Front cold
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Add a front axle weight and the fitted tyre
Use this when you’ve fitted a different size to the ones that came on the van.
The usual recommended pressures are usually on a sticker inside the driver’s door. Those match the original factory size, not a replacement size.
Enter the tyre specification information found on the sidewall of the tyre. Add front and rear axle weights in kg from a public weighbridge (best — today’s weight), the Payload calculator (an estimate), or the VIN plate (often axle maximums, not today’s weight).
How to use
- Use this when your tyres are a different size to the ones that came on the van. The usual pressures are usually on a sticker inside the driver’s door — those match the original size.
- Enter the tyre specification from the sidewall (fields start empty; a faint example is shown in the box, such as
225/75R16C 118R). - Add front and rear axle weights in kg from a public weighbridge (best — today’s weight), the Payload calculator (an estimate), or the VIN plate (often axle maximums, not today’s weight).
- Read cold front and cold rear in bar and PSI. If your size or load index isn’t covered, the tool refuses — no guessed pressure.
- See Sources we use — that box names the manufacturer tables we use.
Headline answer
Cold inflation
Detecting tyre family…
Rear cold
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Add a rear axle weight and the fitted tyre
01
Tyre you fitted
Enter the size printed on the tyre you fitted. The sticker inside the driver’s door matches the original size, not a replacement size.
The size printed on the tyre — for example
225/75R16C 118R
Type the brand so we use the right table (for example Michelin or Continental).
Second number on 120/117 — used only for dual wheels
Shown only for some van C tyres we do not have a full table for.
Rear tyre
02
Axle weights
Enter front and rear axle weight in kg — from a public weighbridge (best — today’s weight), the Payload calculator (an estimate), or the VIN plate (often axle maximums, not today’s weight). This is weight on each axle, not payload remaining. Do not use the V5 for these figures.
kg on the front axle
kg on the rear axle
Estimate from total laden weight + front/rear split %
Only if you do not have per-axle weights. Turns a total kg and a front % into axle weights — still an estimate.
% on the front — rear is the rest
Helper
Bar ↔ PSI converter
Unit converter only — it does not recommend a pressure.
Helper
Save these figures
Optional notepad for the calculated cold pressures. Saved on this phone only.
Front
Rear
Nothing saved yet.
Tyres FAQ
Where do these motorhome tyre pressures come from?
From published manufacturer tables, not guesses. See Sources we use for the tables we cover today. If your size, brand or load index is not listed, the tool refuses a number.
Which brands do you have tables for?
Today: Continental / General (listed LT, C and camping CP sizes) and Michelin (Agilis CrossClimate C and LT, plus CrossClimate Camping CP where we have a matching camping row). If your size or brand is not listed, this page refuses a number.
Why don’t you use a US lb/PSI chart or a generic van-tyre formula?
Those do not match the published tables for the tyre you fitted. This page reads the manufacturer table for that size and load index. It will not invent a pressure from a US chart or a one-size-fits-all formula.
Motorhome tyre pressure — cold or hot?
Use the cold figures. Cold means the van has been parked for a few hours, not just off a motorway. Do not let air out of a hot tyre to match this page.
Why isn’t my door-sticker pressure right for new tyres?
The sticker inside the driver’s door matches the original factory size. A different size needs a pressure from that tyre’s published table at your axle weights.
What if the tyre cannot carry the axle weight?
This page shows a fail and will not suggest a pressure if the axle weight is over the last published step. Fit a higher-capacity tyre, or lose weight.
What does CP mean on a motorhome tyre?
CP is a camping / motorhome tyre — not a plain C van tyre. On a rear axle with two tyres we never show less than 5.5 bar, even if the table step is lower. Front stays on the table.
What does the load index 120/117 mean?
Those numbers on the sidewall are load indexes. The first figure is for two tyres on the axle. The second is only for dual wheels (four tyres). We will not silently use a different number.
Is this a substitute for a tyre fitter?
No. Planning estimate only. Confirm with the tyre maker’s published chart and a fitter. If the size is outside the tables on this page, it refuses to invent a number.
How does this sit with the payload calculator?
Use the payload calculator for MAM and kit. Use this page once you know (or estimate) axle weights and have fitted a different tyre. For axle weights: a public weighbridge is best; the Payload calculator is an estimate; the VIN plate often shows axle maximums, not today’s weight. Do not use the V5 for front and rear axle weights.
About
This tyre pressure tool sits on the Motorhome Payload hub. Enter the sidewall of the tyre you fitted and your front and rear axle weights to get cold pressures in bar and PSI. Your figures stay on this device — nothing is sent away to calculate. We only use published manufacturer tables for the brands and sizes listed under Sources we use; if your size or load index isn’t covered, the tool refuses a number rather than guessing. This is a guide — check pressures cold, don’t exceed the wheel’s maximum air pressure, and ask a tyre fitter if unsure.
Privacy
No account and no advertising cookies. Numbers stay in this browser’s local storage. Nothing you type here is sent to the payload lookup server.