Elite Arion Parabolic Roller Comes with a very light frame (approx. 7 kg), ultra strong, in glass fibre reinforced polyamide & parabolic rollers, 85mm in diameter in the middle & 100mm at the sides, make it easy to keep balance on the bicycle. Maximum control & ease of pedalling, acheived because the wheel is guided towards the middle of the roller & with a perfectly smooth surface on the rollers & the compound in anti-static plastic material reduce noise & tyre wear.A platform is incorporated in the structure for easier mounting & dismounting as well as being compact & foldable, making it easy to store. Compatible with road bikes & MTBs Dimensions: open 141x 49, 5x 16 cm, closed 73x 49, 5x 22 cm