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R RiderCalc

About

About RiderCalc

A small, independent reference site for the math riders actually run.

What this site is

RiderCalc is a focused collection of motorcycle calculators — loan payment, gear ratio, tire size, chain length, and wind chill — built around one rule: publish the formula, don’t hide it. Every result page shows the equation it used and a worked example with real numbers. If something looks off, you can audit the math yourself.

Who runs it

RiderCalc is a one-person, ad-supported project — not a nonprofit, not a venture-backed startup, not a dealership. Calculators are built by an engineer with a software-engineering background who rides. We make calls to a mechanic and to a finance professional for review on edge cases.

How we make money

Three sources, in order of importance:

What we won’t do

Found a bug?

Math errors in our formulas are the worst possible thing that can happen on this site. If you spot one, please report it through the contact link in the footer. We treat formula correctness reports as critical bugs and patch within 48 hours.

RiderCalc estimates are reference tools, not professional advice. Verify with your owner’s manual, dealer, mechanic, or licensed financial advisor before riding or signing anything.