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I’ve started with 700c wheels on my Kepler disc with SKS guards and then built 650b dynamo / Novatec wheels and put 650b GB guards on. The front clearance is tight and a bit fiddly but I’ve not had any problems so far. The wheel size feels agile and doesn’t feel slower than 700 so I’m keeping it like this. If I ever take it on an off road ride I’d take the guards off and possibly swap tyres if it’s wet. Hope that helps.
Question - I’m building a Kepler Disc and would really like to give 650b a try.
I was thinking of using 700c with fenders for winter, taking fenders off and swapping out wheels for 650b in the summer.
But is there any point in having 2 wheelsets? I’ve got my CAAD10 for good weather so this would be used for basically anything else, winter, gravel, canal paths and such.