Tools

Bike tools that give a straight answer

Four calculators built on published data: the frame size for your height, the tyre pressure for your weight, what a used bike is worth in the UK, and what Cycle to Work saves once the ownership fee is counted. No sign-up, and the working is shown under each one.

Bike size calculator

Enter your height and inside leg and get a frame size for a road, hybrid or mountain bike, a wheel size for a child, or a fit check for a Brompton.

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Tyre pressure calculator

Front and rear tyre pressure in psi and bar from rider weight, bike weight and tyre width, for road bikes, hybrids, e-bikes, cargo bikes and Bromptons.

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Bike value calculator

A private sale range, a likely sold price and a trade-in figure from UK market data, by bike type, age and condition.

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Cycle to Work calculator

Income tax and National Insurance saved on a Cycle to Work bike for the 2026 to 2027 tax year, with the HMRC ownership fee included.

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How they are built

Published data, not guesswork

Each tool states its method and links every source: UK retailer size charts, Frank Berto's tyre drop measurements, Cyclesite's UK depreciation index, and HMRC and GOV.UK rates for the current tax year.

Where the sources disagree the tool shows a range rather than a false single figure, and where a figure is a rule of thumb it says so. The results are estimates to plan with, not a fitting, a valuation or tax advice.

Need a mechanic instead?

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