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Glen,
I just got a new Avon and will give it another shot
Mike
 
I put a single rim protector on opposite the starting point (2nd bead, first is usually just push on)when using the tire changer. That way if the bar won't quite do that last little bit, the long tire spoon can flip it in, no rim damage.
Lots of heat, lots of tire lube.
Sounds like you already had the last two items.

Glen
 
FWIW I made a bead breaker for doing tire changes on newer bikes with tubeless tires, makes the job relatively easy. As was said tire lube is a must, I got a gallon of Ruglyde from Napa that will last for the rest of my riding days.

Available tires
 
bluto said:
100/90-19 tires usually spec WM3/2.15" rims and that one is no exception
(however I do realize that many run them on WM2/1-85" rims and live to tell the tale)
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Is a Road Runner or other tire 100/90-19 on a WM2 a safety problem, a handling problem, or a wear issue? I realize an 18” rim gives more tire choices if you don’t mind running an 18/19 combo. With all the comments being tossed around regarding rim sizes, its a bit confusing. “live to tell the tale” sounds ominous. Thanks.
 
jamesp said:
Is a Road Runner or other tire 100/90-19 on a WM2 a safety problem, a handling problem, or a wear issue? I realize an 18” rim gives more tire choices if you don’t mind running an 18/19 combo. With all the comments being tossed around regarding rim sizes, its a bit confusing. Thanks.
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It is simply not the optimal cross sectional tire profile when mounted. On a narrower rim, the profile is slightly taller and narrower than on a wider rim.
 
jamesp said:
Is a Road Runner or other tire 100/90-19 on a WM2 a safety problem, a handling problem, or a wear issue? I realize an 18” rim gives more tire choices if you don’t mind running an 18/19 combo. With all the comments being tossed around regarding rim sizes, its a bit confusing. “live to tell the tale” sounds ominous. Thanks.
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Sorry for sounding ominous, what I meant was only that many run 100/90 tires on WM2 rims. I'm not qualified to say whether this is a safety issue or not but the profile is visibly pinched and pointy.
 
bluto said:
Sorry for sounding ominous, what I meant was only that many run 100/90 tires on WM2 rims. I'm not qualified to say whether this is a safety issue or not but the profile is visibly pinched and pointy.
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Ok, thanks for responding. Pinched and pointy sounds like a good description for the outcome and easy to understand.
 
bluto said:
Sorry for sounding ominous, what I meant was only that many run 100/90 tires on WM2 rims. I'm not qualified to say whether this is a safety issue or not but the profile is visibly pinched and pointy.
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Really? I run that combo, and it doesn't look pinched and pointy to me.
 
jamesp said:
Ok, thanks for responding. Pinched and pointy sounds like a good description for the outcome and easy to understand.
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Like below, the photo is not great but you can see it near where the tire meets the ground. The tire would definitely have a better profile on a WM3 rim.

Available tires
 
First let me point out that at my age I doubt I can feel much difference in tyres unless I fall down. But the WM2 rims seem to me to be one reason tyres wear out so quickly: pointy profile. The centre is long gone before the side areas show any wear and I have come to doubt that this is entirely due to not pushing as hard as days of yore.
Another clue is I ran last a Avon TT100 clone claimed to be 4.10. This tyre no longer available but is noticeably narrower than the
Dunlop same alleged size. On the back of the Commando it looked ridiculous but it wore all across the tyre and lasted for the same mileage. I felt NO difference in handling.
So methinks the WM2 just ain't making it. No doubt several will say "No sh_t Sherlock we told you this YEARS ago".
I put a WM3 on the back we shall see how this season goes.
 
Onder said:
First let me point out that at my age I doubt I can feel much difference in tyres unless I fall down. But the WM2 rims seem to me to be one reason tyres wear out so quickly: pointy profile. The centre is long gone before the side areas show any wear and I have come to doubt that this is entirely due to not pushing as hard as days of yore.
Another clue is I ran last a Avon TT100 clone claimed to be 4.10. This tyre no longer available but is noticeably narrower than the
Dunlop same alleged size. On the back of the Commando it looked ridiculous but it wore all across the tyre and lasted for the same mileage. I felt NO difference in handling.
So methinks the WM2 just ain't making it. No doubt several will say "No sh_t Sherlock we told you this YEARS ago".
I put a WM3 on the back we shall see how this season goes.
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That’s a good hypothesis. A reduced contact patch should result in a greater wear rate.

But don’t forget that the 19” tyre is a universal tyre. That means that they have MORE tread depth than a dedicated front tyre normally has… and approx 1/3 LESS than a dedicated rear tyre normally has. People on here have got their knickers in a twist about this before, but a quick check of Avons web site will reveal all.

So (and I’m not disputing your hypothesis, I am merely adding to it), even before we talk about compound type and rim size effect, you’ve already lost a third of your mileage before you start, if comparing to a dedicated rear tyre.

Running the same universal tyre front and rear, will make the rear wear look even worse (rear lasts less than normal… front lasts more than normal), due to the tread depth situation mentioned above.

NONE of this means you shouldn‘t use this combo, it works well, and is Avons recommendation, you should just be aware of the comparatively shorter rear tyre life.
 
Yaz yaz. It is the 19" part of the stock WM2 that bites really. You rarely can get a dedicated rear 19". The 400-18 Speedmassa I just took off my Interceptor has 5k on it and it leans against the garage wall smirking at me because it has a lot of tread left.
In fact are there ANY dedicated 19" rears for our old steeds anymore?
 
I have a WM3 x 19" rim on the rear of my 750, & the RR 100/90/19 wears out just as fast as on a WM2 rim. This is why I went to an 18" rear on the 920. You'll be luck to get 2,000 miles out of the universal tyre on the rear of a hard ridden Commando.
 
worntorn said:
I put a single rim protector on opposite the starting point (2nd bead, first is usually just push on)when using the tire changer. That way if the bar won't quite do that last little bit, the long tire spoon can flip it in, no rim damage.
Lots of heat, lots of tire lube.
Sounds like you already had the last two items.

Glen
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Glen,
When you say lots of heat,are you using a heat gun also? I have been just setting the tire over a heat duct in the house for a day.
Mike
 
I've been putting them out in the hot spring/ summer sun for a couple of hours or next to the wood stove in winter.
Glen
 
jseng1 said:
With Avon and Bridgstone drying up I found a decent economical tire that is available. Its a copy of a Bridgstone spitfire tread.

Shinko 10 SR 712F rear - 110/90 - 19 - 62H with 130MPH speed rating

Available tires
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Is that on a WM2 rim? Thanks.
 
I heard that Avon was taken over by Dunlop, but i didnt hear anything about discontinuing the AM26 so far. The AM 26 100/90-19 rear is still listed on the german Avon site. Got a new one in January.
 
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