How is a 26" x 2.125 different from a 700x23C?

[inspectorcritic]

Are they the same or is it 27" or 29"?

 

[FurryOnTheInside]

559mm+108mm=667mm diameter
622mm+46mm=668mm diameter
The difference in unweighted diameter is 1mm.

Due to the deeper tyre on the 559 rim the effective wheel diameter of the 559 is less than the 622.
559+(108*0.9)=656.2mm
622+(46*0.9)=663.4mm

 

[Darwin]

700c x 23c tire is a skinny ass tire. Even the 39/40cc tires I used to ride on were skinny compared to a 26 x 2.125. That 7mm difference in post above can't be right, plus the 700 wheel is way bigger than a 26in. The equivalent tire to a 700c is a 28in tire.
Function
In the U.S., 26-inch wheels with decimal widths, such as 1.75 inches, appear primarily on adult mountain bikes, with some comfort, hybrid and cruiser bikes also using this size. Other types of 26-inch wheels were used on older Schwinns, English roadsters and French bicycles. The 28-inch wheels that are 1 1/2 inches wide appear on English, Dutch, Chinese and Indian rod-brake roadsters, and may also be called F10, F25 or 700B. Tires measuring 28 x 1 5/8 x 1 1/4 inches are a Northern European designation for 700C tires. Some German companies designate 700C tires as 28-inch tires with decimal widths.

 

[The_Aleman]

Standard "26" bicycle wheels are actually 22 inches in diameter (ISO 559). Running 2" tires on em makes them around 26" diameter.

700c wheels are actually 24.5" in diameter (ISO 622). Skinny road tires can be smaller than 26", running 2"+ tires makes a 29er.

 

[Frogslayer]

Good stuff to know, I'm currently tire hunting myself. Same exact thing happened to the electric rear tire as well 2 days ago! I know the bikes are a few years old and cheap as hell but what are chances lol? 26 x 2.125 are what these Walmart specials are.

 

[Darwin]

Pffft, I'd get another 100mi out of that tire if it were me.

 

[FurryOnTheInside]

There are a lot of cracks around the tyre. Has it been exposed to temperature extremes?

 

[Frogslayer]

Yes been very hot and very cold. Got 2 used tires today off a old bike for free. I agree with Darwin go till she blows!

 

[The_Aleman]

There are a lot of cracks around the tyre. Has it been exposed to temperature extremes?

You know what causes tire cracks quicker than anything? It's not actually using the tire. Yeah, UV rays will crack tires, but tires that are broken-in and not actually being used will develop cracks quicker than a tire in regular use that sees a lot of direct sun.

 

[FurryOnTheInside]

You know what causes tire cracks quicker than anything? It's not actually using the tire.

Well, yeah. I think I do, but it isn't what you said. I think it's just the rubber dries out from the being stored in the hot and cold and dry air in a garage, warehouse, outside, or other unsuitable area.
I wouldn't be worried about the UV wavelengths specifically, so much as just the exposure to hot intense sunlight heating up the black rubber... followed by the cold nights outdoors, and repeating.
Tyres last really well unused in my living room (I don't ride enough anymore) where temperature is fairly constant and moderate and the relative humidity is usually around 60%. Comfy for me seems to be comfy for tyres.

I the cellar the tyres can grow some kind of mould/mildew. Sweaty grips are the worst. Even the power cords on my tools get a gross powdery growth on the flexible plastic insulation. Bleach gets rid of it from cables.
I use disinfectant on butyl rubber, but that can remove a little bit of the surface. It seems to soften the rubber. It can make a mess when the softened rubber rubs on the bath when I'm scrubbing tyres. Lots of skid marks that don't erase. It's a good thing I'm not married or I'd get in trouble a lot for leaving skid marks in the bathroom and everywhere.
I'm heading off topic now....