sciguy wrote:shorter cranks wrote:115mm crank Update
Anyway to my surprise again I haven't noticed any drop in power at all. .
So you're using a power meter and actually measuring your power? How's your mean maximal power at 1 minute, 5 minutes, 20 minutes and one hour compare to the longer cranks?
No I don't have a power meter, although I would like to own one. All my findings are based on my cycle computer's speed and average speeds, most of the time I am comparing my speeds on a 20klm loop I do to work and back that I've been doing for 20 years, so I know the road, my top speeds my average speeds like the back of my hand. Part of the ride has a fairly tough hill that climbs for about 2klm reasonable steep and constant, my good friend said his GPS averaged ihat at 11- 12%, so a good test. I have timed myself many times over the years on that hill, the best time I have ever done is on the 120mm cranks, I haven't timed myself on the 115's yet but 3 days ago I'm almost certain I was faster based on speedo readings the whole way. On that same ride there is a very long flat section about 7klm, that's where I noticed my biggest improvements, I could never hold it much above 46klm on the 175's, but since going below 130mm I can handle 50klm for quite a bit of that distance. Again flat riding holding high constant speeds(TT) is where I have improved the most. Hill climbing is only slightly faster, but seems to be at it's best on 115's. Sprinting top speed I always do on the same section of road(fairly flat and smooth), I have done it many times on the 175's and my highest ever was 56klm, my highest speed on the short cranks is 59klm that was on 130mm cranks, on the 115's my top speed is almost as good 58klm but I can hold it longer at higher speeds. I will say my initial of the mark sprint speed is definitely snappier on the longer cranks like 155mm-165mm.
All my findings are obviously not results down on paper but I have no doubt myself that I am performing considerably more efficient on the shorter cranks(I wont go back to anything longer than 130mm). And as I have mentioned before I don't suffer with chronic low grade pain like I did with the 175's.