Minion

Road latex inner tubes with removable valve cores.

Who decided to paint it in the JMPD colours?

It comes with freestyle paddles? Does it float?

Maybe give them a call: http://www.gauteng.net/attractions/entry/suikerbosrand_nature_reserve/

Rather which sealant to go with the bombs. As far as I know, all bombs are CO2, so they're all the same.

It depends on the tubby, but normally yes.

I'd also like to know.

Usually W/kg figures are quoted in terms of body weight only. If you want to compare predicted climbing speeds and so on, you'd need to use total weight (including bike etc.)

I believe the 80-90% thing is pretty consistent. It's more likely that your max heart rate is higher than you've calculated and you're actually sitting below 80%.

http://openmtbmap.org/ Open source MTB map that contains some topo data. The site also has instructions for loading it onto the SD card.

Edge 800 is only the head unit. Performance bundle adds HR strap and speed/cadence sensor. Performance and Mapping bundle adds maps to that.

These values are ones that were published by Dr. Andrew Coggan for functional threshold power (maximum power that can be sustained for a 1hr time trial). The 20min test is one of the ways of estimating FTP (FTP is taken as 95% of the power in a 20min test). Coggan rates MAP testing as providing an equivalent estimate for FTP as the 20min test method. You can read how Coggan compiled the list, as well as see lists for maximum power over 5min, 1min and 5s here: http://home.trainingpeaks.com/articles/cycling/power-profiling.aspx

Activeworx in Gauteng claim to do something similar with their setup: http://www.activeworx.co.za/DisplayCustomLink.aspx?name=Services%20Bike%20Fit%20RAD%20Cleat#

This is what the ANT+ Alliance is trying to do. A lot of major manufacturers are part of this, but Polar is notably absent.

Both of these methods will give a circumference estimate that is about 6-12mm too big. Ideally you need to do the roll-out test when you're sitting on the bike since compressing the tyre reduces the effective diameter and hence the circumference.

I've found they are reasonable for solo rides where there's not much wind (and provided you put in an accurate weight), but are completely nuts when you start including bunch riding and wind. I found the estimate was within 15% (under and over) for the previous case, but overestimated power by 50% or more for races etc. where there was lots of bunch riding.

Pace = 1/Speed They're different ways of measuring the same thing. Just like fuel consumption can be measured in L/100km or Km/L. Improving your pace requires the same amount of effort as improving your speed. If by upping your average pace, you mean increasing it from 5min/km to 6min/km, then yes, it is easier than increasing your speed. Just slow down and your pace will go up.

I'm using a power meter. As far as I know, if it shows a little lightning bolt next to the average power number, it means the power track was imported (probably from a PM), rather than calculated.

I'm neither brute heavy , nor am I able to stay with the group on the climb But for what it's worth: http://app.strava.com/rides/5072352 (you needed to be logged in to Strava to view it)

Only if you're going fast enough at the front for aero drag to be a major factor.

To stay with the bunch on a climb you just need to put down the same W/kg as the guy next to you. If the 65kg guys is putting down 300W, the 90kg guy needs to produce about 405W.

Average what? Do you want to know how fast you're going while you're riding or how fast you went on a ride after it's finished? Pace will tell you how fast you're going, average pace will tell you how fast you've been. Same for speed and average speed. Both can be used to track progress. Pace emphasises changes at low speed (going from 4km/h to 5km/h changes pace from 15min/km to 12min/km), but loses resolution at high speed (going from 31km/h to 34km/h, pace only changes from 1.9min/km to 1.8min/km). You generally use pace to track slower sports, such as running or rowing, while speed is used for faster sports like cycling. Current pace is easy to measure with just a stopwatch and known distances (e.g. mile markers, laps, lampposts etc.). Current speed needs some extra calculation if you're not using a speed/distance sensor.

My girlfriend was given the exact opposite advice when she was starting out. Get the cleats straight away and avoid having a second transition period later on. She was also told to find a nice grassy field and just ride around it while practising stopping, unclipping and clipping back in. She became confident with the cleats and their use pretty quickly this way.

I've seen a USB/phone charger thing that ran off AA batteries. I think it was by Energiser.

If only he'd included a reference to HItler or the Nazis. Then it could have been even thinner.