What 255/40R21 means
255/40R21 identifies the tire dimensions used for fitment. Match this size exactly unless a qualified installer confirms an alternative.
Exact-size tire comparison
255/40R21 Tires: Compare Prices, Brands & Options
Only exact 255/40R21 tire matches appear in the main results. Confirm tire size, load rating, speed rating, and fitment on the retailer site before buying.
Size guide
Buying considerations
Compare category, load rating, speed rating, installation, shipping, current price, and whether the retailer fitment tool matches your vehicle.
Vehicles using this size
Brands available in this size
Tire categories available
Common alternatives
1Exact Size MatchVerified ProductPrice Available
Performance tires
Toyo Proxes Sport SUV Street/Sport Truck Summer
255/40R21performance
- Category
- Performance tires
- Use case
- performance
255/40R21 shoppers comparing Toyo Proxes Sport SUV Street/Sport Truck Summer through The Tire Rack product feed availability.
$255.10 at Tire RackConfirm size, load rating, speed rating, and fitment before purchase.255/35R21 tires265/35R21 tires295/35R21 tires255/40R20 tires245/40R20 tires255/45R20 tires245/45R20 tires255/50R20 tires
FAQ
What vehicles commonly use 255/40R21 tires?
255/40R21 can appear on multiple trims and vehicle types. Confirm the driver-side door placard or retailer fitment tool before buying.
What brands make 255/40R21 tires?
Common 255/40R21 brand paths include Toyo, Michelin, Goodyear, Bridgestone. Availability changes by retailer, model, load rating, and speed rating.
What tire categories are available in 255/40R21?
255/40R21 tire searches commonly include Best, Price, All-Season, All-Weather categories. Match the category to climate, vehicle use, mileage needs, and ride preference.
Can I replace 255/40R21 with 255/35R21?
Only use a different size if a qualified installer or retailer fitment tool confirms it. Diameter, load rating, speed rating, clearance, and vehicle systems can all be affected.
Are 255/40R21 tires expensive?
255/40R21 tire pricing depends on brand, category, warranty, speed rating, load rating, installation, shipping, and current retailer availability. Compare retailer checkout pages before deciding.
What should I check before buying 255/40R21 tires?
Confirm exact size, load rating, speed rating, tire category, installation availability, shipping, return policy, and whether the retailer fitment tool matches your vehicle.
Related tire research
Price and buying pages
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Brand and hub pages
Reviewed by the Tire Search Engine editorial team. Updated June 3, 2026. Sources: retailer fitment tools, tire sidewall specifications, manufacturer information, and the Tire Search Engine methodology.