Rim width for 28mm tyres (rim brake)

Bring your questions & complaints to the Weight Weenies moderators, here! Also, News & Announcements. Use the other boards for bike related talks.
Post Reply
Posts: 5
Joined: Mon Apr 08, 2024 7:10 pm

by JMark01

Looking to get new rim brake wheels to fit 28mm tubeless. What's the best for comfort and aero - 19mm int, 27mm ext or 21mm int, 28mm ext? Thanks!

by Weenie

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓


Posts: 341
Joined: Tue Apr 13, 2021 3:00 am

by charirider

I had run 28mm gp4 season on 17mm int/26.5mm ext Metron 40SL wheels, measured 27mm so pretty aero combo.
Don't know how tubeless comes to true size, but I guess 19int/27ext will be ok for 28mm tires.
Of course, the more the better, but I doubt you'll notice it unless you are doing pro level TT and chading seconds on 40km course lol.
Safety wise, 21int is ok for 28mm tubeleas tire.
25/26mm tire might be not so safe to ride on 21mm int though...
I would suggest go for whatrver lighter!
2018 Cannondale SuperSix EVO 2 rim size 56 (raw stripped) 6.8kg
2014 Bridgestone Anchor CX6 Equipe size 55 (cyclocross) 9.6kg

Post Reply