Old Ned
Old School Grand Master
151BCD is the original Campag chainring size from when they first started making chainsets. Smallest available is 44 (BUT - they did make a few 43's but rocking horse excrement is more readily available). They altered the BCD to 144 so that a smaller 42 tooth ring (with a possible 41 potentially available as above) could be used. I also have a pair of 177.5 cranks but they are Pista. However, I have used them with double rings and I have some 'drillium' ones to suit. They are fitted with Campag Pista pedals, toeclips and straps.