I was delighted with the 110mm/74mm BCD Sugino mountain triple I put on the Peugeot PKN-10. I wanted close-ratio gearing and a short-cage derailleur, but I wanted a somewhat lower gear than on my other bikes. My favorite combination was 48-45-34 / 13-15-17-19-21-23, which gave me 15 or 16 usable closely spaced ratios from 40 to 100 gear-inches. I know lots of you disagree with me on this, but I have no use for any gear over about 100 gear-inches, and my current fleet has top gears of 93.5, 94.5, 96, and 98 inches. After I gave him the Peugeot, my son wanted a higher top gear and a lower bottom gear, and he had issues with skating the chain on the half-step chainrings, so I changed it to a 21-speed with a36-to-108 range: 52-45-34 / 13-15-17-19-21-23-26. It doesn't have the smooth ratio progressions I favor, but it gives him the range he wants. The rear cogset would work well with my mountain bike's 48-40-24 ringset, for those who want a lower range of gears.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069