I-Calculator yobungakanani beTyre
Uthelekiso lwee-tairi ezimbini: ubukhulu be-diameter, ubukhulu be-circumference kunye ne-speedometer error.
Iinketho ze projekti
Malunga nale Calculator
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.
Imibuzo ebuza rhoqo
Ubungakanani obuphi bethayile obunokusetyenziswa ngokukhuselekileyo?
Utshintsho kumphezulu opheleleyo ongaphantsi kwe-3% lugcina isixa-mali sesantya ngaphakathi kokuzimela kwaye luthintela ukutyhala okanye iingxaki zokuqhuba. I-calculator ixela i-percentage echanekileyo ukuze ukwazi ukucinga ukuba utshintshe.
I-tyre enkulu ibangela ntoni kwi-speedometer yam?
Umlinganiselo wesantya ubala ujikelezo lwevili ngokuchasene nobungakanani bethayipha eliphambili. Ithayipha eliphakamileyo lihamba ngaphezu kwendlela nganye, ngoko ke uhamba ngokukhawuleza kunethayipha ebonisa udidi; itayipha efutshane ihamba ngaphantsi. I-calculator inika ukhawulezo olunyanzelekileyo kwi-60 mph ebonisiweyo.
Ithetha ntoni inani le-205/55R16?
205 ngububanzi bendlela ehamba ngayo ngeemilimitha, 55 ngubude bedonga lwecala njengophesenti bobubanzi (oko kukuthi 55% ye 205 ≈ 113 mm), R kuthetha ukwakha okujikelezayo, 16 ngububanzi bevili lentsimbi ngee-intshi.
Yintoni ubungakanani obungaphezulu betyre?
Ubungakanani obungaphezulu bulungele ivili elibanzi kakhulu elinomthamo ophezulu netyre ephantsi kakhulu ukuze umthamo opheleleyo uhlale ufanayo - "ukongeza omnye" okanye "ukongeza amabini" utshintshe. Ukugcina umthamo opheleleyo ngaphakathi kwe-3% yempahla igcina ukuthembeka kwesityhilelo sesantya kunye nokuqhuba ngelixa utshintsha ukubonakala nokuphatha.
Ukuba ndifaka iringi enkulu, ndingayigcina njani i-diameter efanayo?
Nciphisa uthelekiso lwethayibhu (i-sidewall encinci) kwaye rhoqo uyikhuphe kancinci ukuze ihlawulwe. Ukusuka kwi-16-intshi ukuya kwi-17-intshi ye-rim, ukuwa kweprofayile ukusuka kwi-55 ukuya kwi-45 igcina umngxuma ofanayo, njengoko imizekelo esebenza ibonisa.
Ingaba i-tyre ephakamileyo iya kwenza ukuba i-speedometer yam ifunde phezulu okanye phantsi?
Ithayibhu ephakamileyo ihamba ngaphezu kwendlela nganye, ngoko ke uhamba ngokukhawuleza kunesiqhelo - imitha yokhawuleziso ifunda phantsi. Ithayibhu efutshane ihamba ngaphantsi, ifunda phezulu. I-calculator inika ukhawulezo olunyanzelekileyo kwi-60 mph ebonisayo ukutshintshela.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
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);Results are estimates for general guidance only, not financial, medical or tax advice.