Test your tire knowledge?
- Thread starter Tufbusa
- Start date
if u have a 55 with 8 #s less air you still only have a 50
I think everyone agrees that the 55 series tire is taller and raises the rear slightly. For arguments sake, let's say the rear ride height is raised an average of 7mm. I checked Dunlops website and that seems to be very close using their Q2 tire.
The question was:
What are the advantages (If any) of using a 190/55/17 over the OEM 190/50/17?
Now that we have established the tire will indeed make the bike tip in a bit quicker, are there any other advantages to the 55 series tire?
Let's clear up the point that the taller tire is what adds quicker tip in, not the profile. Unless of course, the manufacturer has changed the actual profile of the tire to make it more agressive. If this is your argument, please identify the tire you are referring to so we all know which OEM has changed the profile of their 55 series tire!
By the way, you can achieve the same 7mm of ride height by adding a few turns to the rear preload.
The question was:
What are the advantages (If any) of using a 190/55/17 over the OEM 190/50/17?
Now that we have established the tire will indeed make the bike tip in a bit quicker, are there any other advantages to the 55 series tire?
Let's clear up the point that the taller tire is what adds quicker tip in, not the profile. Unless of course, the manufacturer has changed the actual profile of the tire to make it more agressive. If this is your argument, please identify the tire you are referring to so we all know which OEM has changed the profile of their 55 series tire!
By the way, you can achieve the same 7mm of ride height by adding a few turns to the rear preload.
Last edited:
suzuka1980
Registered
I dunno the advantages, but I use the stock sizing...
what do mean by profile? isnt profile the shape of the tread area? if so then that would be affected by aspect ratio...
either way its a 5 percent increase of 190....
190x5%=9.5mm every tire manufacter has a little descrepancy in height and width so it can vary from there but thats the formula for figuring it.
this is highly reliant upon the tire maker.. numbers in this case lie..
A shinko for instance has a very FLAT profile
A Pirelli has a very tall profile..
the extra 5% makes a varied difference between both tires...
Bridgestone flat out lies about their tire (190 is physically a 198 Hmmmm)
These numbers are all "relative" in the first place and so discussions about particular profiles get muddled up...
one makers tire is going to be different from another makers tire when talking identical sizes.. (wonderful huh?)
I gotta go with Todd and his "tire pressure" comment
flat tire is shorter than one aired up to 42PSI..
and Rich is still 50% off.... he always will be...
(no not picking on you either.. )
Last edited:
TruWrecks
Banned
Easier turn-in because the height change in the rear shortens the wheelbase slightly and changes the steering head/fork angle, making it more maneuverable and less stable.
Better top speed/mileage. The 55 tire becomes roughly a 2.5% overdrive to the gearing is being used.
Ideally, if the 50 and 55 are a true representative of the sidewall percentage the 55 series tire would have more usable sidewall for the same profile.
The size of the contact patch depends entirely on the profile shape of the tire. A flat tire profile will have less contact the further it is leaned over. A round tire profile will maintain a more uniform contact patch at almost any angle. More egg shaped profiles have an increased contact patch when leaned, and less when upright.
Better top speed/mileage. The 55 tire becomes roughly a 2.5% overdrive to the gearing is being used.
Ideally, if the 50 and 55 are a true representative of the sidewall percentage the 55 series tire would have more usable sidewall for the same profile.
The size of the contact patch depends entirely on the profile shape of the tire. A flat tire profile will have less contact the further it is leaned over. A round tire profile will maintain a more uniform contact patch at almost any angle. More egg shaped profiles have an increased contact patch when leaned, and less when upright.
different tire spring rate.
you are a sad man...
:tiptoe:
you are a sad man...
this is highly reliant upon the tire maker.. numbers in this case lie..
A shinko for instance has a very FLAT profile
A Pirelli has a very tall profile..
the extra 5% makes a varied difference between both tires...
Bridgestone flat out lies about their tire (190 is physically a 198 Hmmmm)
These numbers are all "relative" in the first place and so discussions about particular profiles get muddled up...
one makers tire is going to be different from another makers tire when talking identical sizes.. (wonderful huh?)
I gotta go with Todd and his "tire pressure" comment
flat tire is shorter than one aired up to 42PSI..
and Rich is still 50% off.... he always will be...
Does Shinko make a 190/55 ???
Tire pressure
Pre load
How does the tire height SHORTEN the wheelbase ???
Unless you shorten the length of the chain, or put a larger rear sprocket on the bike...the axle is in the same location
I think everyone agrees that the 55 series tire is taller and raises the rear slightly. For arguments sake, let's say the rear ride height is raised an average of 7mm. I checked Dunlops website and that seems to be very close using their Q2 tire.
The question was:
What are the advantages (If any) of using a 190/55/17 over the OEM 190/50/17?
Now that we have established the tire will indeed make the bike tip in a bit quicker, are there any other advantages to the 55 series tire?
Let's clear up the point that the taller tire is what adds quicker tip in, not the profile. Unless of course, the manufacturer has changed the actual profile of the tire to make it more agressive.
By the way, you can achieve the same 7mm of ride height by adding a few turns to the rear preload.
Bro...you are comparing a 55 to a 50...the height AND the "more aggressive" profile adds to tip in response
Upgraded~?~
I get the feeling we're going to get the tire comparison punch line shortly~!~
One of the early posts advises it's = to a gear tooth change on the rear...I might be wrong, but I think it's close to a half tooth difference...
As said, it'll lift the rear end up enough to help leaning in the twisties...might also need to stiffen the front a bit also...but not a lot of difference in height (taller shock mount or bone usually works better)
Wheelies (balance point) are easier with a lifted rear end, but not with more meat on the tire (try a 200 sometime)
Usually the 55's that I tend to run are race rubber which are a lot stickier than OEM rubber (I still run my ol 2CT's on the street~!~)
I'm surely no tire pro, but some thoughts on it~!~
Did I at least get a C- ~?~
lease:
Last edited:
TruWrecks
Banned
How does the tire height SHORTEN the wheelbase ???
Unless you shorten the length of the chain, or put a larger rear sprocket on the bike...the axle is in the same location
The rake and head angle are changed, effectively shortening the distance between where the tires contact the ground. As you raise the rear of the bike higher the front tire moves closer. It's a very small amount, but it is shorter. Try it with a protractor and you will see it.
Probably don't have to worry so much on the Busa as stable a ride as it is...but when lifting up the rear on other bikes you want to watch for the ol tank slapper...get a very good damper
