Results 1 to 8 of 8
  1. #1
    mtbr member
    Reputation: Slurry's Avatar
    Join Date
    Dec 2008
    Posts
    595

    Marathon Supreme 29x2.0 is tiny....

    My Schwalbe Marathon Supreme HS382 (29x 2.00") only measure to ~1.770 inches (outer width) on a 19mm internal width rim. What gives? I understand there can be some variance in listed sizes versus actual sizes, but that's a huge difference!

    I put one of them on my friends MTX33 29er rim (which i think is about 28mm internal width), and they were still well under 2 inches.

    I fired off an email to Schwalbe, but I don't exactly know what they would do about my problem. My experience with newer Schwalbe MTB tires had led me to believe that Schwalbe was often a bit over their listed size, even when just measuring the sidewalls (not knob-to-knob)


    And FWIW, they're still really nice tires, but I really wanted a 2" tire and the air volume to go with it.

  2. #2
    mtbr member
    Reputation: manmythlegend's Avatar
    Join Date
    May 2012
    Posts
    228

    Re: Marathon Supreme 29x2.0 is tiny....

    What problem are you having besides inaccuracies of stated size?

  3. #3
    mtbr member
    Reputation: Slurry's Avatar
    Join Date
    Dec 2008
    Posts
    595
    Quote Originally Posted by manmythlegend View Post
    What problem are you having besides inaccuracies of stated size?
    I bought a tire labeled 2" because I wanted a 2" tire. The tire is not even close to two inches.

    My reason for posting was to ask if anyone had an explanation, or similar experiences with this tire.

  4. #4
    Unhinged Aussie on a 29er
    Reputation: hunter006's Avatar
    Join Date
    Jan 2012
    Posts
    449
    That's no surprise. Surly mentioned this before with their blog that using a narrow rim like a 19mm rim tends to pull the mount points of the tire in, which in turn reduces the width of the tire. If you have a 19mm rim instead of a 26mm rim, you will get a different tire width. They made a big point of this when putting wider tires on the Krampus.

    Schwalbe keep their tire dimensions chart here. If you check out their tech page, it has this underneath it, which coupled with the statement above, tells you why it can be so much less than the 2" you're measuring:

    Why is it that tires are often actually narrower than the ETRTO tire section width?

    Standard tire widths are calculated using fairly wide, standard rims. Yet in practice, narrower rims are used more often, which in turn leads to tires becoming slightly narrower as well.

    In order to ensure that tires have sufficient frame clearance, tire
    manufacturers generally prefer to keep production closer to the lower end of the permitted tolerance (+/- 3 mm).

    Carcass casing materials have become more and more sophisticated over time, that reduces the tire widening after the fitting. In order to correct this tire widening, over the past few years slightly wider carcasses have been used, so that the actual widths are now much closer to the standard widths.


    FWIW, I notice the tire profile of Marathon Supreme's are a slightly narrower, taller tire than Big Apples, so I wasn't terribly surprised with it being slightly less than 2" on my bike - my 26mm rims measure it to be 1.92" wide, which is OK in my books.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Aug 2009
    Posts
    573
    I just installed a pair of 26x2 yesterday. 532 grms 1.77 on a 25mm OD rim. Smooth and quiet. How's the flat protection to anyone that has used the tire.

  6. #6
    Unhinged Aussie on a 29er
    Reputation: hunter006's Avatar
    Join Date
    Jan 2012
    Posts
    449
    I haven't had a flat since I switched to them over 4000 mi ago.

  7. #7
    mtbr member
    Reputation:
    Join Date
    Aug 2009
    Posts
    573
    Good to hear. Is that all pavement use?

  8. #8
    Unhinged Aussie on a 29er
    Reputation: hunter006's Avatar
    Join Date
    Jan 2012
    Posts
    449
    Mostly pavement but I'm creative with my selection of routes when getting around. For example, we currently have construction on NE Points Dr. Everyone else takes the gravel path, which means you're stuck with the pedestrians. On the odd occasion I go through there, I like to take the path with rocks around the size of your fist, because I get through it faster than the slow people. Then there's light trail gravel, etc. nothing super crazy that I frequently use because people here have trouble with the concept of safe passing on paved trails (the shoulders are light trail gravel with the occasional surprise).

    The pavement quality in Seattle is pretty low too... lots of broken pavement. I'm not gentle on the bike. They are pavement miles, but the pavement miles aren't great quality pavement.

    I also ride a lot on the street, and most of those streets are only swept occasionally.

Similar Threads

  1. Replies: 2
    Last Post: 02-07-2012, 09:41 AM
  2. 32C Marathon Supreme too small for an X470 rim ?
    By knutso in forum Wheels and Tires
    Replies: 4
    Last Post: 11-16-2011, 09:28 AM
  3. tiny tiny pinholes in tread UST
    By diskus in forum Wheels and Tires
    Replies: 3
    Last Post: 06-27-2011, 02:35 PM
  4. Geax Saguaro 29x2.2 vs Mountain King 29x2.4 ?
    By Clones123 in forum Wheels and Tires
    Replies: 14
    Last Post: 05-22-2011, 09:30 PM
  5. Replies: 3
    Last Post: 01-28-2011, 05:12 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •