The27.5 is smaller diameter side by side but rolls over rocks and roots better because of the compliance of the deeper sidewall. I feel the 27.5+ is much funner for everyday trail riding and especially technical section. Where the 29r still has the edge on speed in non technical XC situations.

Thedifference between 650b and 700c is the rim diameter. 650b are smaller rims. 650b wheels measure 584 mm in diameter. 700c wheels measure 622 mm in diameter. 650B wheels are 38mm (about

6 Handling. Winner – 27.5. Again, the 27.5 was introduced to narrow the distance between the 26er and 29ers. What most riders find though, is that the 27.5 aligns more closely with the 26er. With a shorter and lighter wheelbase than the 29er, the 27.5-inch bike is going to require less energy to move around. Inshort, the smaller the angle, the easier it is for the wheel to roll over the object. 29-inch wheels are particularly reliable and stable on rough and speed descents and climb. Many riders feel more confident with larger wheels. Compared to the 29er, 27.5-inch tires do have a better angle but not as significant.
If29 becomes the standard over 27.5 I might quit mountain biking. 26 isn’t dead. I have a Banshee Spitfire which is convertible between 26 and 27.5 on a new bike.
Ifyou look at a Geo chart for 29 VS 27.5 you'll see significantly larger bb drop on the 29 and similar bb heights. it was the same arguments for 26 vs 27.5, but I bet you won't buy a 26 bike Witha circumference that’s 11.5% bigger, a 29er tyre will have an 11.5% larger air volume. So all things being equal, you should be able to run a 29er tyre with 11.5% lower air pressure than an equivalent 26-inch tyre. If you typically run 30psi in 26-inch wheels, you should be able to use 26.5psi with 29-inch wheels. Easyto right through tight terrain. 27.5 have been around for many years as a slight step up from the traditional 26-inch wheels of the past. 26 inch wheels were too small, 29ers were too big, so 27.5 was the goldilocks in between sizes. They provide a greater rollover and stability while retaining the agility of a smaller 26-inch wheel.
A29er wheel up front is all business–providing high speed stability and better obstacle clearance–while a 27.5 in the back brings the party–with more maneuverability and faster acceleration. If you’re a shorter rider or
The27.5 mountain bike wheel size offers the best of both worlds between a 29er and 26-inch wheel. These wheels, sometimes called 650b wheels, are the middle
Now when mountain biking first started, the 26 inch wheel was the only option. The 26 incher is lighter than the 27.5 or 29 inch, largely because, well, there’s less of it. Being smaller, lighter and more agile, bikes with 26” wheels offer much better acceleration than their larger counterparts, making it great for short, steep climbs and
Somebrands say that the optimal travel cut-off for a 29er is approximately 130mm, then we see more and more 27.5" wheels above this in the trail, enduro and all-mountain categories. For more information check out: " 26" vs 27.5" vs 29" wheel tech and knock-on effects " and " An introduction to 650b (27.5") wheels "
275 x 3. Super reliable 27.5+. Teravail’s Coronado tire is a plus-sized 27.5 that will fit on many modern mountain bike frames that aren’t explicitly designed for fat tires. It has a wide enough profile that it floats over sand and allows for more exploration compared to regular mountain bike tires.

26 vs 27.5 - again in All Mountain, Enduro & Cross-Country. Watch; Learn; I tell guys looking for a great deal on a used bike to find a 26 in 2x10. Everyone wants 27.5 or 29 in 1X. There are

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    • 26 vs 27.5 vs 29