Tire size standards?
01-18-15 | 07:46 AM
#1
Thread Starter
Senior Member
Joined: Apr 2014
Posts: 193
Likes: 0
Bikes: Giant Cypress DX
Tire size standards?
Looking for 700 38c tires. This ebay listing is for Michelin Protek 700 x38 tires but in the listing it states
ISO Width 35
Labeled Size 35
Michelin Protek 700x38 Black | eBay
Why does it say labeled size 35 if they're supposed to be 38c tires? Wondering if the listing is mislabeled or there's something about tire sizing I'm not clear on.
Thanks for all input.
ISO Width 35
Labeled Size 35
Michelin Protek 700x38 Black | eBay
Why does it say labeled size 35 if they're supposed to be 38c tires? Wondering if the listing is mislabeled or there's something about tire sizing I'm not clear on.
Thanks for all input.
01-18-15 | 09:22 AM
#3
Senior Member
Joined: Feb 2004
Posts: 30,225
Likes: 649
From: St Peters, Missouri
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Wouldn't blip my radar.
I suspect that Michelin is selling them as 35mm tires. In the real world, bicycle tires will seldom measure exactly the label width when mounted on a rim and inflated. In fact, the particular rim that you are using will affect the measured width of the tire. If it was my bike I'd pop them on and ride. You'll never notice a 3mm difference.
I suspect that Michelin is selling them as 35mm tires. In the real world, bicycle tires will seldom measure exactly the label width when mounted on a rim and inflated. In fact, the particular rim that you are using will affect the measured width of the tire. If it was my bike I'd pop them on and ride. You'll never notice a 3mm difference.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
01-18-15 | 10:17 AM
#5
aka Phil Jungels
Joined: Apr 2005
Posts: 8,234
Likes: 91
From: North Aurora, IL
Bikes: 08 Specialized Crosstrail Sport, 05 Sirrus Comp
Wouldn't blip my radar.
I suspect that Michelin is selling them as 35mm tires. In the real world, bicycle tires will seldom measure exactly the label width when mounted on a rim and inflated. In fact, the particular rim that you are using will affect the measured width of the tire. If it was my bike I'd pop them on and ride. You'll never notice a 3mm difference.
I suspect that Michelin is selling them as 35mm tires. In the real world, bicycle tires will seldom measure exactly the label width when mounted on a rim and inflated. In fact, the particular rim that you are using will affect the measured width of the tire. If it was my bike I'd pop them on and ride. You'll never notice a 3mm difference.
01-18-15 | 11:07 AM
#6
Banned
Joined: Jun 2010
Posts: 43,586
Likes: 1,380
From: NW,Oregon Coast
Bikes: 8
ETRTO set the agreed upon standards for the Bead Seat Diameter so Tire and Rims Fit each other .. 622 is that Number for 700c ..
second number is the tire - Width.. ala 622 - 32.. [35, 37, etc]
second number is the tire - Width.. ala 622 - 32.. [35, 37, etc]
Last edited by fietsbob; 01-18-15 at 11:12 AM.
01-18-15 | 11:18 AM
#7
Senior Member
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Why are you getting worked up over an ebay listing that is most likely a typo?
Michelin offers that tire in a variety of widths, including 35, 38 and 40mm. The ebay listing is mixing two tires, and either the title or the details are wrong.
FWIW the so-called ISO width is simply matter of nomenclature, ie. a 700x 38c tire would be the same as an ISO (ERTRO) 38-622. So the nominal ISO width which is molded into the tire will match the width that might appear on a label. However, there will be variance between nominal width and actual width for a variety of reasons, one being the rim' actual width.
Michelin offers that tire in a variety of widths, including 35, 38 and 40mm. The ebay listing is mixing two tires, and either the title or the details are wrong.
FWIW the so-called ISO width is simply matter of nomenclature, ie. a 700x 38c tire would be the same as an ISO (ERTRO) 38-622. So the nominal ISO width which is molded into the tire will match the width that might appear on a label. However, there will be variance between nominal width and actual width for a variety of reasons, one being the rim' actual width.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
01-18-15 | 12:29 PM
#8
Senior Member
Joined: Aug 2011
Posts: 22,676
Likes: 2,642
From: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)
Looking for 700 38c tires. This ebay listing is for Michelin Protek 700 x38 tires but in the listing it states
ISO Width 35
Labeled Size 35
Michelin Protek 700x38 Black | eBay
Why does it say labeled size 35 if they're supposed to be 38c tires? Wondering if the listing is mislabeled or there's something about tire sizing I'm not clear on.
Thanks for all input.
ISO Width 35
Labeled Size 35
Michelin Protek 700x38 Black | eBay
Why does it say labeled size 35 if they're supposed to be 38c tires? Wondering if the listing is mislabeled or there's something about tire sizing I'm not clear on.
Thanks for all input.
You aren't likely to notice an actual difference in riding between a 35mm and 38mm tire, so I would just buy something that fits and not let it bother you.
01-18-15 | 12:40 PM
#10
Senior Member
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
But it's fun to read the fanciful theories.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
01-18-15 | 09:35 PM
#12
Thread Starter
Senior Member
Joined: Apr 2014
Posts: 193
Likes: 0
Bikes: Giant Cypress DX
Why are you getting worked up over a question?
