This is not an attempt to provide an authoritative source on rim widths; that debate will continue to rage. Rather, this is a comprehensive summary of what manufacturer's suggest. If you want a quick answer of what a good, broadly-recommended tire and rim combination would be, these charts will give it to you much more quickly than any other source I've found.

I grabbed recommended tire/rim width combinations from Stan's, ENVE, DT Swiss, Ibis, Santa Cruz, i9, and Zipp, then plugged them into a spreadsheet and took the averages. The result is these charts - all rim widths are internal. Note that even the Min and Max columns are averages, so any one company may provide suggested widths well outside this range. For instance, Stan's pushes using narrower rims than most other companies. ENVE will have you on a wider rim.

Many people have great results running tires beyond the edges of these charts. Tons of wider modern tires are mounted on skinny rims, because that's what people have. I've run 2.6" tires on i25 rims with great success. Other people love the supportive feeling of a very wide rim, such as an i35 rim with a 2.35" tire.

Tires and rims also vary in effective size. A hooked or hookless rim will carry the tire slightly differently, and of course tires can vary dramatically in width from their marked size. Certain tires are also optimized for wider or narrower rims, although in my experience these tweaks to tire design are quite subtle.

Finally, I rounded all the numbers to even rim widths in mm, and tire size in 0.05" increments. You will thus see some minor disagreements if you read the same combos off both charts. Again, don't get bothered by 1 or 2mm of rim width!

Rim Min tire Avg Max tire
23 1.95 2.10 2.25
24 2.00 2.15 2.30
25 2.05 2.25 2.40
26 2.10 2.30 2.45
27 2.15 2.35 2.50
28 2.20 2.40 2.55
29 2.25 2.45 2.65
30 2.30 2.50 2.70
31 2.35 2.55 2.75
32 2.35 2.60 2.80
33 2.40 2.65 2.90
34 2.45 2.70 2.95
35 2.50 2.75 3.00
36 2.55 2.80 3.05
37 2.60 2.90 3.15
38 2.65 2.95 3.20
39 2.70 3.00 3.25
40 2.75 3.05 3.30
41 2.80 3.10 3.40
42 2.85 3.15 3.45
43 2.90 3.20 3.50
44 2.95 3.25 3.55
45 3.00 3.35 3.65
46 3.05 3.40 3.70


Tire size Min rim Avg Max rim
2.10 20 23 26
2.15 21 24 27
2.20 22 25 28
2.25 23 26 29
2.30 24 27 30
2.35 24 28 31
2.40 25 29 33
2.50 27 31 35
2.60 28 33 37
2.70 30 34 39
2.80 32 36 41
2.90 33 38 43
3.00 35 40 45
3.10 36 42 47
3.20 38 44 49