284/40R21 4x4 & SUV tyres
Compare 1 4x4 & SUV tyre in 284/40R21 (also written 284/40 R21 or 284 40 21), priced from $406 to $406 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 284/40R21 means
A 284/40R21 tyre is 284 mm wide across the tread. The sidewall is 40% of that width, about 114 mm tall, and it fits a 21-inch rim. That puts the overall diameter at roughly 761 mm, or about 418 wheel revolutions per kilometre. The R stands for radial construction.
Load index and speed rating
Tyres listed in 284/40R21 carry load indexes from 109 (1,030 kg per tyre) to 109 (1,030 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 284/40R21 mean?
It means a tyre 284 mm wide with a sidewall 40% of that width (about 114 mm), radial construction, for a 21-inch rim. The load index and speed rating follow the size on the sidewall, for example 284/40R21 91V.
How much are 284/40R21 tyres?
Right now 284/40R21 tyres range from $406 to $406 each including GST, depending on brand, tread type and load rating. A set of four starts from $1,624.
Which load index and speed rating do I need for 284/40R21?
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 284/40R21 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.