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Using the Park Tool BTS 1 Tap. Cleaning bottom bracket threads. New frame threads were bad. - YouTube
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Amazon.com : Park Tool 1.370-Inch x 24 TPI Right Hand English Tap for BTS-1 : Bike Repair Tools : Sports & Outdoors
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PARK TOOL - BTS-1 อุปกรณ์ต๊าปเกลียวและฝนระยะความกว้างกระโหลก BOTTOM BRACKET TAPPING & FACING SET (สินค้ามือสอง) | Lazada.co.th
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