Ian Welkins
I build and maintain Bike Speed Calculator — the tools, the methodology and the checking behind them — from Houston, Texas.
- Builder and maintainer of this site
- Every formula traced to a published source
What I do here
I write the calculators on this site and stand behind their numbers. That means choosing models with published sources — the Martin power-balance model for watts and speed, standard gearing conventions for the gear tool, the erg maker’s own cubic for indoor watts — computing reference cases by hand, and pinning them in tests that run before anything ships. The full method is on the methodology page.
My side of the bargain is simple: if a number here is wrong, tell me through the report an error page and I will fix it and say what changed, under the site’s editorial policy.
Find me
GitHub · Dev.to · About.me · Gravatar · ianwelkins@gmail.com