Specifications:<br><br> Crank Set Material: 6061 Alloy<br> 38T Narrow Wide Gear Chain Ring Material: Alu 7075<br> 38 Tooth Chainring Weight: 71.5g(0.15 lbs)<br> Single Chainring Fits For 9/10/11S 104 BCD 1X MTB Crankset<br> Crank length: 170mm<br> BCD: 104mm(outer circle) square Taper hole<br> BB type: BSA Bottom Bracket<br> Suitable for most of 9 10 11 Speed MTB Mountain Bike,Road Bicycle<br><br> Package Include:<br><br> 1 x 104 mm Bike Crank (BB not included)<br> 1x 38T Chainring Narrow Wide Teeth<br> 4 x Crank Arm Set Bolts(M8*8.5mm)<br><br> FAQ<br><br> Q: What is the size of crank?<br> A: 104mm BCD<br><br> Q: What is the lenght on this arm?<br> A: 170mm<br><br> Q: Does this Crankset come with Bottom Bracket?<br> A:No<br><br> Q: What pedal size does this Crankset work with? 9/16 or 1/2?<br> A: 9/16"<br><br> Q: Is the crank Chainring removable?<br> A: yes , this crank is Triple crankset design. You can modify the crank into single speed chainset,2 or 3 pieces chainring crankset<br><br> Q: Does this work on a square taper Crankset?<br> A: It is a crankset made for square taper bottom brackets<br><br> Q: What is the crank bolts size?<br> A: M8 , 4 set bolts are incuded in the parcel<br>