Talk:2015-10-31 47 9

I wish you good luck with your first hash! Have fun! - RecentlyChanged (talk)

Thanks I guess. It was fun. I will probably be doing this again. I hope I am doing a reply right. Lysogeny (talk) 08:15, 1 November 2015 (EST)

Nice Adventure! - Phi-loci-raptor (talk) 18:00 EST, 1 Nov 2015

This is the true spirit of Geohashing! Keep going. Palmpje (talk) 13:09, 3 November 2015 (EST)

Wow, a great adventure and nice biking job! You really rode up 18 % gravel incline? Very nice. Btw, 3,7 bars on 54 mm (estimate based on pictures) Nobby Nics sounds quite a lot. You sure your rims will withhold that much pressure? Also, the rolling resistance will probably increase a bit compared to lower pressure when riding on uneven surfaces. Have you read the recent discussion about tire width, pressure and rolling resistance? [Here] is an excellent account about those. To sum that up in a few words, wider tire rolls better than a narrow one, and higher pressure is not always better, the optimal pressure depends on how rough the riding surface is. Tilley (talk) 01:54, 4 November 2015 (EST)

Well, I did take asphalt roads for most of my trip, that's why I raised the pressure to 3.7 bars. That's the maximum they also seem to be rated at. I did not know the bit about rolling resistance having a more complex relation with tire pressure than a linear one. Judging by that the higher pressure still seemed to be the right choice for my (mostly) road route. Lysogeny (talk) 10:38, 4 November 2015 (EST)

That's ok then. Here where I live, there are lot of gravel roads and in those optimal pressure certainly isn't the largest pressure possible. The myth of greater pressure always rolling better is based on testing on too ideal rolling drums in laboratory. Also in the velodrome the surface is very smooth and there higher pressure is better. In real road conditions the testing was very difficult before the arrival of watt-measuring cranks, so the tide is only turning just now. Tilley (talk) 02:45, 5 November 2015 (EST)