Chainring SAMOX E-bike 34h Narrow wide BCD104 aluminium black

• Narrow wide chainring, aluminum 34 teeth
• Fits 1/2" Chain width for 3/32", 11/128" chains
• 4-bolt mounting
• Color: Black BCD/cross bolt hole spacing 104mm
• Weight: 0.057 kg
• Measuring bolt hole spacing on 4-bolt models: measure the distance between bolts across adjacent holes. For 5-bolt models: generally use the provided measurement chart as a guide.
• Number of bolts on the chainring
• Distance between two different holes Cross bolt hole spacing in mm and inches (PCD/BCD)
• 4 bolts: 45.3 mm / 1.78 inch, 64 mm
• 4 bolts: 56.6 mm / 2.23 inch, 80 mm
• 4 bolts: 62.2 mm / 2.45 inch, 88 mm
• 4 bolts: 66.5 mm / 2.62 inch, 94 mm
• 4 bolts: 67.9 mm / 2.67 inch, 96 mm
• 4 bolts: 72.1 mm / 2.84 inch, 102 mm
• 4 bolts: 73.5 mm / 2.90 inch, 104 mm
• 4 bolts: 84.9 mm / 3.34 inch, 120 mm
• 5 bolts: 43.5 mm / 1.71 inch, 74 mm
• 5 bolts: 55.2 mm / 2.18 inch, 94 mm
• 5 bolts: 64.7 mm / 2.55 inch, 110 mm
• 5 bolts: 76.4 mm / 3.01 inch, 130 mm
• 5 bolts: 9.4 mm / 3.12 inch, 135 mm

Calculation formula for bolt circle diameter (BCD) using outer bolt spacing:4-bolt:Distance between adjacent holes divided by 0.7071 = bolt circle diameter

5-bolt:Distance between adjacent holes divided by 0.5878 = bolt circle diameter