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


Nov
27
comment Why aren't Tour de France riders going any faster?
@JFA Ah got ya! Of course the two are not mutually exclusive! Will do when I get some time ...
Nov
26
comment Why aren't Tour de France riders going any faster?
@JFA good point! This could be a foray into a new academic field :-)
Nov
25
comment Can bicycling cause runner's knee?
Also important that if you move to using cleats, that you ensure that the cleats are positioned correctly for you. Unfortunately the only way I know to do this is through trial and error!
Nov
25
comment Why aren't Tour de France riders going any faster?
@JFA average over the duration of the 3 weeks of the tour. I don't think top speeds are available. R.Chung did a lot of analysis of the effect of distance below, but I didn't think that was conclusive (in fact, when you factor out difference, the average speeds have changed even less!!)
Jul
22
comment Why aren't Tour de France riders going any faster?
Actually I think this might be hitting the nail on the head. And cudos for submitting code! I've made this the accepted answer.
Jul
22
comment Why aren't Tour de France riders going any faster?
Useful info ... but you're sort of just saying what I said in the question! What are your conclusions?
May
28
comment Why aren't Tour de France riders going any faster?
I'm not sure the data supports you there! Eddy Merckx, 1967, 44.8 kph, Simon Gerrans, 2012, 42.6 kph. Eddy's bike (velo-pages.com/main.php?g2_itemId=39422) ... steel frame, toe clips, limited gear range, heavy non-aero wheels. Simon's bike (greenedgecycling.com/bikes/scott-foil) ... Scott Foil, 50mm deep carbon rims, shimano di2 digital gear shifters, stiff and aerodynamic ....
Jan
25
comment Why aren't Tour de France riders going any faster?
Can you produce a plot of the residual with time after distance has been factored out? Some bounty will wing it's way over if you can ;-)
Jan
24
comment Why aren't Tour de France riders going any faster?
Welcome to Bicycles! We're looking for answers with more detail. Please give us some reasons and explanation, not just a one-line answer. A short answer like this with no explanation is likely to be deleted
Jan
24
comment “Proper” cycling posture on a road bike with drop bars?
You might want to look at saddle position too - i.e. fore/aft adjustment and tilt (not everyone likes it completely horizontal)
Jan
24
comment Why aren't Tour de France riders going any faster?
Fantastic answer! Although the statement "That there is a still a strong relationship between length of the Tour and overall speed simply means that the organizers haven't completely compensated for the distance effect with increased difficulty" is perhaps a little strong, as it implies that the distance effect is the main effect at work here? But overall, the flavour of this seems to be that once you factor out race distance, all of the technology etc has made even less difference! Wouldn't it be great to send them all out on 60's bikes and see what happens!
Jan
21
comment How do I calculate the power required to climb a hill at a given cadence?
Ah but stamina is related to the different energy systems in the body ... doesn't necessarily mean that the power output is different!
Jan
20
comment How do I calculate the power required to climb a hill at a given cadence?
@Jefromi Good idea!!
Jan
20
comment What to do if you are about to get doored?
@heltonbiker I think the Peugeot tried that, but the extra weight made the car a pig to drive. Maybe all cars should have gullwing doors
Jan
20
comment How do I calculate the power required to climb a hill at a given cadence?
@heltonbiker I don't think that's right: I think the energy required is the same, it's just that the body has different systems that work at the two different cadences (slow/fast twitch muscles), which use different energy systems in the body. The result is a difference in psychological effort, not physiological effort.
Jan
20
comment How do I calculate the power required to climb a hill at a given cadence?
:-) Well actually there is some evidence (can't find the reference right now) that the reverse is true: performance follows the circadian rhythm, and peak performance is actually around 6pm for most people. Although obviously not if you've already done a session in the morning!
Jan
20
comment Why aren't Tour de France riders going any faster?
Nice! Doesn't really answer the question though ... in fact it makes it even more surprising that they went so fast 50 years ago (or aren't going faster now)!
Jan
20
comment What to do if you are about to get doored?
I was unlucky enough to get doored once. Thankfully the car in question was a (new style) mini and they don't have anything surrounding the glass at the top, so I went through the glass head first and ripped the door off the hinges. My hands were fine - I had gloves anyway. In the moment I'd managed to unclip but the bike still tangled with me. There wasn't anything I could have done to avoid it (busy road in central London), and there was no time to react whatsoever. I was lucky enough not to be hurt seriously. If the car has a normal door frame, serious head injuries would be more my worry.
Jan
19
comment Why aren't Tour de France riders going any faster?
Fair points, but the measure here was the overall winner's total time, not the winner of each stage. And besides, on flat stages that come down to sprints, usually the top riders all get the same time as the sprinters.
Jan
19
comment Why aren't Tour de France riders going any faster?
There is some truth in this. However from watching the tour over the years, I can only remember a few stages where there was not a breakaway. And sure, the peloton keeps them at arms length, but it always seems like the breakaway riders are giving everything, so the overall speed should be higher. Do you know when race radio came in?