I was in this boat back in October, picked up a Whyte M109C Team 2014 at a great discount to replace my 2005 Turner Flux. At that time fitness was poor but I tested a Medium from a nearby shop on my local hilly, forested damp trails and on the Long Mynd in Shropshire.
Riding locally was incredible. Faster speeds on fireroads, singletrack, incredible traction on mud, more confidence and stability on tech up and down, and 29er wheels rolled over stuff. Some fiddling with pressures at front and back and with stem and seat setup got things feeling good for me.
Took it up to the Long Mynd and managed to ride all 2 miles up Minton Batch singletrack which has some steep kickers on mud, some rocks, and in mini-gulleys filled with streams. Traction was great, and height of BB meant I didn’t bash the pedals in the 8in wide gulleys, which I often did on the low BB Flux.
Coming back down the open grassy doubletrack trails was very fast and stable, great fast steering and line changes when I needed it, too. Big smiles.
Have got a slight reservation about the cramped bottle cage in small front triangle for long rides, but trying a side entry cage and smaller bottle and it seems to be the way forwards. Drinking from Camelbaks doesn’t work for me as I can’t clamp my mouth around the valve and end up with wet pants. 😯
Great fun, fast, stable, light bike.