UK tyre comparison • Source feeds: 29 Sept 2026
☀ SummerDunlop SP Sport Maxx GT600 RunFlat tyre model

Retailer-supplied model image; sidewall and markings may vary by size.

Dunlop · Car

SP Sport Maxx GT600 RunFlat

255/40 R20 101(Y) · XL

255/40 ZR20 (101Y) XL NR3, with rim protection (MFS), runflat BLK

Wet gripAEfficiencyDExternal noise70 dB
From £260.18 / tyre

2 retailers · Source: 29 Sept 2026

Affiliate links. We may earn commission. Item prices per tyre; fitting extra. Both retailers are in the Delticom group.

Tirendo UK Affiliate link ↗£260.18mytyres.co.uk Affiliate link ↗£260.18Delivery, dates & full offer details ↓

Size alone does not confirm fitment. Check your vehicle’s approved size, load, speed and any original-equipment markings.

Compare retailer prices

Per tyre. Fitting is not included in this comparison. Confirm the final total and availability with the retailer.

Affiliate disclosure We may earn a commission when you buy through these links. Prices are ordered from low to high, regardless of commission.

Tirendo UK

Listed available in feed · 2-4 working days

Source updated 29 Sept 2026 · Imported 30 Sept 2026
£260.18Feed delivery charge: £0Confirm postcode and order conditions
Visit retailer ↗Affiliate link

mytyres.co.uk

Listed available in feed · 2-5 weekdays

Source updated 29 Sept 2026 · Imported 30 Sept 2026
£260.18Feed delivery charge: £0Confirm postcode and order conditions
Visit retailer ↗Affiliate link

EXPLORE THE CAR REFERENCES

Cars with 255/40 R20 in their manufacturer references

2 model guides mention this size. Open a guide to check the documented edition, wheel option and axle.

Size match only — compatibility is not confirmed. The tyre shown may have different load or speed ratings, XL/HL, run-flat construction or manufacturer markings. Check your exact generation, trim, wheel and axle requirements before buying.

Volvo EC40 →

2026 UK manual

United Kingdom

  • 255/40 R20 · Rear
    Different front and rear wheels; never interchange axles
Browse all 200 car guides →

THE PRICE, OVER TIME

Recorded price changes.

25 Sept 2026 – 29 Sept 2026 · UK GBP item price per tyre

£260.18 – £261.17Observed range
Recorded GBP item prices for Dunlop SP Sport Maxx GT600 RunFlat 255/40 ZR20 (101Y) XL NR3, with rim protection (MFS), runflat BLKmytyres.co.uk: 2 recorded price levels; Tirendo UK: 2 recorded price levels. Exact dates and prices are in the table below. Steps show when a changed price was recorded, not every movement between feeds.£260.18£261.17mytyres.co.uk: £261.17, 25 Sept 2026mytyres.co.uk: £260.18, 29 Sept 2026Tirendo UK: £261.17, 25 Sept 2026Tirendo UK: £260.18, 29 Sept 202625 Sept 202629 Sept 2026
━ mytyres.co.uk┄ Tirendo UK

Each point is a dated retailer-feed observation. Repeated unchanged prices are not added as new changes. Lines connect recorded levels; changes between checks may be missing. Delivery and fitting are excluded. This is a short history from two retailers in one group, not a market price index.

View dates and prices as a table
RetailerChange observedItem price
mytyres.co.uk25 Sept 2026£261.17
mytyres.co.uk29 Sept 2026£260.18
Tirendo UK25 Sept 2026£261.17
Tirendo UK29 Sept 2026£260.18

mytyres.co.uk last source check: 29 Sept 2026 · Tirendo UK last source check: 29 Sept 2026

YOUR SIZE IN CONTEXT

How does this variant compare?

Among 144 current summer variants in 255/40 R20, from 23 brands in our feeds. Each variant contributes its lowest available item price once.

This variant£260.18
Same-size median£212.34
Same-size range£137.93–£313.34
Wet-grip A104 / 144Variants with a supplied grade

Ratings, load, speed, construction and manufacturer approvals may differ within this size. Price position is not a performance score or a fitment recommendation.

EXPLORE THE ALTERNATIVES

Similar tyres in 255/40 R20

Same recorded size, season, vehicle category, XL marking and run-flat status. Exact-rated choices are limited, so some cards have different load or speed ratings, clearly marked below.

Check the full specification and manufacturer markings. A missing run-flat marking is not proof of conventional construction. These suggestions do not confirm vehicle fitment. Check your car’s requirements.

Different load or speed — check requirements

Speed Y vs (Y) · £14.63 less per tyre · Efficiency C vs D · External noise 72 vs 70 dB · EV marking differs; check specification

Different load or speed — check requirements

Speed Y vs (Y) · £19.00 less per tyre · Efficiency B vs D

Different load or speed — check requirements

Speed Y vs (Y) · £23.99 more per tyre · Efficiency A vs D

Different load or speed — check requirements

Speed Y vs (Y) · £25.47 less per tyre · Wet grip B vs A · Efficiency B vs D · External noise 69 vs 70 dB

Different load or speed — check requirements

Speed Y vs (Y) · £55.49 less per tyre · Efficiency C vs D · External noise 73 vs 70 dB

Browse all 255/40 R20 tyres →

The finer details

Know what you’re comparing.

Specifications are supplied by the retailer for this variant. A missing field means it is not confirmed. Label values can differ between sizes of the same model.

How to read tyre labels ↗
Tyre size
255/40 R20
Load index
101
Speed rating
(Y)
Season
Summer
Vehicle category
Car
Extra load (XL)
Marked XL / reinforced
Run-flat
Marked in retailer specification
EV suitability
Not confirmed
Wet grip
A
Fuel efficiency
D
External rolling noise
70 dB
Manufacturer part number
350866
EAN / GTIN
4250427447162
Read the retailer’s description

Supplied by mytyres.co.uk. These are the retailer’s product claims, not independent test findings from Tyres Compared.

Dunlop SP Sport Maxx GT600 ROF Exceptional levels of grip and handling, for high performance sports cars Enhanced grip on wet and dry Precision handling at speed High aquaplaning resistance Enhanced driving comfort Benefits: Enhanced grip on wet and dry The SP SportMaxx GT 600 delivers high levels of wet and dry grip to answer the demands of sport driving. It uses silica to maintain flexiblity on rain covered surfaces. Carbon particles in the compound help to ensure good dry grip, for improved braking and acceleration. Precision handling at speed Get maximum driving enjoyment when traveling at speed. The tread features large shoulder blocks and continuous center ribs for precise cornering and steering. High aquaplaning resistance Straight central grooves maximise water dispersal to ensure safer driving in heavy rain conditions. Driving comfort Dunlop’s Jointless Band Technology maintains tyre shape at high speeds, giving you a smoother ride while also maximising steering control. ROF Technology: Dunlop RunOnFlat Technology allows for continued driving after a puncture or blowout for up to 80km. RunOnFlat tyres use reinforced sidewalls, which enable the tyre to maintain mobility after a complete loss of air pressure..

Source & product identity

Offers are matched by validated EAN/GTIN with matching brand, size, load, speed and manufacturer part number. Tyres without a valid GTIN remain retailer-specific. Merchant specification: 255/40 ZR20 (101Y) XL NR3, with rim protection (MFS), runflat BLK.

These are dated retailer feed observations, not independent tyre tests or guaranteed stock. Tirendo UK feed updated 29 Sept 2026; mytyres.co.uk feed updated 29 Sept 2026.