, not US. So, I do hope they work. Otherwise, it will be a bit of a hassle. Have a track day on Monday at Thunderhill in Ca. I went from stock 190'/50's to 190/55's. And now this 3rd set will be 190/60. I am looking for a quicker turn in.

By increasing the rear tire aspect ratio, you are essentially raising the rear ride height, but there are other ways to achieve this as well. You could raise the rear ride height by altering the rear suspension (longer or shorter dogbones, not positive which on *your* bike). You can also increase turn-in by lowering the front of the bike in relation to the forks (move the top of the forks up relative to the triple clamps). There are some other options, but they are generally expensive (reducing rake by altering the upper triple clamp... for example).

You should ensure that the suspension preloads are set correctly. A really good description of how to check and set the front and rear preloads are shown in Lee Parks book Total Control: High Performance Street Riding Techniques. It also goes into suspension adjustments and some other aspects of machine set up. You may be trying to solve a problem with tire aspect that could be resolved with a simple suspension adjustment.

I'd also recommend Nick Ienatsch's book Sportbike Riding Techniques. Very helpful and easy to read.

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post #24 of 156 (permalink) Old 10-09-2007, 11:01 PM
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more than anything, a 55 profile is supposed to be an advantage over a 50 profile due to the larger contact patch when leant over.
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post #25 of 156 (permalink) Old 10-10-2007, 12:57 AM Thread Starter
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hi there all
Just to let you know one of the best mods i have done is changing the rear tyre to a 55 profile instead of the 50 profile.

1. The first big change is the way the bike tips into each corner it is very light which may put you off the first time that you ride it as it seems very unsteady but if you jump on a 600cc bike then jump back on your own bike you will see this is ok this why i changed this as i felt the 600 changed direction much quicker than my own, i have changed the suspension many times to try and adjust to the same direction as the 600 steering, i am not a mechanic but i have learnt a few things about set up this does work very well.

2. The next change was to line it holds when you have tipped into the corner it seems to hold the line much better it also seems to change direction through mid corner if you have to pick the bike up then lay it back down or if you are going through a number of S bends left and right direction changes are a lot easier with no rear grip issues at all.

3. I have done a few miles on the bike so the chain has expanded so there are no issues on the part that it may hit your swing arm i have also done a lot of miles on the bike on the one day so if the tyres heat up the are no issues were the tyre expanded and hit the swing arm and i cannot say that if buy a new chain and sprocket that there might not be an issue if you are using OEM sizes i have been told that if go down 1 sprocket size there will not be an issue with this and just to let you know this problem is only with 2004 and 2005 models with the shorter swing arm the 2006 model has a longer swing arm so you could put on bigger tyres the OEM set up.

I have noticed that i have a much better feel of what the front end is doing and inturn i have more confidence in the front and have went in much faster than i have before, i have been riding a bike since i was 8 years old, as i do not think that i am some kind of greart racer i do think i am quite a confident rider.

The only extra i have on is a akrapovic y piece so it has nothing to do with any extras fitted except for the 55 profile.

I hope this helps anybody thinking about this change as i had thought about this for a long time, yes it will feel totally different from what you have been used to that is why you will love it.

Cheers and happy riding.


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post #26 of 156 (permalink) Old 10-10-2007, 01:11 AM
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190/55 shouldnt be a problem. that size should have came stock...so much better in the turns. i believe the tire is 3/4 of an inch taller with the 55s vs 50s

heres a pic that i found useful.

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post #27 of 156 (permalink) Old 04-20-2008, 11:10 PM
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3. I have done a few miles on the bike so the chain has expanded so there are no issues on the part that it may hit your swing arm i have also done a lot of miles on the bike on the one day so if the tyres heat up the are no issues were the tyre expanded and hit the swing arm and i cannot say that if buy a new chain and sprocket that there might not be an issue if you are using OEM sizes i have been told that if go down 1 sprocket size there will not be an issue with this and just to let you know this problem is only with 2004 and 2005 models with the shorter swing arm the 2006 model has a longer swing arm so you could put on bigger tyres the OEM set up.



First of all I know this is an old thread, but I have read this paragraph 2 times and I must be retarted cuz im not getting it..
CAN SOMEONE TELL ME FOR SURE if I have a 2004 model with everything STOCK as far as chain, sprockets... WILL I HAVE ANY PROBLEMS fitting a 190/55 in the rear? "rubbing whatever" thanks
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post #28 of 156 (permalink) Old 04-21-2008, 06:35 AM
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Quote:
Originally Posted by $exy_Dirty View Post
3. I have done a few miles on the bike so the chain has expanded so there are no issues on the part that it may hit your swing arm i have also done a lot of miles on the bike on the one day so if the tyres heat up the are no issues were the tyre expanded and hit the swing arm and i cannot say that if buy a new chain and sprocket that there might not be an issue if you are using OEM sizes i have been told that if go down 1 sprocket size there will not be an issue with this and just to let you know this problem is only with 2004 and 2005 models with the shorter swing arm the 2006 model has a longer swing arm so you could put on bigger tyres the OEM set up.



