so my revzilla return has just completed today. now im back looking at tires. Looking at the Avon AM26 Roadriders. Just curious. has anyone tried the stock sizes 110/x/17s in the front and 130/x/17s in the back, but instead of 70's gone to 80s? Just curious on how this would make the bike feel. Obviously its gonna lend on the more "responsive" side of things, but anyone who's tried, think it gets too squirrely?
Obviously squeezing a fatter tire into a narrower rim will result in a smaller radius tire, it'll probably want to "turn in" easier. You'll also see increased tread wear on the center line due to a smaller contact patch, and reduced traction overall because of the same.
I'd recommend going with stock sizes always.
Quote from: Watcher on May 03, 2017, 08:09:59 PM
Obviously squeezing a fatter tire into a narrower rim will result in a smaller radius tire, it'll probably want to "turn in" easier. You'll also see increased tread wear on the center line due to a smaller contact patch, and reduced traction overall because of the same.
I'd recommend going with stock sizes always.
Wut?.. those are stock tire sizes.... they are just taller by 10%.
For example front stock is 110/70/17 - 110 + 110mm overall thickness of the tire. 70 = 70% of the tires thickness is it's height. and 17 = 17 inch rim size.
so I'm talking about going 110/80/17, so I'm thinking about going from 77mm tire height to 88mm tire height. There would be no "stretching" of the tire.
Oh, my mistake. 9/10 times this discussion is about going wider, I skimmed through and "copy/paste" the typical response.
Man, my head ain't in it lately...
But I wonder if going taller would have the same effect, though.
Essentially what you do when you squeeze on a slightly wider tire is make it the proper width and add height to it...
At any rate, stock is stock. Changing the aspect ratio is changing the tire to a different specification, it's no longer stock.
Stock width, maybe...
I've run 110/70, 110/80, 120/70 front and 130/70, 130/80, 130/90, 140/70, 140/80, 150/60, 150/70 rear tires on my GSs on the stock 3.0 and 3.5" wheels. All of the tires I've run have been fitments approved by the tires maker except the 150/60 rear. The difference in handling due to tire size is hardly noticeable compared to the difference due to type of tire.
I had a taller tire and did not like it with a stock sized front. It changes the steering and effectively the gearing. I would stick with the stock size unless you just want to experiment.
Quote from: Bluesmudge on May 04, 2017, 09:12:39 AM
I had a taller tire and did not like it with a stock sized front. It changes the steering and effectively the gearing. I would stick with the stock size unless you just want to experiment.
yup, exactly what im doing, is trying to experiment a little. I ordered the 80 talls.
here's my thought, by increasing to 80 talls, I up my tire size by 10mm, but that's not the only thing that I up, It also up the circumference slightly.
circumference
3196.884684293184mm /:/ 77mm
3265.999722672164mm /:/ 88mm
the difference is this allows for 2.11% increase in the circumference. Say the stock sizes get 15,000 miles on a tire, then in theory the tire receives a 2.11% lifespan or 316.5 miles. its not much, barely 2 tanks full of gas. but its a 2% increase in life span for $8.26 USD. LESS than [currently] a tank of gas...
Yes, I take being a cheap arse to a whole new level.
oooo they had my tires in GA. ill be getting them tomorrow! if UPS isn't slow about actually getting them to my house, maybe even mounted tomorrow... gonna wake up and take the rims off the bike. AGAIN, in a week... :icon_lol:
Actually, the "80" number is the height in percentage to the width..... So a 130-70 tire is 91mm tall, while a 130-80 tire is 104mm tall. That's according to "math", not to each tire manufacturer, so the actual numbers may differ.
And I want to point out: rear tires generally last much less than front tires. So while the front can get 15k miles, the rear may get 8k miles.
Regardless Walker, you're not going crazy by fitting a car tire on a GS rim. Any changes will be rather insignificant, and you will adapt to them quickly.
Just remember that mostly , higher profile tyres are also heavier ( sometimes a lot). Bigger circumference, more rubber and chord/steel. The heaviest rear tyre I ever measures the weight for was a 80 profile.
Sometimes enough difference to make the tyre harder to lean ( even the back).
On one of my tiny race bikes I put a 130/80 on the back because it was the only 130 available at the time. It was almost impossible to fight it over to corner ( admittedly the whole bike only weighed 70kg).
Quote from: J_Walker on May 04, 2017, 10:30:14 AM
the difference is this allows for 2.11% increase in the circumference. Say the stock sizes get 15,000 miles on a tire, then in theory the tire receives a 2.11% lifespan or 316.5 miles. its not much, barely 2 tanks full of gas. but its a 2% increase in life span for $8.26 USD. LESS than [currently] a tank of gas...
Yes, I take being a cheap arse to a whole new level.
I used the same logic once when ordering a new chain and sprocket set. I got more teeth front and rear (3 in the rear cancles out 1 in the front) and got a longer chain to match. I figured a chain that is 5% longer would last 5% longer. Also more sprocket teeth means less wear on each tooth. It probably wasn't worth the trouble but I couldn't help myself.
I got my tire in the mail, and mounted today.
(http://i.imgur.com/gYftJit.jpg)
I think the only issue was I had to raise the rear a little higher to get the tire under my mud fender. and the front tire needed to be gently smacked past the caliper.. its rideable again! next few days I'm going to be working on cosmetically giving it some lovin. like tidying up the wiring under the seat [that duct tape is holding it all in there... looks like a rats nest :D ] and getting around to re-doing my seat. it looks SO much worse then it did orginally because I've unsewn/stapled it and stuffed more foam in it like 4 times now.. at least now I know how much I need. but im trying to keep an eye out for an old 1 piece honda seat. and ill just adapt that too the GS. As I've gotten quotes for good new foam, and its running about 200 dollars for the whole seat, and that's without any fancy gel layers...