480 reputation
1518
bio website tomdiethe.com
location London, United Kingdom
age 37
visits member for 2 years, 10 months
seen Oct 20 at 12:16

Software Engineer, interests in Machine Learning and Computational Statistics


Jan
18
awarded  Popular Question
Jan
17
comment Why aren't Tour de France riders going any faster?
@thiton edit your answer a bit, and I'll +1 it!
Jan
17
comment Why aren't Tour de France riders going any faster?
@ColinPickard interesting! although whether or not measurements from the oceans can be extrapolated to continental Europe is another question ...
Jan
17
comment Why aren't Tour de France riders going any faster?
Reasonable points, but we're not comparing one year to the next, we're looking at trends over decades. And actually the graph is pretty smooth considering all those factors. I would also argue that the overall conditions (weather, course difficulty) tend to average out over 3 weeks to a great extent, so it's not the same as something like the 100m where the wind can mean that average runners break the world record.
Jan
17
comment Why aren't Tour de France riders going any faster?
@StephenTouset so what do we surmise from this - that bike technology hasn't really moved the game on that much? That if we could (hypothetically) have a tour with 1960's machines, the racing would basically be the same, give or take a few minutes? And what of all of the "advances" in training methods, nutrition, etc ...?
Jan
14
awarded  Nice Question
Jan
13
comment Why aren't Tour de France riders going any faster?
Err I think you want to look at this video of the 2009 record ... not really a bike is it?
Jan
13
comment Why aren't Tour de France riders going any faster?
Surely this averages out ... and isn't all the aero equipment (and I don't even mean on TT bikes - look at the claims Zipp makes for its Firecrest wheels, plus there's tighter fitting clothing) supposed to mitigate the effects of the wind?
Jan
13
comment Why aren't Tour de France riders going any faster?
Not sure if the data on TTs is available, but yes that would be interesting, although I don't think there were TT specialists in the past like there are now (perhaps the TT times of the overall winner would be fair). Regarding the weight, as I put in a comment above I don't see the weight of the bikes as the only factor in the technology, but yes this is probably the main limiter for climbing speed (other than stiffness)
Jan
13
comment Why aren't Tour de France riders going any faster?
@jv42 this is a fair point, except that earlier editions of the tour were disproportionately harder! For example in 1919 (the slowest tour) the total distance was 5560km, compared to 3430km last year, and although I don't have stats on how much climbing they've done each year I don't think it's changed a lot since they introduced the mountains. Also note that rest days were only introduced in the late 60's
Jan
13
revised Why aren't Tour de France riders going any faster?
added images
Jan
13
comment Why aren't Tour de France riders going any faster?
I'm still surprised the differences aren't bigger, but yes I agree, we do seem to be reaching an asymptote. Maybe the question is "How did they go so blinking fast in 1960!?" (37.2kp/h, vs 39.8 last year)
Jan
13
comment Why aren't Tour de France riders going any faster?
The last point is interesting, but sure it's not just weight: what about tyre technology, better brakes (for the downhills), clipless pedals, carbon semi-aero rims, super light climbing wheels, carbon-soled shoes, aero-tubing on bike frames, concealed cables etc etc etc. And not to mention better (smoother) roads!
Jan
13
comment Why aren't Tour de France riders going any faster?
Agree with the first point (the cube law of resistance) to a degree. However it's missing the fact that the overall leader (who's time we're looking at) will spend a huge amount of time in the bunch or surrounded by teammates, or otherwise climbing where air resistance is less of a factor. In fact since team tactics have become so important, I would say that this should be the case now more than ever! As for the second point, yes this is true to an extent, but in the 60's they really had no idea about training routines (build/taper phases etc), or correct nutrition (steak for breakfast???)
Jan
13
awarded  Commentator
Jan
13
asked Why aren't Tour de France riders going any faster?
Jan
13
comment FSA GOSSAMER ROAD CRANKSET with BB7800?
Afraid not ....
Jan
13
answered FSA GOSSAMER ROAD CRANKSET with BB7800?
Jan
13
comment Online turbo / spinning resources
Not seen those before - look pretty good actually. $12 a video isn't that bad actually ... might give it a go myself
Jan
12
comment Online turbo / spinning resources
re powerblast ... that's why I've not tried them myself!