24 on a crop body may not be wide enough.
A couple of other tips on Paris (as I found it!)...
It smells like a multi storey car park stairwell, with a hint of sewers on many of the streets as a bonus.
The shady walk up to Sacre Coeur was haunted by fairly aggressive charity beggars who (claimed to be) were deaf and wouldn't give up. They had minders with them and you wouldn't want toi mess with the minders!
There were No Photography signs up inside Sacre Coeur, although I'm told that's the exception rather than the normal rule - maybe there was a service of some sort going on?
The little green man at pedestrian crossings seems to mean cross with caution! You (as a pedestrian) may have priority but you'll still lose any argument with a bus, car or bike.