fomtor 30t chainring 104 bcd narrow wide chainring with four chainring bolts for road bike, mountain bike, bmx mtb fixie bicycle (black) fomtor <p><b>specification:</b></p> <p>material: 7075 t6 aluminum alloy<br /> shape: round<br /> size: 30t<br /> compatibility: 9/10/11 speed<br /> bcd: 104 bcd<br /> weight: 46g(30t)</p> <p><b>feature:</b></p> <p>1.the new narrow-wide teeth design increases chain retention, wear life, and reduces friction and noise.</p> <p>2.super durable and light weight</p> <p>3.with four chainring bolts.</p> <p>4.easy to install and fits perfectly the 104mm bolt pattern.</p> <p><b>packing included:</b></p> <p>1 x 32t chainring<br /> 4 x chainring bolts</p> <p><b>installation note: </b></p> <p>please determine your crank bcd specification carefully before buying.<br /> </p>