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Discussion Starter · #1 ·
Does anyone know what exactly the difference is in the 15" rear rim that makes it not suitable for a car tire?
 

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Car Tire

TJ;

Several folks run car tires on the 15" rim. I was running a Dunlap SP Sport 8000 / P245-50 ZR15 until a recent surgery. Overall I preferred it to the 230 because it had a couple of extra advantages for me.

First, it's very good in the rain (real important here in Central Fl. LIKE RIGHT NOW DURING BIKE WEEK!). I'm comfortable cruising @ posted interstate speeds with it in all but a "Gulley Washing" downpour.

My clutch Boss is geared rather tall with a 38 / 80 Gates pulley setup, and the considerably smaller circumfrance of the Dunlap helped me not have to slip the clutch as much from a stop. My scoot also has 04 bodywork and fenders, and I did not have to trim the fender where it is indented for the belt guard. I have read that some of the wider tires require that.

LaMonster runs a less expensive car tire than my Dunlap and is very pleased with it. He SMOKES it frequently and it has served him a long time. You can see the "edging" effect in his tag photo on this site. For me (scrawney old fart) the edging was managable, but requires a bit of care at slow speeds and on irregular pavement and soft surfaces.

Grumpy also runs an auto tire, I believe on an 18" rim, and posted some excellent threads about what to expect riding an auto tire vs. 230 Avon tire.

Back up thru these sites and you will find posts from Boss riders with lots more experience than me both pro and con.

As soon as I recover completely from a surgery and regain leg strength, the Dunlap is going back on my Boss.

My 2 cents. Hope you find this helpful.

Ride Safe!

HAWK88
Jack Phillips
 

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Tommy,

I believe the 15" rim will adapt to the car tire, at least the Mirage style, not sure about the new spoke for '05.

A number of guys are running them. Only thing is finding a tire with the right aspect ratio and/or stiff enough side wall to manage wobble. Lamonte runs them, Loaf and Hawk.

Tim
 

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Discussion Starter · #5 ·
I was told the new 5 spoke wheels will not accept a car tire.... :? Any info on that?
 

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Hadn't heard that Tom. Probably a difference in the rim bead depth. Bummer if they don't.

Ahhh, go ahead and spread a little of that gold out and buy a couple 18" rims and tires for the girl :)

Tim
 

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Car Tire

Tom;

My wheels are apparently 02's. The Dunlap SP 8000 runs warm butter smooth compared to the 230. I have had the pressure in it down to 35 PSI and have experienced no "wobble" up to just past 6000 RPM. Not sure how fast that is, my Autometer is as fickle as my first wife!

Of course, I don't have the ENGINEs some of these guys do, nor 2nd gear.

Ride Safe!

HAWK88
Jack Phillips
 

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Tommy,

Just up snooping on the tire rack site, and there are dozen tires to fit 15" rims. Most 55 & 60 series tires in the 235 to 255 range will go on the stock 7" wide rim and you get some awsome face width wit low profile sidewalls. Diameter doesn't make much difference on the two speed and you can recalibrate your speedo.

You should call teh factory and check on that rim.

Tim
 

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Discussion Starter · #9 ·
The factory says the rim has a "motorcycle bead" whatever that is. But when I questioned them on it they really couldn`t tell me what the difference is. So I called around some and got told by some it was ok... Others said don`t do it. :? I was really just wanting to try it to see what I thought but if there is a chance it may fail I think I`ll have to stick with what I know is safe.
 

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Boy...That Pirelli P600 looks good to me. 235/60WR15. High speed rated with a great load capacity and nice tread. Anyone use it? Damn,,,I constantly revisit this issue because I love the look, wear and traction of a car tire but have stayed with the grooved Avon 230 for the round profile and cornering. Also want to stay with the 15" wheel and 60 aspect ratio because I don't like the looks of the larger diameter wheels with lower aspect ratio tires.
Never had wobble problems and stay in a quandry about whether or not to take the plunge and go for the car tire. Anyone with experience with this tire? Also this is only 5mm wider than the 230 avon so would I need to cut off the rear fender indent on the left side of my 2000?...Joe
 

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Tom,
a "motorcycle bead" is a larger bead than on a car rim. This way tire wont come off the rim when leaning into a curve. As far as I am informed you can put any cartire on a motorcyclerim, but you cant put a motorcycletire on a carrim.
Peter
 

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Joe,

I think if you try the car tire you'll be pleased after you get used to it. It took me a while to get really comfortable on mine, but last weekend when I got it out for the first time since last fall, it felt great again. That Pirelli does look hot 8) :lol:

As far as the fender goes, it was my experience that every tire, and every fender seems to be a bit different. I actuall had to trim mine twice after I got the car tire on, and I had already trimmed it for the 280 Metzler. If you have a dremel, it can be done without removing the wheel. Just jack the bike up on your PitBull and let the swing arm hang. Plenty of room to get in and trim it. Even on my yellow paint, you can't see the cut marks.

One big advantage of the 15" rim is that you can stay with the larger aspect ratio and not affect overall circumference. Another is that the relative price for car tires is low compared to event the Avons.

Tim
 

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Tim....when you say 'getting used to it", what exactly do you mean? Just seems to my naive mind that a round tire has to be superior in cornering to the car tire. The Boss is crap in the corners with the round 230 Avon tire and don't know what to expect with the Pirelli tire....Joe
 

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Joe,

The perfect explaination of this is to look at Lamonts photo of him in the turn. A car tire "edges" as you lean the bike over. Interesting though, the actual contact patch on a car tire with somewhat rounded shoulders, is that it has at least as large a contact patch as the 230. If you run through a little moisture then corner your Avon, you'll be amazed at how small the contact patch is.

What I noticed going from round to flat, was that initially, as you roll into a corner, you can fell the car tire 'come up on edge'....if you're in switchbacks, you can feel the edging from left to center to right, etc......

I have throttled mine up as hard as with my round tires in corners, and it has never felt like it was going to slide out.

Tim
 

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Edging

Joe;

The only things I can add to this is @ very slow speeds, "paddling" around gas pumps, in and out of garage, or sugar sand or gravel, a mismatched pavement seam or unseen stone, or whatever, puts a large, side moment on the scoot, and if unexpected takes a bit of getting used to as well. Course, I'm an anemic old fart with poor circulation in my legs also.

I had been gradually letting the pressure down in the tire, and was @ 35 PSI to help aleviate that phenomona. Every pound made a significant improvement. During the "RIDE" @ Daytona, there were a couple "seasond" Boss riders with 18" wheels and car tires. The one I was directly behind most of the time appeared to have very little "edging" effect.

On my scoot, @ 35 PSI, you can stick a boot toe under the R/H side of my tire when on the kickstand. This fellows Boss wasn't nearly so bad, and he said he was running 30 PSI. I'll try that when I roll the Dunlap back under my scoot.

Ride Safe!

HAWK88
JAck Phillips
 

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Car Tires

I am needing my third rear tire replacement and am considering a car tire. Have a stock '01 mirage wheel. I prefer not to have a taller tire. Any suggestions on size or brand?

Alan
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Tim...So I'm still not sure of the verdict in your mind nor Hawk's for that matter. Do you like the car tire or Avon better...discounting the better look of the car tire? The grooved Avon 230 works great for me but always have to try something different. Does the car tire get squirrely in the corners? What about rain and do you have any high speed wobble problems? ...Joe
 
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