Originally Posted by
giskard
Thanks, I did think of that, but wanted to avoid the wider rack if possible.
I checked Topeak's website and the width difference between the disc and standard versions of the rack is 6.5cm (23.5cm vs 17cm), so the rack would be around 2.5" wider. Dunno if that'd be an issue given that I'd prefer to keep things as narrow as possible for my commute (squeezing through traffic etc).
No, that won't be an issue, your handlebar is still the widest part of your bike. And if you have disc brakes this is the best rack out there for that.
You will not be squeezing between cars so tightly that 6cm would matter. And if you do, I suggest you rethink you riding habbits before you get hurt.