Regarding Tom Forbes' question " ...were GB bars ever available in 44-46 sizes?...I need an alternative to my 38's on my "74 Raleigh Pro...."
I will answer with what was available around 1974, since you can install wider handlebars of later vintage of any brand. The 1975 Holdsworth Bike Riders Aids catalogue lists handlebars from Giro de Sicilia, Fiamme, Allez, Birmalux, Cinelli, and GB, with none wider than 16 inches (40.6 cm). For its widest handlebars, the 1966 GB catalogue lists its Capoberta bend at 16 inches wide and one of its Touring bends at 17.5 inches wide. The 1973 GB catalogues lists the Randonneur bend as its widest at 16.5 inches.
Peter
Peter Brueggeman
La Jolla California USA
4peebee(at)peterbrueggeman.com