iveto1983":19ebr8bh said:Looks like a Hope or Royce tool will fit, or a pin spanner.
I have tools you could borrow, if you wanted.
CTK":318vjxzh said:You remove the outer ring on one side then the whole lot slides out from the other side. Its a threadless bottom bracket. Pin spanner is the tool to buy or you could try and turn the outer ring by wedging a bit of hard wood in one of the notches and hitting it with a mallet.