
Do not buy a 65mm unless you have also verified your stock shell ID. This "65mm" kit has bearing rings (cups) with an inner diameter of 39mm. If this measurement matches your bearing raceways, buy it. This smaller "65mm" set is for a child's bike. If your race has an inner diameter of 47mm, buy the 68mm kit instead. The large "68mm" set is for normal bikes. Bottom bracket width is a poor parameter for determining which set to order, as some bikes that require a larger "68mm" set have bottom bracket width closer to 65mm than 68mm. Measure twice; buy once Rating would be 5 stars if the ordering instructions were better. Instructions were included in the 65mm kit. "68MMโ BOTTOM BRACKET KIT REVIEW: I also purchased a 68mm bottom bracket kit, but apparently I'm only allowed one review for both, so I'm cramming into the 68mm review here. The parts appear to be of good quality except the bearings are weak. If you leave the bracket hanging on anything when installing the crank, some of the bracket hooks will bend and you'll chase ball bearings. BE VERY CAREFUL NOT TO TIGHTEN THE BEARING BRACKET when installing or removing the crank. To install the bearing cups without the expense of a bearing press, I used a 5/8"-11 t/in bolt, 4" nut and two large washers. There were no instructions for this set. .

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