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Accelera

Iota ST68

1200043167

Accelera Iota ST68 255/40R21XL

SKU: 1200043167

Front Tire: 255/40R21XL
Rear Tire: --x-- --

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$178.99 each

$715.96 set of 4

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$178.99 each

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About ThisProduct

The Accelera Iota ST68 All Season in 255/40R21 is an everyday road tire made for drivers who want a straightforward, dependable option on larger 21-inch wheels. Its a sensible fit for many modern SUVs and crossovers that came with big factory wheels, especially if your driving looks like commuting, errands, school runs, and weekend highway trips.

In day-to-day use, this tire is built to help you feel steady and predictable. On dry roads it should track calmly on the highway and feel secure in normal turns and lane changes. In the rain, the all-season design is meant to help keep grip when roads get shiny from a sudden downpour, so youre not white-knuckling it when you hit standing water on an on-ramp or brake for a yellow light in traffic.

Comfort and noise matter on a tire like this, and the ST68 is aimed at regular driving rather than harsh, sporty feel. That said, because this size is a lower-profile tire (common with 21-inch wheels), you may still notice a firmer ride over potholes and rough pavement compared with smaller-wheel setups. If your daily route is full of broken city streets, youll want to keep that in mind.

A 35,000-mile warranty gives you a reasonable expectation for longevity with normal maintenance and sensible driving. One honest limitation: like most all-season tires, its not a true winter tire, so if you deal with frequent deep snow or icy mornings, youll want something specifically made for winter conditions.

Tire Specs

Inventory Number: 1200043167
Brand: Accelera
Model: Iota ST68
Size: 255/40R21
Tire Type: All Season
Tire Weight: 30.13
Tread Depth: 10
Tire Rim Diameter: 21
Section Width: 255
Aspect Ratio: 40
Sidewall: Black Side Wall
Speed Index: V
Load Index: 102
Service Description: 102V

Additional Tire Sizes

16

265/70R16XL 116H

17

265/65R17XL 116H

18

19

20

21

22

305/40R22XL 114W

24

Order Details & Policies

About Us

We didn't build Only Tires for us — we built it for you. Drivers who want straight answers, guaranteed fitment, and a tire that actually suits their vehicle and their life. No pressure. No guesswork. Just the right tire, delivered.

Shipping & Processing

We ship to the Lower 48 states for the advertised price. Tires typically take 1-2 business days to arrive (US48). Shipping timelines are provided on each product page. We can ship outside of the continental US for an additional charge. Contact Us for additional shipping rates. The buyer is responsible for all fees and paperwork beyond standard freight charges.

Delivery Inspection (Damage) - Ship to Home Only

UPS/FedEx ground shipments do not require a signature. Inspect the products as quickly as possible and follow up with us if necessary.
Notify us within 48 hours of receiving the order if any damage is found after delivery.
Very large tires may ship via freight. Inspect every piece BEFORE signing any documents. If damaged, please make full notes on the delivery paperwork before signing.

Returns & Cancellations

Returns

When vehicle information is provided, we review every order before it ships to help ensure proper tire fitment. If your tires are installed and do not properly fit your vehicle, they may still be returned as long as they meet our return condition guidelines.

Return requests must be submitted within 30 days of delivery to qualify for a return. Once approved, we will provide instructions for safely returning your tires. Refunds are issued to your original payment method after inspection. If the return is related to a fitment issue or an error on our part, return shipping fees generally do not apply.

All tires include the manufacturer’s warranty, and our team is available to help with sizing, fitment, returns, or warranty questions. If you need assistance before or after ordering, please contact us.

For full details, please review our complete Returns & Fitment Policy on our FAQ Page.

Cancellations

Cancellation requests or order changes should be submitted as soon as possible, as orders are processed quickly and may already be in progress. Return shipping fees may apply depending on the order status, but they may be waived if requested within 24 hours or if the error is on our end.

Manufacturer Warranty

All tires carry a full manufacturer's warranty. The buyer is responsible for shipping costs related to the warranty. All warranty returns must be approved by the manufacturer before shipping. If you'd like to start a warranty claim, visit our Warranty Center.

California Proposition 65 Warning

WARNING: This product can expose you to Black Carbon Extracts, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to p65warnings.ca.gov.

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Tire Specs

Additional Tire Sizes

16

17

18

19

20

21

22

24

Order Details & Policies

About Us

Shipping & Processing

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Manufacturer Warranty

California Proposition 65 Warning

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Know Your Tire Size?

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Accelera Iota ST68 255/40R21XL

Browse Gallery

Questions about fitment?

About ThisProduct

Tire Specs

Additional Tire Sizes

16

17

18

19

20

21

22

24

Order Details & Policies

About Us

Shipping & Processing

Returns & Cancellations

Manufacturer Warranty

California Proposition 65 Warning

&

Know Your Tire Size?

&

— Tire Options

Other Factory Sizes For Your

Optional Tire Sizes

Know Your Tire Size?

Not Sure What Tire Size To Choose?