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Valkyrie Riders Cruiser Club > General > General Board > Tire sizes...
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hubcapsc
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Posts: 16802


upstate

South Carolina
« on: March 16, 2015, 05:21:54 AM »
The new Valkyrie front tire is a weird size (130/60R-19)... the only
available tires are OEM Dunlop and a bias-ply Dunlop that they
run on some Harleys.

There's a lot of choices in 120/70-19, including a good old Avon Cobra.

The first number is width, so 120 is about 1/4 inch more narrow than 130.

The second number is a kind of ratio, that difference is not so obvious to me.

If I got a 120/70-19 instead of a 130/60-19, would the difference be "meh",
or would it be "Holy Crap, I can't use this!"? I don't want to pay $150 for
a 2-inches-too-tall bicycle tire that I can't use, and I'd like more choices
than Dunflop...

The rear is more normal, they don't have Cobras in 180/55R-17 , but there's some nice
looking high performance tires in that size for sport/touring bikes.

-Mike
« Last Edit: March 16, 2015, 06:01:06 AM by hubcapsc » Logged
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Joe Hummer
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Arnold, MO


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« Reply #1 on: March 16, 2015, 05:37:50 AM »
Hey Hubcapsc...Not a tire expert but here is what I found...

Tire 1 - 130/60/19
Tire 2 - 120/70/19

Results
Sidewall Height
Tire 1 - 3.07
Tire 2 - 3.31
Diff - 0.24

Section Width
Tire 1 - 5.12
Tire 2 - 4.72
Diff - -0.4

Overall Diameter
Tire 1 - 25.14
Tire 2 - 25.61
Diff - 0.47

Circumference
Tire 1 - 78.99
Tire 2 - 80.47
Diff - 1.48

Revs per Mile
Tire 1 - 802.18
Tire 2 - 787.38
Diff - -14.8

Speedo reads 65mph
Actually speed 66.22mph

So...basically, your chosen tire is 1/4" taller and about 1/2" narrower.  Expected results should be a very little more nimble feel as you don't have a narrower tire up front.  Personally, if it meant having a more accessible tire, I would make the change. 

Joe
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1999 Valkyrie Interstate
You pay for the whole bike, why not use it Jerry Motorman Palladino
..
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Posts: 27796


Maggie Valley, NC
« Reply #2 on: March 16, 2015, 05:43:08 AM »
I've useed Shinkos for the past 50,000 miles but not this size or model
http://crankmoto.com/shinko-130-60-19-sr777-a-b-87-4606-moto/?gclid=CIPF-5DzrMQCFUoV7AodEWwATw

Sits back and waits for the flaming death Stinko comments  Evil laugh Evil
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hubcapsc
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Posts: 16802


upstate

South Carolina
« Reply #3 on: March 16, 2015, 05:50:15 AM »
Quote from: Britman on March 16, 2015, 05:43:08 AM
I've useed Shinkos for the past 50,000 miles but not this size or model
http://crankmoto.com/shinko-130-60-19-sr777-a-b-87-4606-moto/?gclid=CIPF-5DzrMQCFUoV7AodEWwATw

Sits back and waits for the flaming death Stinko comments  Evil laugh Evil


Hmmm... I didn't know about that one... I ride a little harder than you, but maybe
I'll give it  a try...  Roll Eyes

-Mike
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..
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Posts: 27796


Maggie Valley, NC
« Reply #4 on: March 16, 2015, 05:52:12 AM »
Quote from: hubcapsc on March 16, 2015, 05:50:15 AM
Quote from: Britman on March 16, 2015, 05:43:08 AM
I've useed Shinkos for the past 50,000 miles but not this size or model
http://crankmoto.com/shinko-130-60-19-sr777-a-b-87-4606-moto/?gclid=CIPF-5DzrMQCFUoV7AodEWwATw

Sits back and waits for the flaming death Stinko comments  Evil laugh Evil


Hmmm... I didn't know about that one... I ride a little harder than you, but maybe
I'll give it  a try...  Roll Eyes

-Mike


 cooldude Wink cooldude
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hubcapsc
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Posts: 16802


upstate

South Carolina
« Reply #5 on: March 16, 2015, 06:05:58 AM »
Quote from: JoeValkIS on March 16, 2015, 05:37:50 AM
Hey Hubcapsc...Not a tire expert but here is what I found...

