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I have a Kent brand fixie bike with 700x38c tires and I am looking for a new front wheel what size should I buy

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    It's a relatively simple operation to measure the existing rim width. But, unfortunately, there is some inconsistency as to whether the manufacturer's stated rim width is internal width or external width. There's about 4mm difference between the two numbers. – Daniel R Hicks Dec 12 '16 at 3:23
  • It should also be noted that quite often there is a decal on the rim giving it's width, if you study it a bit. – Daniel R Hicks Dec 12 '16 at 12:27
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Something between 17mm and 23mm wide. Searching for bicycle tire width rim guide will get you more information. So anything from 700x17 to 700x23 will suit you. If you think you likely use skinner tires in the future, stick to the smaller end of the range. If you think you'll go wide, stick wider.

  • That this refers to internal width without any clarification is very confusing for a newcomer. – Nathan Knutson Dec 12 '16 at 18:54
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Any 700C or non-plus 29er wheel will be able to physically mount it, but there's then the consideration of rim width relative to tire width. Rims for road bikes are usually 20-21mm wide or so measured across the outside. You ideally want something more like a hybrid/touring or XC wheel for a tire that size, with an outside width of 22-25mm.

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