Ideally its for frames 56cm upwards, but it may fit a 54cm frame, but it all depends on the length of the top tube.
I already own a medium Restrap frame bag, but I was convinced that the large would give me that extra litre of carrying capacity. Ignoring the fact that the Restrap web site measurements suggested that it would not provide the best fit I still went ahead and purchased it! To be fair, it does fit my 54cm frame but its just a fraction to long so the material tends to "ruck" a little bit in the middle. Yes I know, I should have taken note what Restrap suggested.....doh!!
Made in the UK and carries a lifetime warranty against faulty workmanship.
Sell for £70
This is it fitted to my 54cm frame, as you can see, annoyingly its just that little bit to long
