Wheels Manufacturing 24x37 Sealed Bearing Extractor - BB30 The Wheels Manufacturing 24x37 Sealed Bearing Extractor - BB30 is an essential tool for anyone needing to remove sealed bearings. Whether you're using it as a genuine spare or as a standalone tool, it ensures precision and ease in your maintenance tasks. Key Features Designed by Wheels Manufacturing for reliable performance Requires the correct size extractor, along with 8 mm & 10 mm wrenches for small extractors or 13 mm and 17 mm wrenches for larger ones, plus a hammer and punch Extractor fits snugly into the inner diameter (I.D.) of the bearing Place the extractor into the I.D. until it sits flush with the shoulder Secure the extractor by tightening the nut with a wrench while holding the extractor with another wrench Align a punch with the back of the extractor and gently tap to remove the bearing Once removed, install new bearings using a Wheels Mfg PRESS-1 for rear hubs and BBs or PRESS-2 for front hubs With the Wheels Manufacturing 24x37 Sealed Bearing Extractor - BB30, you can efficiently remove and replace sealed bearings, ensuring your bike runs smoothly.