IKIER R2 Manuel D'installation page 4

Installation Guide
Step 2: Choose different gears to install according to the engraved items
Gear 1： 10mm≤ d ≤20mm Gear 2： 30mm≤ d ≤40mm
Gear 3： 40mm≤ d ≤50mm Gear 4：50mm≤ d ≤80mm
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