2023 Santa Cruz Bronson

29er bikes have a ton of front wheel grip because of the wheel itself and the axle height of the rear wheel, which keeps the front end weighted. This generates a natural position on lower-angle terrain, but body position and/or set-up adjustments are needed for rearward bias. The bias is more rearward on an MX bike. This creates a natural feeling on steep descents, but it requires some body position and/or set-up adjustments for a balanced feel on flat terrain. MX feels more like a 29er with a slightly lower handlebar and a more forward-biased suspension set-up. The hi BB setting also results in a more front biased feel. Use these parameters to find the sweet spot for your ideal riding preference and the terrain.

An MX bike handles differently than a full 27.5" bike. It feels more stable and confident in the front end. Turning is a bit slower than a 27.5" model, but you get a more secure cornering and more traction. The bigger wheel gives you a taller front axle height and more rollover clearance, so you're much less likely to stuff the front wheel or fly over the bars. Overall, you can ride challenging terrain with a more aggressive and dynamic body position.

The bike is made specifically for mixed wheels. Santa Cruz doesn't recommend a 27.5" front wheel due to the geometry. XS is the exception because it's a full 27.5" bike.

XS has 27.5" front and rear wheels. All other sizes have MX.

You get the traction and stability of a 29" front wheel and the agility of a 27.5" rear wheel. The smaller wheel has a lower axle height, which allows you to more easily unweight the front wheel.