Yes, you can calculate a mathematical difference...but it is too small to make a noticeable difference in performance...you're splitting hairs on that one buddy
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- Thread starter Tufbusa
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Yes, you can calculate a mathematical difference...but it is too small to make a noticeable difference in performance...you're splitting hairs on that one buddy
TruWrecks
Banned
Yes, you can calculate a mathematical difference...but it is too small to make a noticeable difference in performance...you're splitting hairs on that one buddy
Who was splitting hairs on this one Rich?
It's a very small, but very welcome difference for cornering.
I wanna I wanna~!~
But I'm Bald~!~
But I'm Bald~!~
Cookie
Registered
HEY! I RESEMBLE THAT COMMENT!
knew someone would catch that... now,
My world is round, Magellan! I have no corner!
My world is round, Magellan! I have no corner!
You can still lean in a straight line...when the wind is right~!~
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
Rake and head angle are one in the same. I think what you are referring to is Rake & Trail?
Yes, you can calculate a mathematical difference...but it is too small to make a noticeable difference in performance...you're splitting hairs on that one buddy
You are absolutely correct. Theoretically, if you raise the rear axle it will shorten the wheel base. In this case where the taller tire is raising the rear axle by 7mm the wheelbase will be shorten by some minute portion of a milimeter. However, I think you would need some high end calibration device to measure it. The difference in WB would not be enough to make any sort of noticeable difference in performance.
Who was splitting hairs on this one Rich?
It's a very small, but very welcome difference for cornering.
Let me help you two out a little on what the 7mm of rear ride height actually accomplishes.
If my memeory serves me well, it takes 4mm or rear ride height to shorten the trail 1mm. So the 7mm of added ride height shortens the trail by 1.75mm. This is not much and the average rider will notice little if any difference but the hard core well schooled racer will notice a difference in the way the bike steers.
All the charts will vary...if you do the math. The answer is 9.5mm...
190/50=95mm
190/55=104.5mm
The difference is 9.5mm...that is in the radius...the diameter difference is 19mm. Approximately .75"
All the charts will vary...if you do the math. The answer is 9.5mm...
190/50=95mm
190/55=104.5mm
The difference is 9.5mm...that is in the radius...the diameter difference is 19mm. Approximately .75"
That is a great equasion to get a general number. However, no two 190 tires from different manufacturers will have the same OD. The only true way to find the proper number for any given tire is to use the OD of each tire which you can find on most all manufacturer's website, subtract the difference and divide by 2. This will give you an absolute difference in ride height numbers.
The information I used from Dunlop's website on the Q2 was slightly over 7mm but if I calculate using your equasion it's 9.5mm. The differences in tire profiles makes your equasion inaccurate for most all tires.
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And not ALL 190's from the SAME manufacturer will have the same OD...the charts are what they designed the tire specs to be, there are always variables from tire to tire. We know that the number stamped on the side of a tire is not exact...
You asked a question...and I answered it. The ONLY equation possible is the one that I used. The variances between Dunlop, Bridgestone, Pirelli...etc etc are endless...even the tires from just ONE of those makers will vary...that is why we have adjustments on our suspension systems.
9.5mm is how much a 190/55-17 raises the rear of a bike vs. a 190/50-17
What is this thread really about anyway?
Calculating to the mm the diameter of tires?
I'd rather be ridiing.
Spring is a looooooooong way off.
I have no idea
The OP...or should I say 'that old fooker' just likes to stir the pot
I'm gonna go out for a ride...see you doods later
spikes
What is this thread really about anyway?
Calculating to the mm the diameter of tires?
I'd rather be ridiing.
Spring is a looooooooong way off.
You best enjoy threads like this to keep you occupied. It's a very long time til spring in your neck of the frozen tundra big boy
I think this is a great thread. There are tons of threads on what tire is best but none on why or how their favorite tire does what it does.
I hope there will be some who will gather useable information from this thread they can use when choosing tires. The one who makes the best decisions is usually the one with the most information.
There are point's no one has touched on. If no one brings them up, I'll point them out tomorrow.
You fella's running a 190/55 tire, post up and tell us why you prefer the 55 over the 50!
mike1180
Banned
I do like it.
Only cause we get to butt a bit Tuf.
We have already worked the 80W90 to death so....
JMO but I bought the 50's in the BT016's because they were about $75 cheaper than the 55's, and had 1/32 more tread.
But as I ride, I do constantly think about the 7mm I am missing.
Only cause we get to butt a bit Tuf.
We have already worked the 80W90 to death so....
JMO but I bought the 50's in the BT016's because they were about $75 cheaper than the 55's, and had 1/32 more tread.
But as I ride, I do constantly think about the 7mm I am missing.
mike1180
Banned
I have no idea
The OP...or should I say 'that old fooker' just likes to stir the pot
I'm gonna go out for a ride...see you doods later
GGGRRrrrrrr. I won't be out until March now.
Enjoy brother.
