Mixed 29" and 27.5" wheel sizes, a.k.a. the Mullet, has become a big talking point in downhill and enduro MTB racing. This isn’t the first time the mountain bike industry has played with mixing wheel sizes. One of the big talking points in pro downhill and enduro racing has been wheel size. In the fall of 2018, the UCI relaxed rules stating
Most mountain bike tires will measure between 2.35 and 2.6 inches, however, the best MTB tires for mud and cross-country tires that prioritize rolling speed will often measure 2.2 inches and lower. You do get larger tires with 2.8 inches becoming a popular size for the rear wheel of the best electric mountain bikes and the now lesser popular
3535 posts · Joined 2004. #1 · Dec 11, 2014. Looking at the proliferation of 650b ("27.5") bikes it downed on me that unlike the conversion 26 to 650b the reverse, 650b to 26, is much easier. Putting to the side all the diatribes, at the end of the story the difference in radius between 650b and 26 is just around 1cm, and to use a 26 wheel on
Your bike wheel size plays a role in the acceleration, and when it comes to choosing the right mountain bike wheel size, remember that the 27.5-inch wheels will accelerate faster than the larger wheels. The 29-inch wheels can still accelerate quickly, but depending on your riding style, it may be a better option to choose the thinner tire width.
An attempt to settle the battle of the mountain bike wheel sizes finds a clear winner—but doesn’t consider 27.5, a major size option. times on 26-inch bikes and three times on 29-inch
Hoping the 29 x 2.6 is a better match. I stuck a yardstick behind my 29x2.6 XR4 on an i30 rim and eyeballing it, it's a bit over 29 1/2 inches tall. My 27.5x3 i36 wheel is just a bit over 28 3/4. So about 3/4 inch taller. Figure half of that for rise in BB.
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