Existing
Desired
ResetExample values

Tire calculation and/or rim calculation

Tire size
Warning
1: Existing tire / rim
Tire width?
105 - 405 mm
Tire height
25 - 100 %
Tire height?
20 - 55 inch
Tire width
5 - 15 inch
Diameter
5 - 25 inch
Rim width?
3 - 15 inch
Offset
-165 - 165 mm
Spacer
0 - 150 mm
2: Desired tire / rim
Tire width?
105 - 405 mm
Tire height
25 - 100 %
Tire height?
20 - 55 inch
Tire width
5 - 15 inch
Diameter
5 - 25 inch
Rim width?
3 - 15 inch
Offset
-165 - 165 mm
Spacer
0 - 150 mm
1: Enter values
Information
INFORMATION: The ratio of tire width to rim width does not correspond to the standard!
Warning
ATTENTION: Entries (highlighted in red) are out of range! Please correct your entries!

Results

 Existing
 Desired
Tire circumference
?
Rolling circumference
?
Tire height (sidewall)
?
Tire diameter
?
Rim size
?
Rim width
?
Poke (Outer Edge)
?
Inset (Inner Edge)
?
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Comparison & differences

Circumferential difference
Difference in rolling circumference
?
Speedometer display at real 100 mph or km/h
Speedometer at 100 km/h or mph
?
The following differences also arise:
Difference in ground clearance
?
Change to the outer edge of the rim per side
?
Change to the inner edge of the rim per side
?
Placeholder

Graphic display appears after entering values

The strut illustration is for illustrative purposes only
2: Read the result

Note the difference in rolling circumference:

Rolling circumferences are generally approved in the range +1.5% und -2.5% g. Please check with the responsible inspector beforehand.

Speed deviation outside the norm:

In EU countries, the speedometer may display a maximum of +10 % + 4 km/h and no km/h less than the actual speed driven.
See regulation No 39 of the Economic Commission for Europe of the United Nations (UN/ECE): Point 5.4
Share your calculations

Sarah Arabic Arabian Nights Free ^new^ -

Next, Sarah tells of a tailor who stitched dresses from clouds. The garments floated just above the wearers, keeping them afloat in floods, concealing them when danger came. A greedy magistrate demands such a robe; the tailor refuses and is punished. In Sarah’s telling, the magistrate learns, not by force but by the soft humiliation of seeing his attendants drift away with the robes and his own vanity left heavy and exposed. The crowd laughs, and laughter loosens fear.

When Sarah finishes, the lock on the box clicks and opens. Inside there is nothing but a single seed, black as night. She plants it on her rooftop in a cracked pot. The seed sprouts into a plant whose leaves are pages: each is inscribed with a sentence from a story Sarah has told. The plant does not bear fruit to steal; it offers reading, one leaf at a time, so the city’s tales may be studied, altered, and shared. The magic, she realizes, was never in a chest or charm but in stories that taught people how to live with one another—how to grieve together, how to laugh, how to refuse cruelty, and how to pass on small, sustaining truths.

This tale draws from the Arabian Nights tradition not by copying its extravagance but by echoing its spirit: the belief that storytelling can be both shelter and weapon, that stories can hold danger and consolation, and that everyday courage is as worthy of song as heroic conquest. Sarah is a guardian of ordinary wonders—an advocate for the small, painstaking kindnesses that make a community habitable. Her reward is not treasure but a garden of sentences, offering the same thing every storyteller seeks: an audience changed, however slightly, by what they have heard. sarah arabic arabian nights free

The box beneath Sarah’s mattress remains closed. Each night she adds another tale: a lamp that remembers, a mirror that argues, a city where footsteps vanish unless sung aloud. Her stories are small acts of rescue—comforting the lonely, unsettling the cruel, teaching children how to recognize false promises. They are stitched with the texture of the marketplace: the cadence of haggling, the smell of cardamom, the pattern of tiles, and the patient resilience of women and men who live between sun and shadow.

Sarah’s life continues. The sea still speaks and the market still smells of cumin and metal, but now there is a rooftop tree of pages visible from many corners of the city. People visit not to claim miracles but to learn how to listen. Children tie scraps of their own stories to the plant’s branches; the pages change, rearrange, and sometimes disappear, reminding everyone that stories are living things. Next, Sarah tells of a tailor who stitched

One evening, a caravan of merchants arrives, trailing saffron and frankincense. Among them is a strange storyteller whose voice is rough as stone yet warm as bread. He places a locked box before Sarah and says the lock will open only for one who can offer a story true enough to be believed and strange enough to be remembered. The merchants laugh; they have paid coin for miracles and carry charms against envy. Sarah takes the box home, tucks it beneath her mattress, and begins to tell.

Her final tale is a quiet one. It is the story of an ordinary woman who wakes each day at sunrise and performs humble, careful tasks—baking bread, sweeping courtyards, listening. She does not overthrow kings or find treasure; instead she learns how to notice small mercies: the way bread crisps at the edge, how water tastes in different months, the exact way a neighbor’s hand trembles before a confession. Over years, her attention becomes a kind of magic: people come to trust her, to tell truth, and the community shifts, not by decree but by small acts multiplied. The story ends not with a spectacle but with a street made kinder, one meal shared at a time. In Sarah’s telling, the magistrate learns, not by

Sarah moves like a secret through the narrow lanes of an old port city, where the sea brings voices from distant places and the lamps burn like captured moons. She is not a princess with a crown, nor a beggar with only hope; she is a listener, a keeper of stories. By trade she mends nets and by habit she gathers tales—snatches of sailors’ songs, the hush of women by rooftop fountains, traders’ boasts, and the soft hiss of spice sellers bargaining at dawn. From these fragments she builds a labyrinth of narratives, each door opening onto another world.

Feedback
Tire diameter
Tire diameter:
Diameter of the tire.
Rolling circumference
Calculation incl. load from the vehicle and at a speed of approx. 60 km/h (40 mph) (tire circumference * 0.97).
Tire circumference
Purely calculated circumference of the tire without mounting on a rim and without load.
Tire height
Height of the sidewall of the tire.
Rim size
Rim size:
Diameter of the rim.
Rim width
Rim width:
Width of the rim.
Poke (Outer Edge)
Distance between the OUTER rim edge and the contact surface of the brake disk or brake drum.
Inset (Inner Edge)
Distance between the INNER rim edge and the contact surface of the brake disk or brake drum.
Change in ground clearance
Value by which the vehicle is higher or lower with the new tires.
Changing the rolling circumference. If the deviation is too high, it may be necessary to adjust the speedometer.
Displayed speedometer value with desired tires, which corresponds to the displayed 100 mph or km/h with existing tires.
Change outer edge per side
Distance between the outer surfaces of the rims. The rims in the wheel housing move inwards or outwards by this value.
Change inside edge per side
Distance between the inner surfaces of the rims. The ET (offset) has an influence on this value.
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