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Message started by MMRanch on 12/02/08 at 20:03:10

Title: Tire goodrich 155/80-15
Post by MMRanch on 12/02/08 at 20:03:10

It's posible ! I just put a 155/80-15 GOODRICH RADIAL TA on the back of my savage. No mods nessary...It seated at 76 psi with half and half dishwashing soap, water. I did bring it up to 50 psi to day befor and left it sit overnight to stretch a little. If it were any bigger it would catch the bolt heads holding the crome things on the side of the fender. There is about a half inch clearence on the belt side and three fourths on the high side, there is almost an inch to the middle of the swing arm. The only delima is "what about one side being raised white letter and the other side black letters?"
Though ya'll might use this information.

The mitchlin 145r-15 I replaced needed over a 100 psi (guage only goes to 100) to seat and latter developed a BUBBLE in the side wall.

Title: Re: Tire goodrich 155/80-15
Post by Oldfeller on 12/06/08 at 14:08:08

Gasp! Oh my goodness!

That's a car tire! On the back of a motorcycle no less!

Don't you know that isn't safe, that you will slide over on that thing just as soon as you try to go around a corner?

;D ;D ;D

===========

Give us a ride report, oh you experienced Darkside rider you. You must tell the story of first "getting your hindbrain used to it" and the story of what a full lock emergency sliding stop sounds like. Tell the youngsters what they have to look forward to, if they can survive mounting their tire that is.

Leaving your pressure jacked up over 35 psi can do some internal damage to a tire if it is left that way for very long. 50 lbs it certainly too much to leave that way for very long.

Don't forget to write down the date and your odometer mileage on the inside of your fender with a sharpie pen so you can eventually report how long and how many miles you got, assuming you don't throw another sidewall bubble from running too much air pressure in your tire again.

And for the rest of you, you who are going to put yet another expensive bike tire on the back of your Savage this summer, I have a special message for you from the founding father of the Darkside Boys

yeah, ol' dangerous Freddy's singing to you again ......

http://www.youtube.com/watch?v=hMenB9Ywh2Q&feature=PlayList&p=4BF32CB8D7FA620F&index=0

Title: Re: Tire goodrich 155/80-15
Post by MMRanch on 12/08/08 at 07:20:45

Hi Oldfeller

yea I've done it again. The mitchlin ZXZ 145r-15 went 9,636 miles and still had 2/3 of the tread left. The ZXZ took some getting used to, the way it fit the rim left the tire sitting flat as a board against the road. After a couple hundred miles I was dragging the pegs on the road I live on (129 out of Lynchburg TN). yee/haa

The 155/80-15 BF GoodRich TA has been a different story from the start. It mounted easly and fits with a slight rounded profile (It FELT LIKE HAVING A BIKE TIRE AGAIN) and took no getting used to. Due to weather I have only one short (15 mile) + freezing trip on this one , But it felt surefooted and stable just as much as any tire I've be on (39 years of riding)

I have read other DarkSiders sugesting riding 35 to 40 psi ??? is that going to get the sidewall of this on too. I supected the seating priesure came back to haunt me on the first one. I've never worked in the tire industry , just what I read (limited)

I'll go to rubber side down next time, should I try to restart there now?

Title: Re: Tire goodrich 155/80-15
Post by MMRanch on 12/08/08 at 07:23:49

Side clearence

Title: Re: Tire goodrich 155/80-15
Post by MMRanch on 12/08/08 at 07:32:22

side view 155/80 -15

Title: Re: Tire goodrich 155/80-15
Post by mpescatori on 01/27/09 at 05:06:37

Nice tire but it looks awfully underinflated... :-?

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/27/09 at 15:41:28

0D2E2624272E2E2730420 wrote:

WOW!! Slide over as soon as you try to go around a corner? What idiot ever said anything like that? Everyone knows that a car tire is every bit as good as a motorcycle tire. You don't need a tire that curves to match the lean of the motorcycle. You don't need a softer stickier rubber.

You also don't need to wear leather, nor a crash helmet. The unexpected will never come up and you will never need that tiny margin of safety provided by a tire designed for a motorcycle.

If you run thousands of miles every year and want to save a few bucks, go ahead and use a car tire. But to imply that a car tire will give you the traction of a motorcycle tire would be criminal; if anyone was stupid enough to believe it.

Title: Re: Tire goodrich 155/80-15
Post by rodeoman on 01/28/09 at 01:00:13

why do you want to use a car tire? I'm a "newbee" but wont you sacrifice safty and handling and saftey? I run a 150 moto and it turns a little harder, do you know somthing I don't???? I try not to do many mods that dont ether: stop, go, or TURN better. please explin the choice I want to learn!!

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/28/09 at 06:39:02

2C313A3B31333F305E0 wrote:

why do you want to use a car tire? !!

Mileage.

A car tire is made with a flat bottom and harder rubber. While upright the car tire is actually a better choice as the wider contact gives traction without having to resort to soft rubber. The harder rubber wears a LOT slower. For touring and long distance commuting where you are putting on 10,000 miles or more every year, nearly all upright, a car tire will save you a hundred+ dollars a year.

Title: Re: Tire goodrich 155/80-15
Post by Oldfeller on 01/28/09 at 14:54:12

That's a hundred dollars a year ..... for 4-5 years. And some of us who have actually done it keep saying you can go around corners just fine.

