SKS Chromoplastic are the only ones I can find that are specifically listed (by SJS) as being suitable for 27" wheels.
The difference in the radius between a 700c rim and a 27" rim is about 4mm. If that's going to be an issue then you don't have enough mudguard clearance!
P.S. I'm using Giles Berthoud 40mm mudguards on my 27"-wheeled Galaxy, but then I'm running it with 700c wheels and 28mm tyres.
The difference in the radius between a 700c rim and a 27" rim is about 4mm. If that's going to be an issue then you don't have enough mudguard clearance!
P.S. I'm using Giles Berthoud 40mm mudguards on my 27"-wheeled Galaxy, but then I'm running it with 700c wheels and 28mm tyres.