Paul, Any Cyclocross racer that raced as Scott said "back in Sheldon's day" ran tires marked as 35mm but measured 32mm on Open Pro rims. That was a standard CX racing setup. I still run the same setup on my classic steel CX bike.
I did try running Pasela 35s on Open Pros and they were OK as long as I had about 70-75 lbs in the rear. Otherwise I would feel the rear squirm around on fast curves. For some reason (traction?) the squirm is more apparent on pavement. The tire didn't mind, but I found it a bit disconcerting! Cheers, Bill in Roswell, GA On Tuesday, November 29, 2016 at 12:14:57 PM UTC-5, Paul Clifton wrote: > > Thanks for the clarification y'all. Seems like, as is the case with most > bike things, a few mm doesn't make much difference. > > Sheldon hasn't steered my wrong yet, but I do try to find a second source > usually. Here's another, slightly less conservative chart from > http://www.slowtwitch.com/Tech/Implications_of_Rim_Width_2803.html > > It still puts the 15c Open Pro way down on the skinny end and pretty much > backs up Sheldon's chart. What's noteworthy to me is that 17c and wider > will match well with any tire that I've every had a bike for. I do wonder > why the 17c to 21c seem to match with a broader set of sizes, but as long > as my wheels stay on the rim and the bike rolls and turns normally, I'm > fine. > > It's also noteworthy that the article is focused on how skinny you can get > your tires. Different strokes I guess. > > > > Paul in ATL > > On Tuesday, November 29, 2016 at 11:52:03 AM UTC-5, Patrick Moore wrote: >> >> It's not? >> >> Which tyre fits safely on which rim? >> [all dimensions in millimeters] >> Tyre width >> Rim width >> (interior)1820232528323537404447505457 >> 13 X X X X >> 15 X X X X >> 17 X X X X X >> 19 X X X X X X >> 21 X X X X X X >> 23 X X X X >> 25 X X X X X >> Note: This chart may err a bit on the side of caution. Many cyclists >> exceed the recommended widths with no problem. >> >> [image: Spoke divider] >> >> On Tue, Nov 29, 2016 at 9:37 AM, Scott Henry <ske...@gmail.com> wrote: >> >>> Please remember the source for your info. >>> Sheldon died almost a decade ago. Much has changed since then, if you >>> are looking for any current info, that's not the place to look. >>> >>> Back in his day, 35's were huge tires. >>> >>> On Tue, Nov 29, 2016 at 9:24 AM, Paul Clifton <paulgc...@gmail.com> >>> wrote: >>> >>>> Well, now I'm confused a bit. >>>> >>>> How much wiggle room do rims have on the max tire size, or does it >>>> depend on the rim shape? >>>> >>>> Have any wide tires ever popped off any narrow rims? >>>> >>>> I've been wheel shopping. I want to use mostly 38mm tires. The Open Pro >>>> is 15mm wide on the inside and is rated for up to 28mm tires ( >>>> https://shop.mavic.com/en-us/open-pro-c-j24200.html). Sheldon Brown >>>> has a table that puts 19mm wide rims in my sweet spot: >>>> www.sheldonbrown.com/tire-sizing.html#width >>>> >>>> It's been tricky to find a budget wheelset with both a 19mm or wider >>>> rim and a 130mm rear hub. So far the only reasonable option I've found >>>> uses >>>> a Velocity Dyad ( >>>> http://harriscyclery.net/product/velocity-700c-dyad-rs400-tiagra-wheel-set-36-spoke-3247.htm >>>> ). >>>> >>>> But I have a lot more options if a 40mm tire works well on a 15mm wide >>>> rim. So what gives? >>>> >>>> Also, anyone have any wheels for sale with medium-wide rims and 130mm >>>> rear hub? >>>> >>>> On Tuesday, November 29, 2016 at 8:24:28 AM UTC-5, Skenry wrote: >>>>> >>>>> You are good to upsize on those rims, look at a mountainbike >>>>> someday. Tires can easily triple the rim width. >>>>> >>>>> As for tire, I actually recommend these from Pmart >>>>> >>>>> http://www.performancebike.com/webapp/wcs/stores/servlet/Product_10052_10551_1168230_-1_400904__400904 >>>>> >>>>> Cheap as all get out, not too heavy and they perform really well. >>>>> They are my go-to tire for non racing cross bikes anymore. Did I >>>>> mention >>>>> cheap? >>>>> Scott >>>>> >>>>> >>>>> On Tue, Nov 29, 2016 at 7:05 AM, 'Mark Etze' via RBW Owners Bunch < >>>>> rbw-owne...@googlegroups.com> wrote: >>>>> >>>>>> I have that exact set up, Mavic Open Pro's with 40mm Clement MSO's. I >>>>>> run them at 60psi and they have been great with out any squirliness at >>>>>> all >>>>>> and no flats with 1500 miles on them. >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "RBW Owners Bunch" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to rbw-owners-bun...@googlegroups.com. >>>>>> To post to this group, send email to rbw-owne...@googlegroups.com. >>>>>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "RBW Owners Bunch" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to rbw-owners-bun...@googlegroups.com. >>>> To post to this group, send email to rbw-owne...@googlegroups.com. >>>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "RBW Owners Bunch" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to rbw-owners-bun...@googlegroups.com. >>> To post to this group, send email to rbw-owne...@googlegroups.com. >>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Resumes, LinkedIn profiles, bios, and letters that get interviews. >> By-the-hour resume and LinkedIn coaching. >> Other professional writing services. >> http://www.resumespecialties.com/ >> www.linkedin.com/in/patrickmooreresumespec/ >> Patrick Moore >> Alburquerque, Nouvelle Mexique, Vereinigte Staaten >> ************************************* >> *************************************************** >> *The point which is the pivot of the norm is the motionless center of a >> circumference on the contours of which all conditions, distinctions, and >> individualities revolve. *Chuang Tzu >> >> *Stat crux dum volvitur orbis.* *(The cross stands motionless while the >> world revolves.) *Carthusian motto >> >> *It is *we *who change; *He* remains the same.* Eckhart >> >> *Kinei hos eromenon.* (*It moves [all things] as the beloved.) *Aristotle >> >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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