that ridin' a fixed gear 65 km is equal to ridin' a gear 100 km fitnesswise all things bein' equal. ya'll prolly knew that or somethin' like that cause it makes intuitive sense. Edward Borysewicz that is. i was readin' his classic book on racin' last night and that's where he says it in no uncertain terms. in fact, eddie b rarely says anything in uncertain terms. even if yer not into racin', his book is great.