AlloyWheels.COM, Number 1 Alloy Wheels & Tyres Specialist, 01702 545689

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Select Make, Model then size, to show what alloy wheels & tyre packages we have to fit your vehicle.

Tyre Size Calculator, Rim Width Calculator and new Tyre Size Generator all in one (try to keep the radius within + or - 2.5%).

It's important to keep to the cars original tyre circumference, what we do is fit larger alloy wheels and a smaller profile tyre to compensate, otherwise gearing, speedo, engine management could be affected, this tool can be used to ensure this.
Can also be used to find cheaper alternative sized tyres, therefore saving you money.

Tyre Size to Compare	Diameter	Circumference	Fits Wheel Rim
Current	mm	mm
New	mm	mm
Difference %	mm	mm
When speedometer reads mph/kph your actual speed will be mph/kph.

Possible new tyre size, within the current & new tyre size range, within + or - 2.5% adjustable below;

Tyre Size   Diameter  Circumference  Difference  Speedo  Fits Wheel Rim

----------  --------  -------------  ----------  ------  --------------

205/60 R15  628 mm    1973
    mm        -0.95 %     69.33   5.5x15
    to 7x15

215/60 R15  640 mm    2011
    mm         0.95 %     70.67   6x15
    to 7.5x15

195/65 R15  634 mm    1992
    mm         0.00 %     70.00   5.5x15
    to 7x15

205/65 R15  648 mm    2036
    mm         2.21 %     71.55   5.5x15
    to 7x15

225/50 R16  632 mm    1985
    mm        -0.35 %     69.75   6x16
    to 7.5x16

195/55 R16  620 mm    1948
    mm        -2.21 %     68.45   5.5x16
    to 7x16

205/55 R16  632 mm    1985
    mm        -0.35 %     69.75   5.5x16
    to 7x16

215/55 R16  642 mm    2017
    mm         1.26 %     70.88   6x16
    to 7.5x16

195/60 R16  640 mm    2011
    mm         0.95 %     70.67   5.5x16
    to 7x16

215/45 R17  626 mm    1967
    mm        -1.26 %     69.12   7x17
    to 8.5x17

225/45 R17  634 mm    1992
    mm         0.00 %     70.00   7.5x17
    to 9x17

205/50 R17  636 mm    1998
    mm         0.30 %     70.21   5.5x17
    to 7x17

215/50 R17  646 mm    2029
    mm         1.86 %     71.30   6x17
    to 7.5x17

205/40 R18  622 mm    1954
    mm        -1.91 %     68.66   7x18
    to 8.5x18

215/40 R18  630 mm    1979
    mm        -0.65 %     69.54   7x18
    to 8.5x18

225/40 R18  638 mm    2004
    mm         0.60 %     70.42   7.5x18
    to 9x18

Width ( to ) Profile ( to ) to