Chainring 104 BCD: 32T 34T 36T 38T chainring suitable for XC off-road bikes (without extension plates) or AM FR DH with steep slopes, very easy to install.Lightweight construction: the 104 BCD tray is made of T6 alloy structure, lightweight but sturdy, with positive and negative teeth designed to prevent the chain from falling off, and can lose about 1kg of weight.Wide and narrow tooth design: ensures chain retention, effectively protects the frame from scratches, extends the service life and reduces friction and noise; The surface is easy to clean.Practical gift: the bicycle tray with quality material can keep the surface smooth, bright color, fading, corrosion resistance, it can be a return home, Christmas, Thanksgiving or New Year gift to your husband, wife, boyfriend, girlfriend, child.BCD: 104 mm; Shape: Round; Diameter: 32T/135 mm, 34T/144 mm, 36T/152 mm, 38T/160 mm; Note: Suitable for most 104 BCD cranks; Please make sure your crank BCD and the number of front tooth specifications buy