Sam's correct about the purpose of the cut-outs, but I was never convinced. The seat post seals the seat tube and you would have bolts in the cage bosses. Water from the front wheel will spray into the BB shell in wet conditions and then, great, then it will drain out again (after soaking your axle).
Oh and look, the forecast is for rain in London on Saturday and Sunday.
Sam's correct about the purpose of the cut-outs, but I was never convinced. The seat post seals the seat tube and you would have bolts in the cage bosses. Water from the front wheel will spray into the BB shell in wet conditions and then, great, then it will drain out again (after soaking your axle).
Oh and look, the forecast is for rain in London on Saturday and Sunday.
Did someone mention food? Is it lunchtime yet.