I used to be religious about inflating to the pressure on the sidewall, but now, thanks to the sources you cite and long experience, I know there is more to the story. That said, I'll buy the app, and enjoy obsessing all over again!
On Thu, Jul 12, 2012 at 1:45 PM, Allan in Portland <allan_f...@aracnet.com>wrote: > A little shameless self-promotion. Hope people don't mind... > > I suspect a number of the active posters to the list know this > already, but for newer folks and lurkers, a few years ago Bicycle > Quarterly published some research conducted by Frank Berto (he was the > Bicycling mag tech editor, way back when they had tech) that showed > about a 15% sidewall drop was the optimum trade-off between tires that > were pumped too hard and would lose energy to road imperfections and > tires that were too soft and would feel sluggish and be prone to pinch > flats. > > Philip Williamson took the graph from the article and put it into a > google spreadsheet which he maintained over the years. In a blog post > he mentioned it would be cool to put it in an App. A friend and I had > just started a company doing Apps, so we thought it would be a cool > first project we could knock-out and get our feet wet ahead of > schedule than what we could do with our original product plans (K-8 ed > apps if anyone's curious). > > We got it posted to the Amazon Marketplace on Monday and I thought > some folks on this list might find it interesting and/or useful. > > Philip's post with some more background on tire inflation: > > http://www.biketinker.com/2010/bike-resources/optimal-tire-pressure-for-bicycles/ > Amazon market URL: > http://www.amazon.com/Edison-Gauss-Publishing-Pressure-Calculator/dp/B008J0YAHM > Google Play URL: > https://play.google.com/store/apps/details?id=com.edisongauss.bertotirepressure > > Finally, I feel I must mention a few words about the price. With so > many free and 99 cent apps, what the heck are we charging $2.50? Well, > I expect the market for this is going to be rather small. The usual > approach of giving it away and making it up on ad volume won't work. > Plus, I hate the ads in so many of the free apps. Not having ad's junk- > up the screen is worth a couple bucks to me right there. Also, we put > about as much time into testing this as we did into developing it. > It's not the typical buggy, crash-prone free App that a lot of guys > crank out as fast as they can and throw up on Google the first time > they get something that compiles. Philip did some great work on the > graphics and IMHO it's an absolute pleasure to look at and use. Is all > that worth one less pint of a nice micro-brew the next time I'm > enjoying a post-ride pub stop? I think so. :-) Hope others agree. > > Riv content -- Philip and I use it to inflate the tires on our > Quickbeam & Hilsen respectively. :-) > > Thanks and regards, > -Allan > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > To unsubscribe from this group, send email to > rbw-owners-bunch+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rbw-owners-bunch?hl=en. > > -- Bill Gibson Tempe, Arizona, USA -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
