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WHEN PUTTING A 150/70/17 R DO I HAVE TO PUT A BIGGER RIM? AND IF I DONT NEED A BIGGER RIMS WILL THE 150 RUB AGAINST THE SWINGARM?
 

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You must not but highly recommended.A 150/70-17 will not rub the swingarm.Anyway a 140/70-17 is more suited on our 3.5" rim becourse it's still in there recommended save tolarance.
 

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eric said:
You must not but highly recommended.A 150/70-17 will not rub the swingarm.Anyway a 140/70-17 is more suited on our 3.5" rim becourse it's still in there recommended save tolarance.
+1

i dont think that the stock size are all that bad tbh, i havnt had any problems with them
 

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no. and once again, your caps lock is stuck on.

150 is the max you should go before getting a different rim, and if you look for the thread in modifications by eric, you will see how he modified his to fit a larger rim.
 

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there would be a larger drag area so it might affect your top speed but i dont think it would affect you handeling that much...might make it worse because of the larget tire to lean on to. but i dunno, eric?
 

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how often do you kneedrag on the ninja?

get some pics of your ninja up!
 

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Yeah we all do want it to look buffy. ;) .. It really depends on you riding skills.. Some like the upgrade for the handling, others for looks.
 

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See what the pro racers did for mods.

http://www.sportrider.com/features/146_0903_2008_kawasaki_ninja_250/index.html

Lets look at some numbers

tire size- 150/60/17 140/70/17 150/70/17 130/70/17
diameter- 24.087 24.717 25.268 24.165
circumference- 75.671 77.651 79.382 75.917

140's and 130's are going to be similar. 140 will be approx .50 inches wider.
150/60 (4.00 in rim or bigger recommended) will be approx .80-1.0 in. wider depending on the tire design. however the tire might become more oval on a 3.75 in. rim.

Benefit is nominal unless you get a wider rim, but you will lose a little ''flickability".
Either way the speedo will still be off. More so with a wider lower profile tire. Speedos on the Ninjas or off by 5-7% (reads too high), even higher as you pass 90mph. 150/70 will put it closer to an actual (correct) reading, but you may loose top end speed. I'm sure someone will correct me if I am in error.
 

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metbandit1 said:
there would be a larger drag area so it might affect your top speed but i dont think it would affect you handeling that much...might make it worse because of the larget tire to lean on to. but i dunno, eric?
Lets steal an ege out of the fridge.Put it on the table w the pointed side down.That's about the shape of the cross section of a 150/60-17 on our 3.5" rear rim touching the tarmac.Lean the ege a little to one side.There is almost same footprint as w it's streight.Now lean it further to about 45' and suddenly you are approachingon the area where the foodprint is enlarging.This is the critical area.It's where the tire become unstable between low and high grip.
Turn the ege over and put the other side down.Now you are looking at the cross section of a 140/70-17.No matter how far you lean it the footprint will stay almost the same all time.So does the grip.
A 150/70-17 will be somewhere in between.
Get the picture?
Now knock that ege into a pan and fry it.

haha a 250! said:
oh then i think i made up my mind im gonna get 150/60-17 but wat brand of tire for the street and the track?
You will be better of with a 150/70-17.Reasoned above.
 
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