But that isn't what is happening. When it's all said and done, the 29 XC bike isn't going anywhere. 27.5 is largely replacing 26, so I'd say that the 27.5 is actually a continuation of the trend towards larger wheels. But for an bike with heavier low-cost wheels, the heavier wheels would bias things in favor of 27.5. Nowadays 650b wheels are used by tandem bikes, old European utility bikes and many mountain bikes. 27.5″ wheels offer several advantages compared to 26 and 29″ wheels. These advantages include: 27.5-inch wheels offer a shallower attack angle than 26″ bike wheels, which makes crossing uneven terrain and large obstacles smoother. There is a reason why road bikes and XC mountain bike racers use this size wheel. 2: Standard 26 inch mountain bike wheels. This was just about the global common standard mountain bike wheel and is found on bikes all over the world. It was by far the easiest size to pick up spare tubes, spokes and tyres in remote places. The pictures do clearly show the huge difference between 29" vs. both 27.5 and so called "26" inch wheels and tires. Riding the same bike on the same trails, it is amazing to feel how well the 27.5" wheels roll rocks and track in corners better than an equivalent 26" wheel and tire. The difference is most noticeable going back to the 26" wheels 26er – pang all-around na, swak pang-beginner na di pa sanay sa bike. 27.5 – sweet-spot para sa mga mahihilig lumaro sa trails, dahil mas responsive ang handling nito sa trails at hindi naman naiiwan sa patag. 29er – swabe ipang-long ride, kahit hindi ka malakas sa padyakan, hindi ka maiiwan ng grupo dahil sa laki ng gulong nito. The same tropes are true for ebikes as are for trail bikes. The full 29r setup provides a bit more ultimate grip at the expense of quick mid corner adjustment maneuverability. The full 29rs provide a bit better momentum and roll over for chunky/ledgey terrain. The mullets are easier to jump, drift and mess around on. Wheel size refers to the diameter of the wheel and is less important than the size of the frame. Mountain bike wheels come in three basic sizes: 26″, 27.5, and 29″. Very petite women may want a 26″ wheels but most will be best served by a 27.5″ or 29″ wheel. These two wheel sizes are becoming more common on modern mountain bikes, so Fezzari dropped their Delano Peak in July giving riders an option between their other two full-carbon, full-suspension MTBs. In between the Signal Peak and the La Sal Peak, the Delano has 135mm of rear travel with a 150mm fork and very modern geometry. The 29er trail bike has a 77.5° seat tube angle and a 65° head tube angle. 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. The Best Hardtail Mountain Bikes. Best Overall: Trek Roscoe 7. Lightweight and Balanced: Specialized Rockhopper Elite. Best Hardtail Deal: Salsa Rangefinder Deore 29. Best Kids: Specialized UKzOjkc.