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  1. #1
    vol
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    700x35c=700cx35?

    Are these two wheel sizes the same or not?

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    Senior Member BCRider's Avatar
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    700c is the name given to the tire size most commonly used for road bikes. I don't know if 35c is a valid descriptor or not.
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    vol
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    My wheels spec is "700x35c". Here is one such.
    Last edited by vol; 09-17-10 at 06:21 PM.

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    I don't think I have ever seen 700C X 35. The size is called 700C (means rim has 622mm bead seat diameter(BSD)) but is usually combined with the tire width to give 700 X xxC, like 700 X 35C (as far as I can recall, anyway)

    Regardless - if the tire say '700' somewhere on it, it will fit your 700C rim. Check other places and you will see the ISO BSD measurement of 622.

    Edit: From a Bontrager/Trek bike spec sheet: "Tires Bontrager CXO, 700x34c"

    From Specialized Cirrus spec sheet:
    "FRONT TIRE Specialized All Condition Armadillo Elite, 700x23c"

    And from Kona 'Jake the Snake' bike spec sheet:
    "Front Tire Maxxis Mud Wrestler 700x35C Kevlar Rear Tire Maxxis Mud Wrestler 700x35C Kevlar"
    Last edited by LarDasse74; 09-17-10 at 06:23 PM.

  5. #5
    rebmeM roineS JanMM's Avatar
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    The wheel size is 700C in the French system. http://www.sheldonbrown.com/tire-sizing.html
    That would be 700C x 35.
    700 x 35C would be a typo or error.
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    Quote Originally Posted by JanMM View Post
    The wheel size is 700C in the French system. http://www.sheldonbrown.com/tire-sizing.html
    That would be 700C x 35.
    700 x 35C would be a typo or error.
    Here is a page from Harris Cyclery - the host for Sheldonbrown.com

    http://sheldonbrown.com/harris/tires/622.html

    All 700C tires on the Harris Cyclery website are given as 700 X xxC, not one instance of 700C X xx.
    It may be confusing, and I am not saying it is right, but that is the normal way it is written. Luckily, any bike shop, when asked for a "700C X 35" or "700 X 35" or "700 X 35C" will probably know what you mean. If they don't... find another bike shop.

    Edit: From the Sheldon Brown page linked above...
    "For example, a 700 x 20 C road tire would be a 20-622; a 700 x 38 hybrid tire would be a 38-622."

    He uses with the 'C' after the width and with no 'C' at all.

  7. #7
    rebmeM roineS JanMM's Avatar
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    Quote Originally Posted by LarDasse74 View Post
    Here is a page from Harris Cyclery - the host for Sheldonbrown.com

    http://sheldonbrown.com/harris/tires/622.html

    All 700C tires on the Harris Cyclery website are given as 700 X xxC, not one instance of 700C X xx.
    It may be confusing, and I am not saying it is right, but that is the normal way it is written. Luckily, any bike shop, when asked for a "700C X 35" or "700 X 35" or "700 X 35C" will probably know what you mean. If they don't... find another bike shop.

    Edit: From the Sheldon Brown page linked above...
    "For example, a 700 x 20 C road tire would be a 20-622; a 700 x 38 hybrid tire would be a 38-622."

    He uses with the 'C' after the width and with no 'C' at all.
    OK. I see. What a mess bike tire nomenclature is. I resolve to never again say or write 700 or 700c and will forever use 622. Ha!

    And, further, I will only ride on 559 wheels, which I do. Until I get a bike with 700c, I mean 700 wheels.
    Last edited by JanMM; 09-17-10 at 07:08 PM.
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    Quote Originally Posted by JanMM View Post
    OK. I see. What a mess bike tire nomenclature is. I resolve to never again say or write 700 or 700c and will forever use 622. Ha!

    And, further, I will only ride on 559 wheels, which I do. Until I get a bike with 700c, I mean 700 wheels.
    700 wheels! That is not a bicycle - it is a septcenti-cycle!

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    vol
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    So looks like there is no different animal... As long as no possible confusion, that's good.

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    700C is the original size for the 622 rim. The 700 A&B is no longer in use as far as I know.

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    Senior Member oldbobcat's Avatar
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    For nit-pickers the correct nomenclature is 700C X 35, which means 622 mm rim flange diameter by 35 mm tire diameter. Chances are, this is what any combination of the fragments "700," "C", "X," and "35" signify.

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    Quote Originally Posted by oldbobcat View Post
    ...the correct nomenclature is 700C X 35...
    Thank you for the 'correction.' I have been using it wrong since I was a child, then for 15 years working in bike shops.

    I guess I will have to send corrections to the people maintaining the following websites, as they all use it wrong too...

    www.sheldonbrown.com
    www.specialized.com
    www.conti-online.com (continental tires)
    www.maxxis.com (maxxis tires)
    www.kenda.com.tw (kenda tires)
    www.pricepoint.com
    www.cannondale.com
    www.schwinnbike.com
    www.jamisbikes.com
    http://www.panaracer.com/ (panaracer tires)
    www.vittoria.com (vittoria tires)...



    I could go on, but I shudder to think how many people I will have to notify of this ongoing error. They are all going to be so embarrased when I tell them some random guy on the internet says they are labelling and selling their tires wrong.

    Thank you, sir. Thank you. Thank you. And again, I thank you.

  13. #13
    vol
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    Quote Originally Posted by oldbobcat View Post
    For nit-pickers the correct nomenclature is 700C X 35, which means 622 mm rim flange diameter by 35 mm tire diameter.
    Did you mean to say "35 mm tire width"? (tire or rim, by the way?)

