Tire Size Chart For Bicycle Rim

When it is time to replace your well-worn tires, it is a good opportunity to unlock the full potential of your wheels by trying something new. This chart will provide guidance on what tires sizes can match your internal rim width.

Unfit tire size could damage the rim and put the riders in danger. If the tire is not wide enough, you’re risking more pinch flats and blowouts; if it is too wide, tire burping and poor stability may occur.

In this blog, we list the recommended tire size charts for LB mountain/road/fat rims. Check it carefully before ordering carbon rims or buying new tires. If your combination is not listed here, please contact us to discuss it.

MTB RIMS / TIRES

Internal rim width (mm) 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 40 45 50
Tire size 1.9"
Tire size 2.0"
Tire size 2.1"
Tire size 2.2"
Tire size 2.3"
Tire size 2.4"
Tire size 2.5 - 2.7"
Tire size 2.8 - 3.1" (Plus)

ROAD RIMS / TIRES

Internal rim width (mm) 17-19 20-21 22-23 24-25
Tire size 23-25C
Tire size 25-28C
Tire size 28-30C
Tire size 30-33C
Tire size 33-35C
Tire size 35-38C
Tire size 38-40C
Tire size 40-43C
Tire size 43-45C
Tire size 45-48C
Tire size 48-50C

FAT RIMS / TIRES

Internal rim width (mm) 55 60 65 70 75 80 85
Tire size 3.8 - 4.2"
Tire size 4.3 - 5.0"

Recently we have done some tests on tire width and weight and make them good blogs to help you choose the right tires for your bike quickly.

popular-bike-road-tire-actual-widths-measured-on-LB-carbon-rims.jpg
29-27.5-inch-bicycle-tires-actual-weights-vs-claimed-weights.jpg

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COMMENTS

V

Vio 2020/08/07

Hi there, I currently ride a gravel bike with 700 x 40c tires on a 21mm inner width, 23mm depth rim and if it's possible I would like to know how skinny on the tires I could go, thank you in advance.


LightBicycle 2020/08/07

Hi Sir, Our recommendation tire range for 21mm internal rim is 25-43c. Since your rim is not from us, so we cannot be sure if you can run out of this range. Thanks, Lightbicycle


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C

Conor 2020/08/04

I have a Specialized Stumpjumper 29" 6Fattie. Currently I have 3" tires on 584x38mm wheels. Whats the thinnest tire I can mount? Thanks in advance!


LightBicycle 2020/08/05

Hi Conor, Is 38mm refer to the internal width of your 29er bike rims? If so, the narrowest tire we recommend is 2.8". Thanks, Lightbicycle


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A

Ashhar 2020/07/20

Hi, I have a mountain bike with a rim width of 21 mm that currently has a 2.2-inch tire. Your chart says that I can fit a 2.3-inch tire. Is this recommendation for any specific rim/tire or is it general? My rim is Giant GX03V 27.5", alloy, double-wall, 21mm inner width and the tire I want to put on is Maxxis Aggressor 2.3 inch tire. Can you please advise if it is okay to put on this tire? Thank you


LightBicycle 2020/07/21

Hi Ashhar, Our chart is not for any rim with 21mm internal width considering the rim bed design varies from factories. So many factors will affect the tire mounting performance, the bump, center channel depth, hook type, rim edge design, etc. We cannot vouch for other factories. If you want to be sure, pls contact the original manufacturer. So if you have a Light Bicycle made 21mm internal rim, we can tell you that 2.3" tires would fit ok. Thanks, Lightbicycle


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H

Haim 2020/07/17

Hello -- I have 19mm inner rim width. Bontrager Race X Lite I have been running 2.2 inch tires for years with no problem. Looking to go to 2.3. thoughts. I've seen charts where this is ok. Your chart shows 2.1 as the widest.


LightBicycle 2020/07/18

Hi Haim, Our tire fitting chart shows the best-recommended range we come up with according to our years of experience. 2.3" might fit with 19mm internal rim with no problem. Thanks, Lightbicycle


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S

Stuart 2020/07/14

Hi there. I have just bought a Cannondale BadBoy with 700c rims with internal of 25mm. What's the biggest gravel tyres I can put on these please? I've read upto 44mm but I'm unsure? Thanks in advance!


LightBicycle 2020/07/14

Hi Stuart, Take our rims, for instance, the 25mm internal rims like WR38/50, our recommended tire range is from 28c to 50c without any problems. We cannot guarantee this result work for all rims made by other factories because the design of the center channel, bead hook, and center channel are different. Thanks, Lightbicycle


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M

Marjan 2020/07/08

Hello! Just bought a Cannondale Topstone with WTB ST i23 TCS rims (23 mm internal). I am in the market for as fast slick road tire as i can possibly put on my wheels. Is 28 mm wide tyre going to work or should i look for something wider? Thanks a lot!


LightBicycle 2020/07/10

Hi Marjan, First of all, I want to point out that our charts work the best for Light Bicycle made carbon fiber rims/wheels. Your rim is alloy rim so the rim profile design might be different from carbon rims. For a 23mm internal rim, our tire fitting range is usually between 28-48c if you plan to ride road bikes. However, I notice this is an MTB rim, The tire pressure and riding conditions will be very different. The tire should be around 2.0-2.4" tires. Thanks, Lightbicycle


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W

Wouter 2020/06/30

Hey, im getting new wheels in my bike soon: (Ridley) VARDAR db wheels. I was thinking about matching it with 28mm tires, but im not sure if that's the way to go since 25mm might be better? Here are some stats on the wheels: Vardar DB Hub Forza 7 Beaufort db Brake Type Disc brake: 6IS Set weight 1490 g Rim Type Clincher Rim material Carbon Rim depth 45mm Internal rim width 17mm External rim width 27mm ETRTO 622-17C Recommended tire size 23-45mm Spoke count Front 24h - Rear 24h Release system TA12 F: 100mm - R: 142mm Thanks in advance! :)


LightBicycle 2020/07/02

Hi Wouter, The 28c tires should not be an issue for your wheel according to your specifications. However, some 28c tires are tricky to work with given our mounting experience, like Vittoria Rubino Pro Endurance 700x28c or Michelin Power Endurance 700x28c. Use a lever when the mounting got challenging. Thanks, Lightbicycle


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M

mike 2020/06/23

26x190 is stamped on my rim which coaster tires would fit from smallest to largest thank u kindly mike


LightBicycle 2020/06/23

Hi Mike, Normally, rims manufacturers don't mark the measurement data on the rim surface. You can check with your supplier and remove the tires and measure the wheel inner width. Thanks, Lightbicycle


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W

wii 2020/06/21

can i put a 2.25 tires on a 2.20 rims


LightBicycle 2020/06/22

Hi Wii, Could you tell me the internal width of the bike rim mtb? The tire fitting is affected by the internal width and center channel design. Thanks, Lightbicycle


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H

Hart 2020/06/14

Hello: I have an ALEXRIM DM18 rim and would like to know which tires will fit on it. Thanks.


LightBicycle 2020/06/15

Hi Hart, The internal width of the DM18 is 17.9 ≈ 18mm. It's the same with our R rims 700C road. The closest rim we got is the R25 (17.9mm internal, 25mm outer width, 25mm depth). We recommend 21~38c tires for our R25 rims. So you can take this for reference. Note that tire fitting varies from rim and tire designs. Thanks, Lightbicycle


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