Free shipping to the lower 48

As low as 0% APR financing through Affirm

As low as $1 down with Katapult

5-Star Rated Support

shopping cart

(0 items)

|Save Cart

Deals & Rebates

Installer or Delivery?

Tire installer will only be applicable to your most recent vehicle search. If you would like tire installation on another vehicle, please make separate orders.
Missing vehicle or zipcode information.
Enter your missing vehicle or zipcode here to view installer options.
  • Ship to Local Installer

  • Ship to Home

Road Hazard Protection with Extend.

Order Total
excl. tax
$0.00
OR EXPRESS CHECKOUT

Warning!

Are you sure you want to remove Anthem Off Road LT275/70R18 Tire from your cart?

billing information

Address Type:

    Shipping Information

    Address Type:

    Shipping address required for mobile installation.

      State and Zip locked for installer accuracy. Click to change.

      Radar Dimax R8 Plus 285/40ZR21XL

      Tire:285/40ZR21XL

      SKU: DSC0161

      Backorder

      (2 Reviews)

      $175.43 each
      $701.72 set of 4
      90 days 0% via
      $1 down via

      Front Tires

      $175.43 each

      Rear Tires

      1-3 MONTH NATIONAL BACKORDER

      Shop Available Tires

      Estimate Your Delivery Time
      Arrives as soon as Enter ZIP to see availability
      Free Delivery to the Lower 48
      Shipping to

      Other Tire Sizes

      Customer Support Helper

      Questions about fitment?

      Talk to a Only Tires Tech before you buy

      About This Radar Dimax R8 Plus 285/40ZR21XL

      The Radar Dimax R8 Plus is a summer tire made for drivers who want a sure-footed feel in warm weather, especially on vehicles that run a wider 21-inch tire size like 285/40R21. Its a practical choice for daily lifecommuting, errands, school runs, and highway tripswhen you want your SUV or large crossover to feel stable and predictable.

      In everyday driving, this tire is set up to give you confident steering and solid grip on dry pavement, like when youre merging onto the freeway or making a quick lane change in traffic. Summer tires are also designed to handle wet roads better than many people expect, so you should feel more planted during a heavy rain commute, especially when slowing down for a ramp or rolling through standing water at city speeds.

      Comfort and noise are usually what you notice most after a few days. With a tire in this size, you can expect a firmer, more connected ride than a softer all-season option, but it should still feel controlled and steady on long highway stretches. For longevity, summer tires can wear faster than all-season tires if you drive hard or rack up lots of miles, but normal driving habits and keeping up with maintenance go a long way. It also comes with a manufacturer warranty for added peace of mind.

      One honest limitation: because its a summer tire, its not a good match for cold weather or any chance of snow and ice. If your mornings regularly dip toward freezing, youll want something more cold-friendly for year-round safety.

      Tire Specs

      • Inventory Number: DSC0161
      • Brand: Radar
      • Model: Dimax R8 Plus
      • Size: 285/40ZR21
      • Tire Type: Summer
      • Tire Type 2: Performance
      • Tire Weight: 35.51
      • Warranty: Manufacturer mileage warranty
      • Tire Calc Height: 29.98
      • Tire Calc Width: 11.22
      • Tread Depth: 10.5
      • Tire Rim Diameter: 21
      • Section Width: 285
      • Inflated Diameter: 30
      • Inflated Width: 11.22
      • Aspect Ratio: 40
      • Sidewall: Black Side Wall
      • Speed Index: Y
      • Load Index: 109
      • Load Range: XL
      • Service Description: 109Y

      Order Details & Policies

      Shop By Vehicle Shop Custom Size

      &

      Zip or postal code is needed to see installer and shipping options

      Know Your Tire Size?

      We can tell you exactly what fits

      Tire Measurements

      Front Tires

      Tire Measurements

      Rear Tires

      Front Tire Size

      Rear Tire Size

      &

      Zip or postal code is needed to see installer and shipping options

      Change Vehicle
      Factory Original More Sizes Custom Sizes

      — Tire Options

      SAME SIZE ALL AROUND

      STAGGERED — DIFFERENT FRONT & REAR

      Other Factory Sizes For Your 

      Tire Measurements

      Front Tires

      Tire Measurements

      Rear Tires

      Optional Tire Sizes

      Tire Measurements

      Front Tires

      Tire Measurements

      Rear Tires

      Know Your Tire Size?

      We can tell you exactly what fits

      Tire Measurements

      Front Tires

      Tire Measurements

      Rear Tires

      Front Tire Size

      Rear Tire Size

      Heads up — fitment isn't guaranteed

      Custom sizes skip our fitment database. If you order a size that doesn't fit your vehicle, our Guaranteed Fit or replacement warranty won't apply.

      Shopping by Year / Make / Model is the fastest way to get a size we know fits.

      Sign up to be notified when item is back in stock

      Enter your email here and we'll let you know when this is in stock again



      Update Your Vehicle