Blog: 2015

11 Aug 2015

Visualizer updates


I posted a small update to my spoke tension visualizer based on user feedback.

This update supports the numeric keypad for data entry, which was an oversight in previous versions. I have a few computers but none with a numeric keypad so please let me know if I missed the mark. For tablet and phone users the onscreen numeric input mode is now presented by default, which saves a mode-switch for every spoke (thanks to David M. for the suggestion). Last but not least, input validation is less restrictive so you can use hotkeys for cut, paste, print, etc. while editing.

I also re-tooled the setup screen to allow two kinds of bladed spokes: 0.90×2.2mm and 0.95×2.2mm. These are for Sapim CX-Ray or DT Aerolite spokes and the correct choice depends on the exact measurement of your batch of spokes. Sapim says nominal CX-Ray thickness is 0.90mm, which is a fine way to go by default, but some people find theirs closer to 0.95mm. This isn’t a huge deal because the point of visualization is to show relative differences, which are independent of scale.

Since you’ve read this far I’ll point out a couple features that may not be obvious. First, you can hover your mouse over any point on the graph to see the conversion from deflection to tension. Second, you can save your work by using the File > Print function of your browser to make a hardcopy or save as PDF on some systems. Mac users have a PDF option in the lower left of the print dialog. I’ve done a fair amount work to strip my site headers and footers so the resulting document looks nice and can be shared with customers if that’s your thing. Note: your browser may add unwanted headers and footers but these can usually be suppressed in browser settings (try Print or Page Setup menus).

Suggestions welcome. I don’t work on this tool often but keep track of requests so they can added when time permits. What would you like? More spoke choices? New ways to save graphs? A way to link to completed graphs? A publish to Facebook or Instagram feature? Other tensiometers?

10 Apr 2015

Carbon clinchers


As a rule I don’t recommend carbon clinchers for rim brake applications. Carbon clinchers for disc brakes are a different story. Check out this recent build of carbon rims to Hope hubs:

21 Mar 2015

All terrain wheels


This year I’ve built two sets of Rolhoff wheels using different models of Surly fatbike rims. Coincidentally both wheelsets are headed for epic adventures in Australia: the first set is headed for Tasmania and the second to the Canning Stock Route in Western Australia.

Happy spring!

16 Feb 2015

Tire check every time


Sometimes it’s the simplest things that get overlooked. When mounting tires, are you checking the bead is seated evenly? All the way around? On both sides? Not pinching the tube?

If you care about true wheels, you should care about true tires. You should give this topic special consideration if you run tires with supple sidewalls (e.g. Compass/René Herse) and it’s mandatory to ensure your tires are well-seated for stable tubeless applications.

Last month I replaced a worn set of tubeless tires with fresh rubber and overlooked the bead not being seated evenly in one spot. I achieved a tubeless seal so surely everything was fine? No — over a span of a few centimetres I allowed the bead to fold under itself. It was immediately obvious that alignment was lost because a big wobble developed in the rim. I inspected it in the truing stand and the wheel was physically out of lateral true by over 2mm! I pulled the tire off and the wheel sprung back to fine form with runout less than 0.2mm (that’s also low spoke count wheels for you).