Thereis ~1.5" in diameter between a 27" (23" rim) and 29" (24.5" rim). So that's 19mm radius and you've got 10mm travel difference. So in your case ~10mm is expected in A-C plus any allowance for different tyre sizes. Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro. youare doing your math on marketing numbers, not real numbers. There's a bigger difference between 27.5 and 29 than between 26 and 27.5. Actual rim diameters are. 559mm/22" (26) 584mm/23" (27.5) 622mm/24.5" (29) 024ng3 • 2 yr. ago. Yes but if you look percentage wise then 27,5 -> 29 is smaller jump. Furthermore a lot of fork and frame manufacturers let you swap out your 29er wheels for 27.5 plus wheels. For looser terrain or if you just want more comfort on the trail, Niner actually produces a number of models that are compatible with 27.5 plus wheels. 29 inch wheels also have the same diameter rim as road, gravel, and cyclocross bikes 275” Wheels. The 27.5” size, or 650b if you’re old-school, sits halfway between 26” and 29”. Therein lies the charm. Better-rolling than 26”, stronger than 29”, they make geometry easier for smaller folks as well as for bikes with long travel. Race Face, like Bontrager, and many others, offers 27.5” wheels in both aluminum and 275 vs 29 mountain bike - how to choose the wheel size that suits you best Which mountain bike wheel size is best? We compare 27.5 inch wheels and 29 inch Onthe other hand, 27.5-inch wheel bikes generally provide faster acceleration, are more agile, weigh less, and favor shorter riders. We’ll go into more detail below. 29 275 VS 29 Which wheel diameter is more suitable for you . Years ago, you didn’t need to worry about wheel size when buying a bike, because all models had 26-inch wheels. But with the development of technology, manufacturers developed the 29-inch model, and a few years later came the 27.5-inch (650b) model. 275-inch wheels are much more stable and give a smoother ride than 26-inch wheels. 27.5-inch wheels allow for a lot of flexibility in frame design. Tight angles, low Whileupgrading your 27.5″ mountain bike to a 29er may seem like a no-brainer for some riders, there are some potential drawbacks to consider before making the switch. Here are some key factors to keep in mind: Weight: 29er wheels are generally heavier than 27.5″ wheels, which can make your bike feel less nimble and responsive. Somepeople make an argument for height being a factor, taller riders may prefer 29”, vs shorter 27.5. Alternatively whether you value speed over maneuverability. 29” tends to be faster while 27.5 more playful. There are of course short people who like 29” wheels, and tall people who like 27.5. TLDR: pick a wheel size and be a dick about RL9WyYJ.