First of all I know this is an old thread, but I have read this paragraph 2 times and I must be retarted cuz im not getting it..
CAN SOMEONE TELL ME FOR SURE if I have a 2004 model with everything STOCK as far as chain, sprockets... WILL I HAVE ANY PROBLEMS fitting a 190/55 in the rear? "rubbing whatever" thanks
No, you should not have any problem with the stock driveline. Dunlop lists the 190/50 as 24.81 inch diameter, and the 190/55 as a 25.38. There is a .57 inch difference in diameter, which would equate to a .285 change in height. Should be fine.


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post #29 of 156 (permalink) Old 04-21-2008, 11:26 PM
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I ride 190/55's with no problem at all.
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post #30 of 156 (permalink) Old 04-22-2008, 12:19 AM
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thanks folks!
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post #31 of 156 (permalink) Old 04-22-2008, 12:32 AM
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No problem. Hope you will enjoy your change as much as I did.
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post #32 of 156 (permalink) Old 04-22-2008, 12:38 AM
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thats what everyone say so im very excited, now just need to find a good deal on them and i'll place an order!
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post #33 of 156 (permalink) Old 09-03-2008, 11:23 AM
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tire fit

will a 200/55/17 or 200/50/17 fit on a stock 07 r1
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post #34 of 156 (permalink) Old 10-27-2008, 03:35 PM
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i ride with a 200 rear metz. no problems
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post #35 of 156 (permalink) Old 12-23-2008, 08:55 PM
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Quote:
Originally Posted by gumbydood View Post
By increasing the rear tire aspect ratio, you are essentially raising the rear ride height, but there are other ways to achieve this as well. You could raise the rear ride height by altering the rear suspension (longer or shorter dogbones, not positive which on *your* bike). You can also increase turn-in by lowering the front of the bike in relation to the forks (move the top of the forks up relative to the triple clamps). There are some other options, but they are generally expensive (reducing rake by altering the upper triple clamp... for example).

You should ensure that the suspension preloads are set correctly. A really good description of how to check and set the front and rear preloads are shown in Lee Parks book Total Control: High Performance Street Riding Techniques. It also goes into suspension adjustments and some other aspects of machine set up. You may be trying to solve a problem with tire aspect that could be resolved with a simple suspension adjustment.

I'd also recommend Nick Ienatsch's book Sportbike Riding Techniques. Very helpful and easy to read.
Wouldnt that be reducing trail?

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post #36 of 156 (permalink) Old 12-23-2008, 09:16 PM
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Quote:
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Wouldnt that be reducing trail?
Lowering the front will affect both rake and trail. But raising the back with a tire height increase will affect rake, but possibly not trail.

Generally there will be about a 1mm reduction in trail for a 4 mm change in height.

Make sense?


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post #37 of 156 (permalink) Old 12-23-2008, 09:57 PM
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Lowering the front will affect both rake and trail. But raising the back with a tire height increase will affect rake, but possibly not trail.

Generally there will be about a 1mm reduction in trail for a 4 mm change in height.

Make sense?
Thanks Dan,
I got it. Wondering if the poster did

Asked if he was afraid of dying in an accident, Marco Simoncelli responded: "No. You live more for five minutes going fast on a bike like that, than other people do in all of their life." rip #58 ciao ciao bello

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post #38 of 156 (permalink) Old 12-23-2008, 10:30 PM
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Thanks Dan,
I got it. Wondering if the poster did
No telling. It's one of those tricky areas like squat/anti-squat with suspensions that takes some looks.

With a good ride height adjustable shock, I'd take the larger rear tire. But for the stock suspension, I would go 120/70 front 190/55 and keep the fork tubes flush, and maybe even a little less sag in the front, maintaining a good balance of damping between the front and rear; before I played with the geometry much. The R1 is an extremely well balanced chassis by design. We just have to get it there to appreciate it.


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post #39 of 156 (permalink) Old 02-08-2009, 06:07 PM
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Am I going to have a problem with a 190/55 with a -1/+2 setup on an '07?

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post #40 of 156 (permalink) Old 02-08-2009, 06:13 PM
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Am I going to have a problem with a 190/55 with a -1/+2 setup on an '07?
nope
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