Lunchtime! It's time for your meds TP:sleeping:
Ok kids, I'll play
This is timely because 2018 is the 30th year anniversary of radial tires on production motorcycles! Lets all have cake!
Prepare for some foggy memories from your dorky uncle Coot
In the hey day of drum brakes, spoke wheels and bias ply tires, a 3.5" wide tire was plenty for a performance motorcycle, including the mighty CB 750. That worked until the undauntable Freddie Spencers 1981 Honda 500 HRC won with a Michelin radial tire (in the rear). He said “The introduction of the radial tire was the most important innovation of my career". Well when Freddie talks, you better listen. And they did.
Hello you gorgeous 1983 Honda V 1000R. That was Pirellis first production motorcycle radial tire and built specifically for that bad boy, but for Europe only
(140/80-17 for the states).
Still in the good ol US of A, even the best liter bikes like my 125hp, 159mph top speed, and 559lbs(!!) 1986 Ninja 1000R ran a 150/80-16 bias. I remember the GSXR having 140/70-18's that year. Good God that was a game changer. Someone actually thought about power to weight ratio in a production bike. Why did THAT take so long?? In 1988 they all got 160/60-17 radials, wider still!
Ok, so thats highlights of radial vs. bias, it's pertinent because the different construction of the tires allows a different
profile of the carcass. So notice how the widths are growing! But verrrry slowly. Decades even. The tires profile is also massively affected by the width of the wheel, so swapping a wider tire on a wheel meant for a narrow tire is doubling the mistake.
Currently 190mm is the widest (that I'm aware of) that you'll find on a bike meant to turn corners, not just turn into the local bar. It's not because it's a compromise, any MFG could easily go wider if it was a good idea, but apparently the additional weight, rotating mass, and performance
de-crease is not something they want.
I'm only posting to let someone that could be reading this, and a little unsure, that without a doubt the single only reason to put a wide domed tire on your bike is for looks. If thats your thing, go for it. Otherwise, in every single other aspect, it reduces the capabilities of your motorcycle.
Cornering? No. See MotoGP or
any other motorcycle racing. Marc Marquez can drag an elbow with a 64* lean angle(!!) on a 190-65/16.5 rear tire, I'll stick with what the pros do. If drag racing is your thing you'll use a wider/
flatter tire for contact patch, but not a hard one like TP's. A wide rear tire for drag racing won't last you 26
thousand miles like he says his does.
Wet weather? No. A narrower tire has to disperse
less water to resist hydroplaning. Traction is vastly increased by adding Silica to the rubber compound (started in 1990) but you can't get traction if your rubber is floating on water.
Braking? Your rear is only good for 10% of your braking, will a couple more mm of contact patch even measurably matter?
Longevity? More contact patch=more wear. Durometer of the rubber compound (treadwear) is what dictates traction vs. mileage. Besides, don't you want a tire to last longer only to save cost? Whats that wide tire mod cost?? ROI? not hardly...
"Smoothness"? Aren't all tires round??
The bigger rear tire will be heavier, much more expensive to modify (a non-OEM welded wheel scares the snot out of me), much more expensive to buy, kill your warranty (if you have one), harder to ride (ever seen someone turn around in one of those silly Hyabusas?? haha), will hydroplane in the wet (but that will also ruin the neon and the stereo on your show bike too).
Enjoy your tire cake!