  14. #14
    Old fart JohnDThompson's Avatar
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    Use the ISO (ETRTO) sizing standard and say goodbye to the confusion. A 700 x 35C or 700C x 35 would both be designated as 35-622 under the ETRTO system.

    Most, if not all, modern tires should have ETRTO size markings on them.

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    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Quote Originally Posted by davidad View Post
    700C is the original size for the 622 rim. The 700 A&B is no longer in use as far as I know.
    The letters used to denote rim width in the French system and now 700c describes all 622 mm rims.

    Friend snagged a Dawes Kingpin folder here today and it is fitted with 500A rims which are 440 mm... if anyone knows where to find tyres in the size I would be happy to know this.

    Barring that it is looking like we will rebuild his wheels to the more common 451 size.

  16. #16
    coprolite fietsbob's Avatar
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    35C is a pretty hot day..

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    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Quote Originally Posted by fietsbob View Post
    35C is a pretty hot day..
    I don't think we ever got that warm here this summer... it has been a cool and wet season here that feels more like the PNW than Alberta.

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    Quote Originally Posted by oldbobcat View Post
    For nit-pickers the correct nomenclature is 700C X 35, which means 622 mm rim flange diameter by 35 mm tire diameter. Chances are, this is what any combination of the fragments "700," "C", "X," and "35" signify.
    I know this thread is old, but since I found while looking for information on google, I want to make an update:
    It appears that the designation 700 x 35 C (with the space before the C) is meant to differentiate between other possible 700 x 35 sizes. Your tire size is probably 622mm x 37mm, designated by 37-622 in the ISO standard.

    One other interesting point, I have the same tires on my bike, and the rims are (I believe since there is no writing on them) 622x21C (without spaces). Here the 21 is the nominal width of the rim (not the tire), and the C means that it is a "Crochet" or hook type for keeping the tire bead in place. The hook type is the most common these days.

  19. #19
    7-speed doomsday prepper ThermionicScott's Avatar
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    Quote Originally Posted by giordano22 View Post
    I know this thread is old, but since I found while looking for information on google, I want to make an update:
    It appears that the designation 700 x 35 C (with the space before the C) is meant to differentiate between other possible 700 x 35 sizes. Your tire size is probably 622mm x 37mm, designated by 37-622 in the ISO standard.

    One other interesting point, I have the same tires on my bike, and the rims are (I believe since there is no writing on them) 622x21C (without spaces). Here the 21 is the nominal width of the rim (not the tire), and the C means that it is a "Crochet" or hook type for keeping the tire bead in place. The hook type is the most common these days.
    Welcome to BikeForums, but none of this is correct. The convention has always been to put the letter after the tire width (700x28C instead of 700Cx28), and the "C" has absolutely nothing to do with hook-type rims. There were also 700A, 700B, and 700D wheel sizes.
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  20. #20
    aka Tom Reingold noglider's Avatar
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    A great many people don't understand this nomenclature, which is not surprising, considering how convoluted it is. People seem to think that 'c' is a unit of measurement, so it is very common for manufacturers to say 700x35c. 700c is a wheel diameter, and it's different from 700a and 700b, which is also confusing, because those sizes don't exist any more. (Oh shut up about 700a, will ya?) Some people even say "cc" as if it's cubic centimeters or something. The 'c' is not a unit of measurement! You don't have fewer or more C's than someone else!

    So 700x35c means 700c diameter wheel with a 35mm wide tire.
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    I believe we're in complete agreement on what 700x35c means - the "C" is to differentiate from 700, 700a and 700b, which I understand are older standards. Also, putting the C behind the 35 instead of the 700 is weird, but hey it's become a standard. I'm glad you both agree on all this, because I didn't see that in the thread.
    my second comment was a bit off topic, but an interesting note on how the C in rim sizes is different than the c in tyre sizes as it does stand for something. Rim sizes are not tyre sizes, and ISO 5775-2 specifies that a trailing C in rim designations means hook type. That discussion could, of course, further confuse the topic at hand.

  22. #22
    aka Tom Reingold noglider's Avatar
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    Oy.
    Please email me rather than sending me a private message. My address is noglider@pobox.com

    Tom Reingold
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  23. #23
    7-speed doomsday prepper ThermionicScott's Avatar
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    Quote Originally Posted by giordano22 View Post
    Also, putting the C behind the 35 instead of the 700 is weird, but hey it's become a standard.
    Always was the standard, as far as I know.

    my second comment was a bit off topic, but an interesting note on how the C in rim sizes is different than the c in tyre sizes as it does stand for something. Rim sizes are not tyre sizes, and ISO 5775-2 specifies that a trailing C in rim designations means hook type. That discussion could, of course, further confuse the topic at hand.
    Ya think?

    I'll grant that the ISO standard allows for that "C" to differentiate a hooked-bead rim (just looked it up for myself), but it's superfluous to this zombie thread, and in general since the need to differentiate hooked versus straight-sided rims is mostly gone.
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  24. #24
    we be rollin' hybridbkrdr's Avatar
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    If you take a look at this XXcycle - Michelin Protek Cross Max Tire 28' - 42/622 (W) - en
    or this Bike24 - Michelin Protek Cross Max 28 inch Wired Tire
    which is the Michelin Protek Cross Max, they give it as size 42 – 622 (28 x 1,5) - 700 x 40 c on one site and 42-622 (700x40C) on the other site. So I have no idea whether this is 40mm wide or 42mm wide.
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