I have an unlabeled damaged front wheel that currently mounts a 37-622 tire. The rim internal width is 19mm. I have done an awful lot of reading about wheel size and I am confused when I try to find wheels online to fit it. As far as I understand a rim should be marked with the min-max tire size it accepts, e.g. 700x25-38c. But that doesn't seem to be the case, as most rims I've seen are marked with only 1 size. What is that size? Or, just put it in simple words for my specific problem, what is the designation for a 700c rim with an internal rim width of 19mm?

Thanks!

700c rims have a 622mm bead diameter. The "700c" is not an actual engineering measurement. It's merely a class of wheels who share a 622mm bead diameter and who's tires generally fall within the gross diameter of 700mm.

Borrowed from wikipedia:

"Sizes[edit]

Bicycle rims and tires came in many different types and sizes before efforts were made to standardize and improve wheel/tire compatibility. The International Organization for Standardization (ISO) and the European Tyre and Rim Technical Organisation (ETRTO) define a modern, unambiguous system of sizing designations and measurement procedures for different types of tires and rims in international standard ISO 5775. For example:

• For wired-edge tires the ISO designation lists the width of the inflated tire and the diameter with which the tire sits on the rim, both in millimeters and separated by a hyphen: 37-622

• For rims the ISO designation lists the rim diameter (where the tire sits) and the rim's inner width, both in millimeters and separated by a cross, along with a letter code for the rim type (e.g., "C" = Crochet-type): 622x19C

In practice, most tires (and inner tubes) sold today carry apart from the modern ISO 5775-1 designation also some historic size markings, for which no officially maintained definition currently exists, but which are still widely used:

• an old French tire designation that was based on the approximate outer diameter of the inflated tire in millimeters: 700×35 C.
• an old British inch-based designation: 597 mm (26 × 1¼), 590 mm (26 × 1⅜, which is the most common), 630 mm (27 × 1¼), and 635 mm (28 × 1½)

Which designation is most popular varies with region and type of bicycle. For a comprehensive equivalence table between old and new markings, see the ISO 5775 article, the table in Annex A of the ISO 5772 standard, as well as Tire Sizing by Sheldon Brown.
Most road and racing bicycles today use 622 mm diameter (700C) rims, though 650C rims are popular with smaller riders and triathletes. The 650C size has the ISO diameter size of 571 mm. Size 650B is 584 mm and 650A is 590 mm. 650B is being promoted as a 'best of both worlds' size for mountain biking.[SUP][36][/SUP] Most adult mountain bikes use “26 inch” wheels. Smaller youth mountain bikes use 24 inch wheels. The larger 700C (29 inch) wheels have enjoyed some recent popularity amongst off-road bicycle manufacturers. The formerly popular (27 inch) wheel size is now rare. These rims are slightly larger in diameter than 700C wheels and are non-compatible with bicycle frames and tires designed for the 700C standard.
Children's bicycles are commonly sized primarily based on wheel diameter rather than seat tube length (along the rider's inseam) dimension. Thus, a wide range of small bike wheels are still found, ranging from 239 mm (12 inches) diameter to 400 mm (18 inches).
Wheel rims also come in a variety of widths to provide optimum performance for different uses. High performance road racing rims are narrow, 18 mm or so. Wider touring or durable off-road tires require rims of 24 mm wide or more.[SUP][37]"

[/SUP]
To the best of my knowledge there is no standard min/max with regard to tires for a specific internal rim width. If you were to look out in my garage you would find tires as wide as 57mm still mounted to a 19mm rim. But, at only 3.5bar vs my 25mm tire which are also mounted to a 19mm wide rim but inflated to 8 bar.

IME, i have found that tires are made to fit a specific Bead Seat Diameter (BSD), usually measured in millimeters. common BSD's are 559mm (aka MTB), 571mm (aka Road 26" or 650c), 622mm (road bike tire, 29er, 700c) and 630mm (old school 27").

the internal or external width of the rim is only of concern as regards ride quality and in extreme cases safety. as in a tire that is 2 inches wide when inflated, let's say, is mounted on a rim with the proper BSD for the tire but a 13mm internal rim width. the handling, especially when cornering, would be at best "squirrely". and could theoretically come off the rim (although i have never had this happen to me or seen or directly heard a story from someone who has had this occur to them.

Go to https://www.sheldonbrown.com

In the wheel and tires categories will be chart for sizing tires per inner rim width.

=8-)

The outside width is "about" 5mm wider than inside.

IF you want to use skinnier tires, you might consider a bit narrower rim. Saving a few ounces might be desirable.

Are you looking at the cheapest available wheel, something a step or 2 above the bottom feeders, are super $trong, expensive......?
What type of riding do you do?

So I did quite a bit of reading, as I was saying. According to Sheldon Brown:

A general guideline is that the tire width should be between 1.45/2.0 x the inner rim width.

If you flatten out a tire and measure the total width from bead to bead, it should be approximately 2.5 x the ISO width.

If your tire is too narrow for the rim there's an increased risk of tire/rim damage from road hazards.

If its too wide for the rim, there's an increase risk of sidewall wear from brake shoes, and a greater risk of loss of control in the event of a sudden flat.


In the same article, he says the guideline is fairly conservative. Therefore, if I have a 37mm-wide tire, I should be comfortable with internal rim widths in the 19-25mm range. As I was saying, the current rim is 19mm.

Now, when I go looking for such a rim I might find a 622x19c designation (I haven't really seen this) or 700x35c (legacy system). Is that correct?

What you should be looking for is "ETRTO 19-622" or something close to 19.

As noted rims are marked for diameter (622 or 700c) but not always for actual width, though you can look that up on the makers' sites. If you want to know the tire fit range, go to sites like Sheldon Brown / tire sizing, or some tire makers and sellers also have guides to width fit range.

When referencing guides, keep in mind that most compare rim inside width to tire overall width. Also be aware that tire width dimensions are very approximate, and it isn't rare for one brand's 25mm tire to be wider than another's 28mm.

You can easily run nearly any rim width with a 37mm tire. Unless you get into super wide "29er" rims or the narrowest road rims ever made, you'll be fine.

Just make sure it's 700c/622 ETRTO.

The answer:

https://www.schwalbetires.com/tech_in...dimensions#rim

6 posts up...site has similar chart.

=8-)

Take those numbers with a very large grain of salt. I run 2.125" (53mm) mountain bike tires on 17mm rims. Granted they are a low pressure application and you have to be careful about brake alignment but you have to be careful about brake alignment anyway. I can't think of a single wheel that I own that has rims wider than 17mm and that's running tires from 23mm to the 53mm mountain bike tires for a vast array of applications.

Here's a little info from Mavic. https://www.tech-mavic.com/tech-mavic.../Tech_Spec.pdf