Greentrac 315/40R21 tyres
Compare 1 Greentrac tyre in 315/40R21 (also written 315/40 R21 or 315 40 21), priced from $355 to $355 each including GST. Choose delivery to your address, or have them sent to a Tyroola fitting partner near you to be fitted and balanced.
What 315/40R21 means
A 315/40R21 tyre is 315 mm wide across the tread. The sidewall is 40% of that width, about 126 mm tall, and it fits a 21-inch rim. That puts the overall diameter at roughly 785 mm, or about 405 wheel revolutions per kilometre. The R stands for radial construction.
Load index and speed rating
Tyres listed in 315/40R21 carry load indexes from 115 (1,215 kg per tyre) to 115 (1,215 kg per tyre) and speed ratings Y (300 km/h). Your vehicle's tyre placard, usually inside the driver's door frame, sets the minimum load index and speed rating. Replacements must match or exceed both.
Frequently asked questions
What does 315/40R21 mean?
It means a tyre 315 mm wide with a sidewall 40% of that width (about 126 mm), radial construction, for a 21-inch rim. The load index and speed rating follow the size on the sidewall, for example 315/40R21 91V.
How much are 315/40R21 tyres?
Right now 315/40R21 tyres range from $355 to $355 each including GST, depending on brand, tread type and load rating. A set of four starts from $1,420.
Which load index and speed rating do I need for 315/40R21?
Use the load index and speed rating on your vehicle's tyre placard as the minimum. A higher load index or speed rating is fine; a lower one is not. If your placard lists more than one size, use the ratings shown for the size you are buying.
Can I get 315/40R21 tyres fitted near me?
Yes. At checkout, choose a Tyroola fitting partner near you and the tyres are delivered there for fitting and balancing. You can also have them delivered to your own address.