Gear Ratio Calculator un chaar numbers ko jodta hai jo tay karte hain ki kisi engine speed par gaadi kitni tez chalegi: transmission gear ratio, final drive ratio, tyre diameter aur RPM. Formula hai speed = RPM × tyre diameter ÷ (gear × axle × 336), jahan constant tyre circumference aur unit conversions ko ek number mein samet leta hai. 265/70R17 jaisi tyre size daaliye aur overall diameter khud nikal aata hai. Tyre-swap section batata hai ki oonche tyres lagane par effective gearing kitne percent badalti hai, aur wo axle ratio suggest karta hai jo original numbers wapas la de — lift kit ke baad hone wale zyadaatar re-gear faislon ke peechhe yahi hisaab hai.
Features
Kisi RPM par road speed, mph aur km/h dono mein
Chuni gayi speed banaye rakhne ke liye zaroori engine RPM
Drive aur driven teeth ke count se gear ratio
Transmission gear × final drive se overall ratio
265/70R17 jaisi size se tyre diameter khud nikalta hai
Tyre-swap comparison, gearing change percent ke saath
Gear Ratio Calculator kaise use karein
Chuniye: speed nikaalni hai, RPM, ya tooth count se ratio
Transmission gear ratio aur final drive (axle) ratio daaliye
Tyre size daaliye — width, aspect ratio aur rim diameter
Result padhiye, phir tyre-swap box mein doosra diameter aazmaiye
Example
Input
2000 rpm, 1.00 gear, 3.73 axle, 28 in tyre
Output
44.7 mph (71.9 km/h), overall ratio 3.73:1
Direct-drive top gear 3.73 axle ke saath — highway cruise ka classic hisaab.
Common errors aur troubleshooting
Calculate ki gayi speed speedometer se kaafi zyada hai. — Tyre diameter check kariye. Speedometer factory tyre size ke liye calibrate hota hai, isliye oonche tyres par asli speed dikhaayi gayi se zyada ho jaati hai — tyre-swap section yahi naapta hai.
Samajh nahin aa raha kaunsa number gear ratio hai aur kaunsa final drive. — Gear ratio us gear ka hai jisme aap chal rahe hain (direct drive mein aksar 1.00). Final drive differential ka ratio hai, aam taur par 3 se 4.5 ke beech.
Tooth-count ratio ulta lag raha hai. — Gear ratio driven teeth ko drive teeth se bhaag dene par milta hai. 11-tooth pinion 41-tooth ring gear ko ghumaye to 3.73:1 hota hai, 0.27:1 nahin.
Aksar pooche jaane wale sawaal
Gear ratio formula mein 336 constant kya hai?
Ye revolutions aur inches ko miles per hour mein badalta hai. Ye (5280 feet × 12 inch) ko (60 minute × π) se bhaag dena hai — tyre circumference aur unit conversions ek number mein.
Bade tyres meri gearing kaise badalte hain?
Mechanical ratio nahin badalta, par effective gearing badal jaati hai:ooncha tyre har chakkar mein zyada doori tay karta hai, isliye kisi speed par RPM gir jaata hai aur acceleration kamzor ho jaati hai. 28 se 33 inch ka badlav lagbhag 18% ooncha hai.
Bade tyres ke baad kaunsa axle ratio chahiye?
Original axle ratio ko naye diameter ÷ purane diameter se multiply kariye. 3.73 axle par 28 se 33 inch jaane par lagbhag 4.40 aata hai, to 4.56 sabse kareebi bikne wala gear set hoga.
Kya calculator drivetrain slip ginta hai?
Nahin. Ye tyre slip aur torque-converter slip zero maanta hai, isliye manual gearbox kareeb baithti hai jabki bina lock-up wala automatic thoda optimistic padhega.