Any problem with drilling drain holes in rim?

Nick Payne
Nick Payne Posts: 288
edited May 2017 in MTB workshop & tech
I have a pair of wheels build up with DT Swiss XM401 rims. After a recent ride which had a few creek crossings, there was a considerable amount of water sloshing around inside the rims, and it was still there a couple of days later. Is there any reason why I shouldn't drill a couple of holes in the "V" part of the rim so that water can drain out (i.e. just below where the brake track would be on a rim brake rim).

I notice that the Dura-Ace C24 wheels on my road bike come from the factory with a couple of ~1.5mm holes already drilled in the rim just below the brake track, presumably for this purpose.

Comments

  • The Rookie
    The Rookie Posts: 27,812
    Just let it dry out, its rarely a good idea to remove material from somewhere it's meant to be!
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • fenix
    fenix Posts: 5,437
    If the factory havent put them in - there may be a reason. LEave as is.
  • Arthfael
    Arthfael Posts: 30
    Also keep in mind, a hole would work both ways!

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