As a neutral, I can’t understand why there is so much “hate” for different wheel sizes. People have highlighted the very small percentage difference between the 26″ and the 27.5″ bike, but the percentage difference between a 70 degree head angle and a 67 degree head angle is similarly small, but you won’t find many on here arguing that there isn’t a fundamental difference in the way the bikes ride. Similarly with tread patterns, tyre compounds, frame geometry (not many on here riding 90s style “gates” I’ll wager). Small differences that can mean significant gains dependent on riding style, priorities, terrain etc etc.
For me I can see how bigger wheels do roll better, they are less likely to get sunk into small bombholes or caught on roots, they will handle drops better. By the same token they are less manoeuvrable, slower to accelerate and harder to lift up and over stuff. Horses for courses I guess.
In truth though, I can’t understand why there seems to be no correlation between frame size and wheel size. Look at a 26″ bike with an XS frame and one with an XL frame. The position of the frame (and therefore the rider) in relation to the wheels is totally different. With an XS the rider is sat much more between the two wheels, with the XL he/she is perched on top. To me it makes more sense to have larger wheels with larger frames. As a 6’4″ rider I’m about to buy (subject to trying it out and liking it) a 650b bike, it just seems to me that it will be a better fit.
I can’t help thinking that for an industry that is so young, the mtb industry has packed an enormous amount of innovation into its 30 or so years. To me wheel size is just part of that. The 26″ size became a standard pretty much by default, but there have been proponents of 29″ for at least 20 years (the great Gary Fisher being one) and 650 has been talked about for at least 10 years. I don’t see anything wrong with the industry trying different things to see what fits.
Gee Atherton could ride a penny farthing down a given trail far quicker than most of us could ride any type of FS bike. It’s a false positive using him as an example. For the average rider, wheel size could be as important as geometry, tyre choice etc etc.
Rant over. Sure the usual posters of “funny” gifs will have a field day. At the end of the day though, just find what works for you and get out there and ride 🙂