is a supremely comfortable, well-ventilated and secure-fitting helmet. The new 'Spherical' Mips technology works well, and Bell has integrated it very subtly, with a little extra weight the only penalty compared with rival helmets around this price.
Luckily, I didn't have to find out whether this works first hand, but from the amount of movement available between the two shells, I have no reason to doubt how effective it would be. You can also move the cradle vertically to further adjust the fit. I found that the helmet stayed in place very well on a variety of rides, from long road sessions to intense and bumpy gravel rides.
Ventilation is also good, which is impressive given that you are basically wearing two helmets. This again comes from the Spherical system's custom build and its ability to channel air freely through its 16 vents.
Bellhelmets In what circumstances does it prevent serious head injury? Eg up to what impact velocities?