^ I have Alexrims Race 38 which, according to their website, have an ETRTO of 622x15. I presume the 15 relates to the internal rim width and therefore the second row in the table. However, the bike came with 700x28 tyres off the peg.
As long as you are riding road/slick tyres with sufficient pressure u can go fatboy 47c on your standard rims.
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^ I have Alexrims Race 38 which, according to their website, have an ETRTO of 622x15. I presume the 15 relates to the internal rim width and therefore the second row in the table. However, the bike came with 700x28 tyres off the peg.