Calculator
Tụkwasị nha taya abụọ: diamita, circumference na mmehie speedometer.
Nhọrọ ndị ahụ ga-akpụzi mgbe ị na-etipụta.
N'ihe banyere calculator a
A tire size calculator compares two tires written in the standard P-metric format (for example 205/55R16) — the section width in millimetres, the aspect ratio as a percentage of that width, and the rim diameter in inches. It computes each tire’s overall diameter as the rim plus twice the sidewall height, the rolling circumference, and the percentage difference between the two.
Worked example: a 205/55R16 has a sidewall of 205 × 0.55 = 112.75 mm, so its diameter is 16 × 25.4 + 2 × 112.75 = 406.4 + 225.5 = 631.9 mm. A 225/45R17 has a 101.25 mm sidewall and a diameter of 431.8 + 202.5 = 634.3 mm — about 0.4% taller.
Because a speedometer is geared to the original tire, fitting a taller or shorter tire makes the reading wrong in proportion to the diameter change; at an indicated 60 mph the taller tire above means a true speed near 60.2 mph. Keep the difference under about 3% to stay within speedometer tolerance and avoid rubbing or gearing problems — which is exactly what drivers use this for when plus-sizing wheels or fitting winter tires.
Ajụjụ ndị a na-ajụkarị
Olee otú nha tire dị iche iche bụ n'ụzọ dị mma?
A change in overall diameter under about 3% keeps the speedometer within tolerance and avoids rubbing or gearing problems. The calculator reports the exact percentage so you can judge a swap.
Olee otú taya buru ibu ga-emetụta m'omume ọsọ?
Speedometer na-enyocha wheel revolves n'ebe ọha nha tire. Tire dị elu na-aga n'ebe dị anya n'otu n'otu, yabụ ị na-aga n'ụzọ
Gịnị bụ na nọmba na 205/55R16 pụtara?
205 bụ obosara nke n'ime millimita, 55 bụ elu nke ọdụm dị ka pasent nke obosara ahụ (ya mere 55% nke 205 ≈ 113 mm), R pụtara radial nrụpụta, na 16 bụ wheel rim diameter n'ime inch.
Gịnị bụ n'ụdị n'ụdị tiiri?
Plus-sizing na-adọta wheel nke nwere nnukwu diameter na tire nke nwere profaịlụ ala, yabụ na ọkara diameter na-adịgide adịgide - a "plus one" ma ọ bụ "plus two" swap. Na-echekwa ọkara diameter n'ime ihe dịka 3% nke stock na-echekwa speedometer na-egosipụta na-agbanwe agbanwe na-egosipụta na-egosipụta.
Ọ bụrụ na m etinyelarị rim dị ukwuu, olee otú m ga-esi na-echekwa nha nke zuru ezu?
Lower tire’s aspect ratio (a thinner sidewall) na mgbe ụfọdụ na-enwe ike na-enwe ike na-enwe ike ịkwụ ụgwọ. Na-aga site na 16-inch ka 17-inch rim, na-ahapụ profaịlụ site na 55 ka 45 na-echekwa diameters na-adịchaghị adịchaghị, dị ka ihe atụ na-arụ ọrụ na-egosi.
Ọ ga-eme ka taya dị elu mee ka m gụọ n'ime ọsọmmeter elu mọọbụ ala?
A taller tire travels farther per revolution, so you are actually going faster than the dial shows — the speedometer reads low. A shorter tire is the reverse, reading high. The calculator gives the true speed at an indicated 60 mph for the swap.
API — jiri kaadị a site na kóòdù
Kpọọ kalkulata a dịka ebe ngwụcha JSON n'efu - enweghị kii achọrọ. Ziga valiu ebe ahụ n'okpuru dịka paramita ajụjụ mọọbụ JSON. Ihe ọbụla ị na-ewepụ na-eji dìfọ́ọ̀ltụ̀ nke a na-edebe ihuakwụkwọ a na ya; parameter a na-amaghị bụ 400, ọ dịghị sẽọ̀rọ̀. Gụọ ngwe ndị ahụ niile →
Ebemkpofuozi
GET https://calculator.free/api/v1/tire-size/curl
curl "https://calculator.free/api/v1/tire-size/?w1=205&a1=55&r1=16&w2=225&a2=45&r2=17"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/tire-size/?" + new URLSearchParams({
"w1": "205",
"a1": "55",
"r1": "16",
"w2": "225",
"a2": "45",
"r2": "17"
}));
const data = await r.json();
console.log(data.results);Ihe a na-ahụta bụ n'ihi nlekọta n'ozuzu ya, ọ bụghị nlekọta ego, ọgwụ ma ọ bụ nlekọta ego.