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Measuring saddle positions

Rob Equipment, News

The standard method is to measure height from the ground and off-set of the saddle nose from the centre line of the bottom bracket. This works well on a single bike but is not ideal when trying to replicate the back-end geometry between different bikes. Here’s an alternative method that I use …..

Updated Aerolab User Guide ….

Rob Aero Tips

Now available without the need to email …. … and if you are wondering what the illustration is, one of the bar end plugs is a dummy and the other is a toggle switch for my eTap rear mech., both cables are in the same extension, therefore no need for an exposed cable to the blip box.

Boardman Wind Tunnel Experience

Rob Aero Tips, News

Having done extensive “Open Area Testing” at multiple venues, and cross-calibrated them, I’ve always wanted to validate my field-testing results directly with results from a wind tunnel session. The Wind Tunnel at the Boardman Performance Centre has made this more affordable, so I booked a session.

Options for the front end

Rob Aero Tips, Equipment

If you go to an event and observe the riders on time trial machines you will see a wide range of front end positions. Getting the most efficient position for both aero performance and power production is the Holy Grail. In this post I attempt to give some structure to the process of finding that position ….

Test session at Newport Velodrome 28th February 2018

Rob Aero Tips, Equipment, Venue

I book a three hour slot at Newport Velodrome once or twice a year, and use the data to validate my “open field” test results and to refine options. In this session I was benchmarking a 54 P3 with a new configuration of bars and wheels. In parallel I tested some shoe and helmet combinations.

The latest avatar is better

Zwift Workout files

Rob News

If you are doing high end intervals ERG mode isn’t always what you need. There is a way to disable ERG mode in Zwift without having Zwift change the turbo resistance if the terrain changes e.g. the incline changes or you ride over a bit of “feature landscape” like a wooden bridge section. It does mean manually creating a .zwo …

Two venues

Cross-calibrating test venues

Rob Aero Tips

I find it quite useful to have some idea of what my wind tunnel numbers might be. One way to do this is to cross-calibrate test venues with a trace back to a wind tunnel result.

Michelin latex tube

Wheel and tyre comparisons

Rob Equipment

Some pretty basic wheel and tyre comparisons – I’m limited by the availability of wheels and testing equipment, but …..