Turbolight’s Evo HD tire insets were designed for gravity. They are slightly wider + taller and feature a harder compound than other Tubolight inserts. The Evo HD inserts were developed to work with stronger casing tires from 2.35 to 2.80. Minimum inner rim width is 26mm, and maximum overall width is 46mm. 90 grams for the 29. Best application: trail (rear only), enduro, downhill, and e-bike.