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  1. Aluminium rims are made by extruding a very long coil of aluminium rim, and it’s then cut to pieces and the ends are joined. So they always have a seam, and on cheaper rims it can look pretty rough.

    The seam is really only a problem if it’s bad enough to affect braking. But it’s almost never a structural problem because you have a lot of spoke tension holding the seam together.

    That surface finish looks really rough though, but maybe it’s a DIY paint job that was done poorly?

  2. if the seem is flat, theres no problem, if it isn’t you might want to file it flat so it doesn’t wear the brake pads, that’s it,
    the seam won’t split if that’s your concern, it has some steel pins joining them, i’ve seen many rims with visible light coming through the seem and it was strong as any wheel, cheap wheels are all like that

    just watch out for cracks developing in this area. specially if it’s a front wheel, if you see one just change it

    https://preview.redd.it/bll96mq8ixqe1.png?width=543&format=png&auto=webp&s=b4113a813db89059db3247d1872ece15fba5b083

  3. Honestly, it shouldn’t be that big a deal. Just as long as you always ride with a goalie mask and possibly even goalie pads. Otherwise I wouldn’t worry at all!

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