The front isn't anything to do with the frame, it's the forks. But that's not a problem as you say.
Depends on the frame how structural the brake/stay bridges are. It might be risky with a frame with skinny seat/chain stays. Photos will help answer that.
Skinnier tyres? Not all 23mm tyres are 23mm.
Also a wider rim will mean the tyre will protrude less.
The front isn't anything to do with the frame, it's the forks. But that's not a problem as you say.
Depends on the frame how structural the brake/stay bridges are. It might be risky with a frame with skinny seat/chain stays. Photos will help answer that.
Skinnier tyres? Not all 23mm tyres are 23mm.
Also a wider rim will mean the tyre will protrude less.