Tire Size Calculator
La barbardhigo laba tirada tiirka: dhererka, wareegga iyo speedometer qalad.
Natiijooyinka cusbooneysiinta sida aad ku qorto.
Ku saabsan Kalkaaliyahan
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.
Su'aalaha badanaa la isweydiiyo
Sidee badan farqiga tirada tiirka waa ammaan?
Isbedelka guud ee dhererka hoos ku saabsan 3% ka dhigaysa speedometer dhexda dulqaad iyo ka hortagga dhibaatooyinka ku shubka ama gearing. Kalkaaliyihii warbixinno boqolkiiba sax ah si aad u go'aansan kartaa isbedelka.
Sidee baa tiir weyn saameyn ku speedometer aan?
Speedometer tirada wareegyada wheel ka dhanka ah cabbirka tiirka asalka ah. A tiir sare safarka ka fog wareeg kasta, sidaas darteed waxaad dhab ahaan u socdaan ka dhaqso badan sida ay muujinayaan dial; tiirka yar ka dibna ka soo horjeeda. Kalkaaliyihii siiyaa xawaaraha dhabta ah ee la muujiyay 60 mph.
Maxay yihiin tirada 205/55R16 micnaheedu yahay?
205 waa dhererka mitir, 55 waa dhererka sidewall sida boqolkiiba dhererka (sidaa darteed 55% ee 205 ≈ 113 mm), R macnaheedu waa dhismaha radial, iyo 16 waa dhererka giraangiraha inji.
Maxaa ah plus-sizing tiir?
Plus-size waa mid ku habboon wheel-dhexroor weyn oo leh tiirka hoose profile sidaas daraaddeed dhererka guud ee ku nool oo ku saabsan sida isku mid ah - a "plus mid" ama "plus laba" isbedelka. Ilaalinta dhererka guud ee ku jira in ka badan 3% ee saamiyada ilaaliya speedometer saxnaanta iyo gearing marka la beddelayo muuqaalka iyo xakamaynta.
Haddii aan ku habboon yahay jilibka weyn, sidee baan u haystaa dhexroorka guud oo isku mid ah?
Ka dhigi qiyaasta tirada tirada (a sidewall dufanka) iyo badanaa u ballaadhiyaan si ay u yar u abaalmarin. Ka tagaan 16-inch in 17-inch jilibka, ka hooseysa profile ka 55 ilaa 45 ka dhigaysa dhexroorka in ka badan isku mid ah, sida tusaale ahaan shaqada muujinaya.
Ma tiir sare ka dhigi doonaa speedometer ii akhriya sare ama hooseeya?
A tiir sare safarka ka fog wareeg kasta, sidaas darteed waxaad dhab ahaan u socdaan ka dhaqso badan sida ay muujinayaan dial - speedometer akhriya hoose. A tiirka yar yahay ka dib, akhrinta sare. Kalkaaliyihii siiyaa xawaaraha dhabta ah ee la muujiyay 60 mph ee isbeddelka.
API — isticmaal xisaabinta ka code
Wici xisaabinta sida free JSON endpoint - key ma loo baahan yahay. Dib u soo dir qiimaha goobta hoos ku qoran sida parameters su'aal ama JSON. Wax kasta oo aad ka maqan tahay isticmaalaa default la mid ah ee boggani waa hore loo buuxiyey la; parameter aan la aqoon waa 400, marnaba ma aha zero maqan. Akhri dhammaan API xuquuqda →
Xarafka
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);Natiijooyinka waa tirakoobka loogu talagalay tilmaamaha guud oo keliya, maaha dhaqaale, caafimaad ama talo bixin canshuur.