Again, 180 VS !90

[Danz19899]

I'm sure this topic has been beat to death before but

I just bought a new set of wheels and they came with a damn 190 on the rear. its stock a 180. I was planning on using these as my street/track rain tires since my Bt 002's suck in the rain but will the 190 make a big difference at the track

I've done some street riding and it feels fine just wondering track wise

[dudutzu]

same profile? I mean 180/55 vs 190/55?
with the 190 you get more contact patch which is good for track use
and since the tire is bigger your gearing is taller now, a smaller front sprocket or bigger rear would fix that if you really wanna be where you were before
and the rear of the bike would be a few mm higher, again usually not a big deal unless you doing 18's

[DucDave]

same profile? I mean 180/55 vs 190/55?
with the 190 you get more contact patch which is good for track use
and since the tire is bigger your gearing is taller now, a smaller front sprocket or bigger rear would fix that if you really wanna be where you were before
and the rear of the bike would be a few mm higher, again usually not a big deal unless you doing 18's

hmmm, squeezing a 190 on a wheel meant for 180 should make the profile a little pointier...ie, less contact patch when straight up than if the 190 were on a wider wheel. So, probably OK in the rain.

My sense is a wider profile in the rain is not an advantage...
...but I also predict that you will get so many opinions on this thread as to make it essentially useless.

Unless, by some freak of NESR Nature, someone actually digs up and posts some relevant facts...!

[reiobard]

someone actually digs up and posts some relevant facts...!

good luck with that....

BTW, i am planning on running a 190 for my next tire, I got a brandy new 190 for a good price (Free) so i will be putting that on for my next rear and see how it goes.

I doubt that i am ever going to ride to the point where it will matter anyway. but if it sucks then i am only out the free that the tire cost.

[klp]

I run a 190/55 on my 07 zx6r, bought it from Penguin who told me they run them on all their supersport bikes. It does raise the rear a bit which quickens the turn in. You could always compensate by raising the front but I like the way it handles. And it looks pretty badass.

[dudutzu]

hmmm, squeezing a 190 on a wheel meant for 180 should make the profile a little pointier...ie, less contact patch when straight up than if the 190 were on a wider wheel. So, probably OK in the rain.

My sense is a wider profile in the rain is not an advantage...
...but I also predict that you will get so many opinions on this thread as to make it essentially useless.

Unless, by some freak of NESR Nature, someone actually digs up and posts some relevant facts...!

right, but I meant for track use, like while leaned over contact patch

[13]

I went from a 180 to a 190 on the 600 and liked the ever so slight "gearing" change, then went to a 200 series. I like it even better. Not sure if it made a difference in laptimes, but it makes a difference in my head.

[DucDave]

Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_3 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16)

The original question was regarding using an oversized tire as a rain tire ...

[ɹǝʍoןandɹǝʍoן]

Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_3 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16)

The original question was regarding using an oversized tire as a rain tire ...

... but will the 190 make a big difference at the track

I've done some street riding and it feels fine just wondering track wise

[slammp]

I ride a 180 on my 10 speed. Anything less doesn't provide enough bite when the calf powered tork kicks in.

[kb1]

I run a 190/55 on my 07 zx6r, bought it from Penguin who told me they run them on all their supersport bikes. It does raise the rear a bit which quickens the turn in. You could always compensate by raising the front but I like the way it handles. And it looks pretty badass.

Wouldn't a 180 have a quicker turn in because it's a smaller tire??

[klp]

Wouldn't a 180 have a quicker turn in because it's a smaller tire??

I guess all things being equal (rear ride height) the 180 would change direction easier due to being a little lighter and smaller. The 190 is slightly taller. Raising the rear decreases trail in the front end which makes for quicker turn in.

[dudutzu]

I guess all things being equal (rear ride height) the 180 would change direction easier due to being a little lighter and smaller. The 190 is slightly taller. Raising the rear decreases trail in the front end which makes for quicker turn in.

so if the ride height is adjusted for the bigger tire and the tires have same profile(55) how would a 180 make the bike turn in quicker?

[Stoneman]

Okay, just to be clear...

180/190 refers to the WIDTH
50/55 refers to the 'profile'

Thus a 180/55 and a 190/55 will most likely NOT change the ride height and would NOT result in a phantom 'gearing' change. Going from a 180/55 to a 190/50 would though...

[CEO]

Okay, just to be clear...

180/190 refers to the WIDTH
50/55 refers to the 'profile'

Thus a 180/55 and a 190/55 will most likely NOT change the ride height and would NOT result in a phantom 'gearing' change. Going from a 180/55 to a 190/50 would though...

55 is the RATIO of the sidewall height to the tire width. It is not the thickness/sidewall height itself.

A 180/55 and 190/55 are NOT the same height...

I.e. 180/55 sidewall height is 180*.55 = 99

190/55 sidewall height is 190*.55 = 104.5

Difference is 5.5 and since two sidewalls influence height that's 11...


However this is arbitrary since
1. sidewall height doesn't take into account differences in height due to profile and
2. the measurements (i.e. 180) are different for different manufacturers (for example dunlop numbers are higher than actual width)


If you assumed same profile height and numbers listed are correct, than a 180/55 would be 4mm taller than a 190/50 per sidewall aka 8mm total taller.

So those are actually closer than the 180/55 and 190/55 you mentioned above.

AKA YOUR DUMB, STONEJEW!

[Danz19899]

the bike is definitely a little higher in the rear but i'm loving the better turn in. to the point where i ordered some shims to raise the rear a little with my 180 DOT's on it. makes the bike feel a bit smoother and more planted

[Stoneman]

55 is the RATIO of the sidewall height to the tire width. It is not the thickness/sidewall height itself.

A 180/55 and 190/55 are NOT the same height...

I.e. 180/55 sidewall height is 180*.55 = 99

190/55 sidewall height is 190*.55 = 104.5

Difference is 5.5 and since two sidewalls influence height that's 11...


However this is arbitrary since
1. sidewall height doesn't take into account differences in height due to profile and
2. the measurements (i.e. 180) are different for different manufacturers (for example dunlop numbers are higher than actual width)


If you assumed same profile height and numbers listed are correct, than a 180/55 would be 4mm taller than a 190/50 per sidewall aka 8mm total taller.

So those are actually closer than the 180/55 and 190/55 you mentioned above.

AKA YOUR DUMB, STONEJEW!

Yes, I'm dumb. But I fully understand the relationships, I was trying to keep it simple. Too many people are overly confused about the width/height ratios/numbers, etc...

[dudutzu]

I hope this clears out some things for you guys

[reiobard]

I hope this clears out some things for you guys

Makes me happy, 180/55 and 190/55 are almost identical...

[Danz19899]

Only thing thats a little weird is since its only on a 5.5inch rim the very edges of the tires are pulled in a bit more

[DuncanMoto]

Those colors are way to close to figure out what the F' is going on.

On top of all the BS in this thread, different tire companies make different profile shapes and use a different way of measuring the profile.

BTW - CEO was the most accurate of all of you F'ers. Listen to him and don;t look at that BS graph.
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.And Jay... you suck and I can drinrielk yiouo unbduer the tbal;'kbl fuygvucdklER!!!