That’s really interesting. I wonder how much difference the tyres make, I think the Vittoria tyres are a bit faster than the Conti tyres. On a pure hill climb where speed doesn’t get above 10mph I guess weight is more important than aerodynamics, but for a hilly course with ascents and descents then I suppose the gains you make on the flat and descents because of having a better aero bike that’s slightly heavier, outweigh the gains on the ascent due to having a very light bike. You see bike changes in TTs with summit finishes - they change from aero to climbing bikes. Did you have the same clothing and helmet on?
Had exactly same clothing and helmet, the only difference was shoes. On the Cervelo, I used my S-Works road shoes, which are very light and stiff, on the Tarmac I used S-Works Tri shoes with Mid foot cleats, its something I am trying out at the moment
Tarmac pisses all over the Cervelo on the flat, 625 wheels and better aerodynamics. Also, Tarmac descends much faster than Cervelo, the super stiff frame and aggressive geometry make the Cervelo very nervous at speed
It’s been a multi year hobby to see how light I can make a bike without buying new parts. I think that the only “new” items are the tyres, the chain, schmolke handlebar and seat post, everything else is second hand. However, bike has to be rideable, I could go for track tires and aluminium cassette and save 200g, but would end up with a bike that is not useable.
So many factors could affect it. Bike geometry, stiffness, handlebar stiffness, shoes, cleat position, temperature, air pressure, road temperature, amount of food in the stomach affecting how blood is used in the body, small changes in the wind.
Why did you decide to move the cleats back? How has that been going for you? I’ve been wanting to try that to see if it helps conserve and protect calf muscles and Achilles’ tendons… I guess making this change would mean that the saddle has to change height and fore/aft position?
That’s a myth apparently. I can’t remember where I listened to it recently, but if you take a wheel, any disadvantage created by the inertia on one side of the wheel that is rotating, is compensated by advantageous inertia on the other side of the wheel that’s going in the other direction at that same moment in time. So they said it cancelled out, and it’s just the effects of the absolute mass that you are taking up a climb that matters.
TLDR - if you add 1kg to your back pocket, or 1kg heavier deep wheels, the effects are apparently the same*
*purely in w/kg. Having the weight in the wheels is actually better, as it lowers the centre of mass for handling, etc
When I did my ride around Switzerland, I started to suffer from pain in my right achilles, luckily I was able to protect it and only needed a couple of weeks to recover, however, it was an incentive to give mid foot cycling a go.
I am only a couple of weeks into mid foot riding, but so far it is encouraging. I havent experience any ah ha moments, but it doesn’t feel wrong either. I think that on the flat or rolling section on a TT bike riding at 260w @ 70 rpm it feels nice, and possibly a little smoother. On climbs, I am used to ride alot standing, I find that I am sitting a little more, probably 50:50. It does put noticeably less stress on the achilles
Biggest issue is clipping in as cleat is in a different place to what I am used to. There are 2 positions you can use, I have initially decided to go with the less extreme position
I’ll probably give it a go in Challenge Roth in 2 weeks, partly because I want to look after my achilles
Difficult to see from a the low res pictures, no actual broken down power data etc. but it looks like the majority of the time gained was in the bits running south the first 1km did 30seconds, then no realy gain until 3.5km, then the big gain again from 5km.