Wheels & Tyres Calculators

Tyres are the single most important contact point between you and the road, and getting your setup right for UK conditions makes a measurable difference to comfort, grip, and speed. British roads are often rough, wet, and strewn with debris — especially in autumn and winter — which means tyre choice and pressure matter more here than in many other countries. Our tyre pressure calculator takes your weight, tyre width, and riding conditions into account to recommend pressures that balance rolling resistance with comfort and puncture protection, rather than simply inflating to the maximum sidewall pressure.

Wider tyres have become the norm on UK road bikes, with 28 mm and 30 mm now standard where 23 mm was once ubiquitous. The tyre clearance calculator checks whether a larger tyre will fit your frame and fork, while the rim width calculator identifies the optimal internal rim width for your chosen tyre size — an important pairing that affects tyre profile, cornering grip, and aerodynamics. For riders switching to tubeless, the tubeless sealant calculator tells you exactly how much sealant to add for your tyre volume, and the tyre rolling resistance calculator lets you compare different tyre models to find the fastest option for your riding.

For those building or upgrading wheels, the spoke length calculator and spoke count calculator are essential workshop tools. The spoke length calculator uses your hub and rim measurements to produce accurate lengths for any lacing pattern, while the spoke count calculator helps you choose between 24, 28, 32, or 36 spokes based on your weight and riding style. The wheel weight calculator totals up hub, rim, spoke, and tyre weights to show the full rotational mass of your wheelset — useful when deciding whether that upgrade is worth the investment.