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Goodyear - Ultra High Performance Tyres
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"Tyretraders 25% Cheaper"
"On a recent independent price survey TyreTraders came out tops overall. Their closest competitor averaged 6% dearer on eight tyres randomly selected from seven leading manufacturers. The big guns in the tyre industry (Hi-Q, KwikFit, Ats and National Tyres) were a staggering 25% dearer."

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Federal RS-R
Tyretraders are pleased to Announce that Frederal RS-R track day tyres are now available
Changes to our shipping
We can now ship your tyres to an address other than your billing address.
* Shipping to all Major European Countries now available *
New Lower carriage Rates
Carriage for Home Delivered Tyres now from only £2.48 per tyre
Based on the Minimum order 2 tyres
Extra charge may apply to heavier items
Online Tracking
Track your home delivered order from the Account section of the Website

Tyretraders.com Tyre Calculator

Original Tyre Size

New Tyre Size

Sidewall Height mm 
Wheel RPM
Radius mm
Ratio Difference %
Speedo Reading
Sidewall height mm
Wheel RPM
Radius in mm
Wheelarch Difference mm
New Speedo Value

TyreTraders Tyre Calculator is provided to help you work out what differences a tyre upgrade will make to your speedometer.

The values calculated are:-
Sidewall height - this is the height of the tyre from the edge of the rim to the tread.
Wheel revolutions per mile
Ratio - this is the percentage difference between the circumferences of the tyres.
Radius - this is the radius of the wheel and tyre combination i.e. the distance from the centre of the wheel to the edge of the tyre
Wheelarch difference - this is the extra amount of wheelarch space that the new wheels take up; it can be useful to work this out if you are worried about the tyres rubbing the wheelarch. If the value is negative, then there is more wheelarch clearance. Also note that it is only working out height differences, not how much extra the a difference wheel will stick in/out.
Speed differences - " how will it affect my speedo?" Please use the tyre calculator above!
Please remember that these are only theoretical values, and that in usage the values you may see can vary due to tyre wear, tyre pressure, tyre make, etc. Check that the new tyre size is currently in production.

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