Panaracer GravelKing SK 27,5" x 1,9" on 27"
01-09-20, 10:27 AM
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Panaracer GravelKing SK 27,5" x 1,9" on 27"
Haven't shopped new 27" tires for a long time. My Super Course with 27" concave weinmanns needs tires. Unfamiliar with the size: Panaracer Grave lKing SK 27,5" x 1,9" Knobby Tread Tire, Black & Brown Sidewall
Really like my 700c Gravel Kings on other bikes, Question is, can these mount on the 27" rims of my Super Course?
Really like my 700c Gravel Kings on other bikes, Question is, can these mount on the 27" rims of my Super Course?
01-09-20, 10:43 AM
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The 26"/27"/27.5"/28"/29" nomenclature is pretty obsolete, as it's supposed to refer to the OUTSIDE tire diameter. These days the ISO number (559/622/630) is the only one that you can depend on.
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01-09-20, 10:45 AM
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Aha, I’ve been wondering about that. I’ve been seeing 27.5 mentioned, a lot more recently, and have been curious, but didn’t want to ask, because I might sound like an idjit. 😁😉 I think I’ll stick with the more common sizes, until someone proves these oddball sizes have any real benefits. 🤔
01-09-20, 12:58 PM
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as others have said look for the ISO sizes, tires sizes can be confusing ISO helps compare apples to apples also for 27" tires check out the dedicated thread here
01-10-20, 12:55 AM
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Not sounding like a noobee
Aha, I’ve been wondering about that. I’ve been seeing 27.5 mentioned, a lot more recently, and have been curious, but didn’t want to ask, because I might sound like an idjit. 😁😉 I think I’ll stick with the more common sizes, until someone proves these oddball sizes have any real benefits. 🤔
For example: "I've been around bikes for a long time but I'm not familiar with this fill in the blank. Likelihood of getting an intelligent respectful answer are pretty good.
The old saying in school was, "The only stupid question was the one not asked"...
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01-10-20, 01:06 AM
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This!
My mountain biking buddies get really confused when I tell them that my 27" rims are larger than their "29er" rims.
Based on how arbitrary MTB rim/wheel size designations are its obvious that MTBers have all hit their head too many times ;-)
My mountain biking buddies get really confused when I tell them that my 27" rims are larger than their "29er" rims.
Based on how arbitrary MTB rim/wheel size designations are its obvious that MTBers have all hit their head too many times ;-)
Last edited by jackbombay; 01-10-20 at 01:12 AM.
01-10-20, 02:28 AM
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It's a good thing we have inaccurate inflated diameter proxy marketing gibberish to keep things simple. Imagine the chaos and confusion if wheels and tires were sold by something complicated like bead seat diameter!
27.5" refers to a bead seat diameter of 584mm. 27" refers to a larger bead seat diameter of 630mm. Similarly, 700c refers to a bead seat diameter of 622mm. The bead seat diameter of a rim and tire must match exactly for the combination to work correctly: even though 27" and 700c rims are only 8mm different, their tires are not interchangeable. Similarly, you cannot mount 27.5" tires on a 27" rim, because 27.5" rims are smaller than 27" rims.
Haven't shopped new 27" tires for a long time. My Super Course with 27" concave weinmanns needs tires. Unfamiliar with the size: Panaracer Grave lKing SK 27,5" x 1,9" Knobby Tread Tire, Black & Brown Sidewall
Really like my 700c Gravel Kings on other bikes, Question is, can these mount on the 27" rims of my Super Course?
Really like my 700c Gravel Kings on other bikes, Question is, can these mount on the 27" rims of my Super Course?
01-10-20, 07:17 AM
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The only reason they chose 27.5 was because it was in between the common 26 inch mountain bike size and the 29er size. 27.5 was supposed to be a compromise between too big and too small. Like most bike tire common size names, it didn't have anything to do with actual measurements.
01-10-20, 07:45 AM
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You need to be concerned about tire width as well. There is no way that 1.9 (50mm) tires will work on your Super Course. The widest I've been able to fit on my 1972 Super Course were 35mm, and they were very close to the chainstays. At present, I have Panaracer Pasela 27 x1 1/4 (32-630) on the bike. I like them a lot. The choices for 27" tires are not extensive.
01-10-20, 09:48 AM
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You need to be concerned about tire width as well. There is no way that 1.9 (50mm) tires will work on your Super Course. The widest I've been able to fit on my 1972 Super Course were 35mm, and they were very close to the chainstays. At present, I have Panaracer Pasela 27 x1 1/4 (32-630) on the bike. I like them a lot. The choices for 27" tires are not extensive.
01-10-20, 11:51 AM
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Thanks all, I know of ISO sizes, but see ads on CL and eBay that don't use them. Old enough to not worry about what people think. Was going to go with the Pasela Panaracers, but hoped there might be something fatter that would fit. Don
