Chainring SAMOX E-bike 36h Narrow wide BCD104 aluminium black

• Narrow wide chainring, aluminum, 36 teeth
• Fits 1/2" chain width, for 3/32" and 11/128" chains
• 4-bolt mounting
• Color: Black
• BCD / cross hole spacing: 104mm
• Weight: 0.057 kg
• Measuring bolt spacing on 4-bolt models: measure the distance between adjacent holes; for 5-bolt models, generally use the provided measurement chart as a guide.
• Number of bolts on the chainring Distance between two holes Cross hole spacing mm / 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: 79.4 mm / 3.12 inch — 135 mm

Calculation formula for bolt circle diameter (BCD) based on bolt spacing:

4-bolt: Distance between adjacent holes ÷ 0.7071 = bolt circle diameter

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