Bike Wheels Tip Of The Day by BikeBlogger

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Bicycle wheels come in a variety of options. There’s 650b, 27.5”, 700c, and 29”. When choosing the proper wheel size for your bike it can seem extremely daunting. It’s enough to make your head explode. Luckily, today BikeBlogger is going to explain the different bike wheels sizes to us.

Here’s the following Bike wheels tips Bikeblogger will be covering while cycling through the city:

650b and 27.5” are the same wheel RIM (bead seat diameter) but will have a different rim width.

  • Wheels with an ISO diameter of 584 mm were originally known as 650b, and were first introduced on French touring bikes in the 1960s.
  • The size is still referred to as 650b when used on road or gravel bikes, but it has also been adopted and renamed by the mountain bike industry.
  • In recent years, mountain bikes have been moving toward larger wheels, and when 650b was re-purposed for off-road it became known as 27.5″.

700c and 29” are the same wheel RIM (bead seat diameter) but will have a different rim width.

  • The standard modern road bike wheel has an ISO diameter of 622 mm and is referred to as 700c.
  • The 700c wheel has taken the mountain bike world by storm in recent years and become known as 29″.
  • While the diameter for both 29″ and 700c wheels is the same at 622mm, rims made for mountain bikes are generally wider to accommodate wider tires.
  • All the advantages of a larger wheel mentioned above are pushed to the limit on a 29″ (or 29er) mountain bike, although some riders feel the sacrifice in maneuverability and turn radius are not worth it.

Tires may be interchangeable within a range of widths starting at 32 mm but check ETRTO.

Wheels must match the bike in terms of brake, axle, axle width, and frame clearance with an inflated tire.


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