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/28/09 at 15:09:24

I know you keep saying that. But do you have the same margin of safety that a motorcycle tire will give you? Answer: No. Not physically possible. That is why motorcycle tires are made the way they are.

Title: Re: Tire goodrich 155/80-15
Post by verslagen1 on 01/28/09 at 16:58:11

5E6F626F6A67600E0 wrote:

In general, motorcycle tires offer the most for motorcycles.
Otherwise those boys with knee sliders would be using them.
But, for the more sedate that end up with a flat bottomed tire wouldn't it be better to start out with one?
And for those that do, do you end up with round bottomed tires?

Besides, when I was taught to ride, they told me to straighten up to panic stop. Here's where the flat bottomed tire will excell.

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/29/09 at 06:48:04

I was taught to avoid panic stops. In the MSF course they taught, that when in a turn, to straighten up and then brake -- which got a silent WTF from me. I regularly accelerate/brake when leaned over.

Title: Re: Tire goodrich 155/80-15
Post by verslagen1 on 01/29/09 at 08:09:35

yes, but you know how to do them right?
of course, we do what we have to do then live with the consequences.

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/29/09 at 09:35:08

A true panic stop is one of those "I know what I should do or would like to do" things. Those things where you surprise yourself when the trigger event actually happens. You can practice all you want, but until the event comes and it is time to react you cannot know how you actually will react.

www.m-w.com: Handicap: 1 a: a race or contest in which an artificial advantage is given or disadvantage imposed on a contestant to equalize chances of winning....

When you are too good, you are given a handicap to equalize you down to normal standards. When it comes to motorcycle handling, a car tire is a handicap. If you are good, it doesn't matter. I'm not that good.

Title: Re: Tire goodrich 155/80-15
Post by verslagen1 on 01/29/09 at 11:40:10

:-? I don't know where you are going with that line of logic.

point is most people will try to straighten out the bike when a panic stop must be initiated. This is to minimize sliding to the side and low siding.

Car tires are made to follow uneven surfaces and roll laterally in turns to keep a maximum contact patch. Cars have negative camber on the outside wheel to counter this.

So for most people, trained to straighten in panic stops and tires that will maintain a larger than m/c contact patch up to a minor turn (less than 15° lean) a car tire is an advantage.

Title: Re: Tire goodrich 155/80-15
Post by Paladin. on 01/29/09 at 15:24:03

2D3E2928373A3C3E356A5B0 wrote:

Will they? Just because they were told to do so in class doesn't mean they will. Even practicing panic stops does not mean you actually will straighten up and stop when in a real panic. I have absolutely no idea of what I would actually do in a panic situation. And I rather NOT find out. Just as I would rather not find out how fast I can take a turn.

Quote:

Car tires are made to follow uneven surfaces and roll laterally in turns to keep a maximum contact patch. Cars have negative camber on the outside wheel to counter this.

So for most people, trained to straighten in panic stops and tires that will maintain a larger than m/c contact patch up to a minor turn (less than 15° lean) a car tire is an advantage.

Contact patch is not the only varible when it comes to traction. The psi loading on that patch matters, as does the stickyness of the rubber. But I'm really not concerned with straight line performance.

My riding involves quite a bit or turns, often over painted lines on the pavement, and often when those lines are damp. I have felt my tires cut and grab at times, which tells me I'm pushing the limits a bit too close. I would rather not give up the margin of safety of riding on motorcycle tires for the economics of a car tire.

Title: Re: Tire goodrich 155/80-15
Post by bill67 on 01/29/09 at 16:00:19

Some day the tire companies will find out its better to have flat bottom tires on motorcycles instead of round,they been wrong for so many years now,almost 100 years.

Title: Re: Tire goodrich 155/80-15
Post by Oldfeller on 01/29/09 at 16:35:35

Those who have tried it know the answers to these questions.

Those that have not (and will not) ever try it raise objections and will not listen to those who can answer the objections that have been raised.

You don't lose wet traction when braking in any relatively upright position wearing the car tire. I don't generally brake hard when leaned way over when its raining, so I can't really speak to that scenario. (didn't do it on bike tires either).

I know I have better upright wet braking traction on the Savage with the car tire than I do on the XV535 wearing the bike tire. (fact, notice it every six months or so when I get caught out in the rain on the XV535) The bike tire on the XV535 seems better than the stock Savage IRC tire was on the Savage, but hey - that was a while ago for me and memory gets faint after what, nearly 2 years riding on the car tire now.

Each summer when we go on the mountain Dragon Run I let the guys all ride my bike and squall the rear tire some -- ask them what they think. This summer there will be a bunch of 'em, too. Maybe we'll do a braking contest this year (tire brand comparison against my 2+ year old cheap $34.95 chungfooie VW tire).

I have better dry braking traction on the Savage on dry clean pavement than I do on the XV535 with the bike tire. Car tire is noiser, but gives better, shorter stopping distances.

You got 5-6 people on the list riding a car tire on the back now every day, seems if someone had noticed handling issues wet or dry they would have said something by now.

And they have all remarked about the improvement in dry braking performance when they first put the car tire on. So far, comments have been favorable to the car tire.

=========

And please remember, nobody is holding a gun to your head. Teasing you some, yeah. You are due a little bit of teasing every time you drop that hundred plus dollars unnecessarily. (time after time after time)

But hey, it is all good humored teasing.

Hey, it's your money and its your butt -- please do with them what you feel is appropriate.

Can't get much more personal freedom-wise than that.