Tire 1 - 130/60/19
Tire 2 - 120/70/19

Results
Sidewall Height
Tire 1 - 3.07
Tire 2 - 3.31
Diff - 0.24

Section Width
Tire 1 - 5.12
Tire 2 - 4.72
Diff - -0.4

Overall Diameter
Tire 1 - 25.14
Tire 2 - 25.61
Diff - 0.47

Circumference
Tire 1 - 78.99
Tire 2 - 80.47
Diff - 1.48

Revs per Mile
Tire 1 - 802.18
Tire 2 - 787.38
Diff - -14.8

Speedo reads 65mph
Actually speed 66.22mph

So...basically, your chosen tire is 1/4" taller and about 1/2" narrower.  Expected results should be a very little more nimble feel as you don't have a narrower tire up front.  Personally, if it meant having a more accessible tire, I would make the change. 

Joe

that's a pretty cool app... the 130 already seems pretty skinny, almost half an inch skinnier
might be more than I bargained for, maybe not... the 1/4 taller might not be too bad... the
app sez the speedo wouldn't be off that much, and if it spins around fewer times per mile, the
tire might last longer...

-Mike
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MarkT
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Colorado Front Range - elevation 2.005 km


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« Reply #6 on: March 16, 2015, 06:22:25 AM »
My GL1800 Gold Wing gets the speedo off the back - did they move it to the front on the new Valk?

Also - when I've gone to narrower tires in front, handling got more nimble.  However the bike also got harder to ride in loose dirt/sand/deep gravel.
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Jess from VA
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Posts: 30870


No VA
« Reply #7 on: March 16, 2015, 06:44:31 AM »
This might be helpful.
http://www.discounttire.com/dtcs/infoTireMath.dos

Looks like the Michelin Commander II also comes in the 120/70-19.  It's a good tire.

http://motorcycle.michelinman.com/tires/michelin-commander-ii

http://www.motorcycle-superstore.com/41865/i/michelin-commander-ii-cruiser-front-tire


 
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vanagon40
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Posts: 1472

Greenwood, IN
« Reply #8 on: March 16, 2015, 06:50:50 AM »
Quote from: Jess from VA on March 16, 2015, 06:44:31 AM
This might be helpful.
http://www.discounttire.com/dtcs/infoTireMath.dos

* * *


 


There is also a link to a Tire Comparison Program on the Shop Talk page.
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hubcapsc
Member
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Posts: 16802


upstate

South Carolina
« Reply #9 on: March 16, 2015, 08:53:35 AM »
Quote from: MarkT on March 16, 2015, 06:22:25 AM
My GL1800 Gold Wing gets the speedo off the back - did they move it to the front on the new Valk?

Also - when I've gone to narrower tires in front, handling got more nimble.  However the bike also got harder to ride in loose dirt/sand/deep gravel.

I don't know about the speedo, I was just assuming... they probably didn't change
it, I'll have to look...

"Nimble" is a good way to describe the difference between the old Valkyrie and
the new one, but I don't think the "solid" way the old Valkyrie goes through
turns is a bad thing. Getting squirrely in the sand or gravel might be bad though...

I wish Honda didn't put that weird tire on there... maybe the 120/70 will be an
option... or the Shinko... if Britman likes them they must not be all bad...

I've worn a big flat spot on the rear Dunlop already... less than 2000 miles on the
bike. I've been running 40 pounds, I wonder if I should run more?

-Mike
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KY,Dave (AKA Misunderstood)
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Posts: 4146


Specimen #30838 DS #0233

Williamsburg, KY
« Reply #10 on: March 16, 2015, 09:33:23 AM »
Quote from: hubcapsc on March 16, 2015, 08:53:35 AM
Quote from: MarkT on March 16, 2015, 06:22:25 AM
My GL1800 Gold Wing gets the speedo off the back - did they move it to the front on the new Valk?

Also - when I've gone to narrower tires in front, handling got more nimble.  However the bike also got harder to ride in loose dirt/sand/deep gravel.

I don't know about the speedo, I was just assuming... they probably didn't change
it, I'll have to look...

"Nimble" is a good way to describe the difference between the old Valkyrie and
the new one, but I don't think the "solid" way the old Valkyrie goes through
turns is a bad thing. Getting squirrely in the sand or gravel might be bad though...

I wish Honda didn't put that weird tire on there... maybe the 120/70 will be an
option... or the Shinko... if Britman likes them they must not be all bad...

I've worn a big flat spot on the rear Dunlop already... less than 2000 miles on the
bike. I've been running 40 pounds, I wonder if I should run more?

-Mike

Been happy with my shinko on the front as well Mike. Not that I ride like you do  Roll Eyes
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