Trek's 32-inch wheel prototype

The fact that Evie Richards is testing it is a pretty big hint that it's definitely viable for smaller riders. If a pro like her is running it, it's unlikely they've built the whole thing around a rider who's significantly taller than the rest of the field. It's a bold move for XC, but if the rollover and momentum benefits are as good as they say, it's hard to see why smaller riders wouldn't want that advantage, regardless of the wheel diameter.

armywife said:

If a pro like her is running it, it's unlikely they've built the whole thing around a rider who's significantly taller than the rest of the field.

That’s a solid point, but a prototype can be hand‑tuned for a specific athlete. It doesn’t prove the design scales cleanly to the broader pool of smaller riders. Bigger wheels raise the bottom bracket, stretch the chainstays and shift the stack‑reach, which can make the bike feel lanky unless the frame geometry is re‑engineered.

From my folding‑bike side of things, the whole appeal of a bike that folds tight is its portability. Adding 32‑inch wheels adds mass and bulk – you lose the compact‑cheat‑code that makes a fold‑bike a city‑train hack. So while Evie’s test shows it can work, I’m skeptical it will become the universal XC norm, especially for riders who need a tighter fit or a bike that can still be packed onto a train.

The bigger rim inevitably raises the bottom bracket and lengthens the chainstays, which pushes the stack‑reach forward and can make the bike feel lanky. That geometry shift can be countered, though, by redesigning the frame – a shorter top tube, a steeper head‑tube angle and a slightly lower stack are exactly what Trek’s Women‑Specific Design (WSD) models do to suit riders with a shorter torso‑to‑leg ratio. In practice that means a smaller rider doesn’t have to rely on a shorter stem alone; the tube lengths themselves give a genuine fit advantage.

Weight is the other side of the coin. A 32‑inch wheel typically adds a couple of hundred grams over a 29‑inch, and the larger fork and tire volume bit up the front end. On a well‑built OCLV carbon platform the extra mass is manageable, but it erodes the low‑weight advantage that makes XC bikes so nimble.

So, yes – a 32‑inch setup can work for a smaller rider if the frame geometry is purpose‑built, but it won’t replace the 29/27.5‑inch norm across the board. The trade‑off between rollover stability and added weight, plus the need for a geometry redesign, keeps it a niche rather than a universal standard.