【Scientific Design】Our mountain bike steel single crank chain standard tooth design ensures ultimate chain retention, extended wear life and reduced friction and noise. So well designed, you deserve it useful. 【4 Sizes】Bicycle Chain Crank is easy to install and fits perfectly the 104mm pattern,in the meanwhile there is 4 sizes 32, 34, 36, 38 teeth for choosing,always one option fit for you. 【High Strength】Moutain bike Chain ring has high strength and deformation resistance properties, for long time use,very affordable. 【Premium Material】Our Chain Ring is made of premium aluminum alloy, which is lightweight, adding no heaviness to bike. So that moutain bike chainring will not add extra burden to your car. 【Best Choice】Our mountain bike steel single crank chain ring is made of superior materials, high quality and beautifully designed. There are 4 different sizes for you to choose from. Our products are your best choice！