SIZE: ROCK BROS mountain bike pedals weight 0.83lbs(380g) each pair, the dimension of bicycle platform is 4.09(L)*3.94(W)*0.79(H) inches, 104mm wide platform pedals support the foot more evenly during cycling, provides a more comfortable riding experience for you. SUPERIOR SMOOTH BEARING: The lubricated sealed DU bearing platform pedals feature sturdy and durable, keep pedals spin smooth and without noise. The spindle composite of chrome-molybdenum steel material, Carbon fiber bushing outside of the spindle makes it more durable and anti-corrosion. GREAT GRIPS: Anti-skid nails on each side of the mountain bike pedals provide more security on the pedals and effectively prevent your shoes from sliding off, each side of the pedal with 9 stainless steel pins, provide strong grips and we gift extra 3 nails to replace, make the cycling safer, better for riding or racing. DURABLE & STURDY: The Mtb pedal body is made of CNC integration aluminum alloy material, give you a sense of security no matter how tough the terrain. 9/16 inch standard spindles, suitable for most mountain bikes, MTB, road bikes, commuting bike, urban bikes, BMX bikes, city bikes, etc. EASY TO INSTALL: Using 6mm hexagon installation and removal, the notch on the nut is for the left, the smooth on the nut surface is for the right. Great quality guarantee & Lifetime warranty included, we offer you a full money back or replacement with any questions. Customer satisfaction is our highest priority.