Te tātaitai o te rahi o te tīwae
E whakataurite ana ki ngā rahi rererangi e rua: te whakawhitinga, te hurihanga me te hapa o te whakatere.
Ka whakahōutia ngā hua i te wā e tātuhi ana.
Mo tēnei tātaitai
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.
Ko nga pātai e pā ana
He nui te rerekētanga o te rahi o te tīwae e haumaru ai?
Ko te huringa i te whakawhitinga katoa i raro i te 3% e pupuri ana i te tere i roto i te whakaaetanga, ā, ka ārai i ngā raruraru o te whakaroa, o te whakaroa rānei. Ka pūrongo te tātaitai i te ōrautanga tika kia taea ai e koe te whakatau i tētahi whakawhitinga.
He pēhea te pānga o te tīwae nui ake ki tōku whakatere?
E tatau ana te whakateretanga i ngā hurihanga porowhita ki te rahi taketake o te tīwae. He nui ake te haere o te tīwae tiketike i ia huri, kia tere ake ai koe i te whakaaturanga o te tātaitanga; he iti iho te tīwae e whakarerekē ana. Ka hoatu e te tātaitanga te tere pono i te 60 mph.
He aha te tikanga o ngā tau i roto i te 205/55R16?
Ko te 205 te whānuitanga o te rererangi i roto i ngā ine, ko te 55 te teiteitanga o te pakitara taha hei ōrautanga o taua whānuitanga (nā reira ko te 55% o te 205 ≈ 113 mm), ko te tikanga o te R he hanga pūwhitiwhiti, ā, ko te 16 te whakawhitinga o te rim o te porowhita i roto i ngā inihi.
He aha te nui o te tīpako?
Ka āhei te tāpiri-ki te whakawātea i tētahi porowhita whānui ake me tētahi tīwae iti iho kia noho ai te tawhiti katoa i te ōrite - he "tahi nui", "rua nui" rānei. Ko te pupuri i te tawhiti katoa i roto i te 3% o te pūtea e tiaki ana i te tika o te whakatere me te whakarerekētanga i te wā e huri ana i te āhua me te whakahaere.
Mēnā ka whakaritea e au he pereti nui ake, he pēhea te pupuri i te ōritetanga o te whakawhitinga katoa?
Ka whakaiti te ōwehenga āhua o te tīwae (he pakitara taha iti iho) ā, i te nuinga o te wā ka whakawhānui kia whakamutua ai, ka neke mai i tētahi 16-inihi ki tētahi 17-inihi, ka whakaiti te tātai mai i te 55 ki te 45 e pupuri ana i te whakawhitinga tata tonu, pērā ki te whakaaturia e te tauira mahi.
Ka whakahaua te tīwae tiketike ki te ako i tōku tātari tere, ki te tiketike rānei?
Ka haere haere te tīwae tiketike ake i ia hurihanga, nā reira ka tere ake koe i te whakaaturanga o te tātaitanga — ka whakaako te tātaitanga i te iti. Ko te tīwae poto ake te ātete, e whakaako ana i te tiketike. Ka hoatu e te tātaitanga te tere pono i te 60 mph e whakaaturia ana mō te whakawhitinga.
API — whakamahi tēnei tātaitai mai i te waehere
E kī ana tēnei tātaitai hei wāhi mutunga kore JSON - kāore he kī e hiahiatia ana. Ka tukuna ngā uara āpure i raro nei hei tohutoro pātai, JSON rānei. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka pānui te papatono API katoa →
Whakamutunga
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);Ko ngā hua he whakataunga mō te tohutohu ahuwhānui anake, ehara i te tohutohu moni, rongoā, tāke rānei.