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IXIL exhausts
G&G exhausts
Arrow exhausts
KR Tuned exhausts
LeoVince exhausts
MiVV exhausts
Termignoni exhausts
Decat pipes
Arrow steering damper
Rearsets
Puig
Double bubble screens
Keihin FCR carburettors
Power commander
Dynojet kits
Sprint Filters
DNA Filters
Shift light & Gear display
Yamaha 5 valve
EBC bike brakes
Bike tyres
Tyre warmers
Action camera
Car tyres
EBC car brakes
Oram dampers
Protech dampers
Speedline wheels
Diesel tuning modules
Flatshifter
Propark
Pit & Paddock eqt
Racing consumables
A1 parts - new & used

Select the tyre size you currently have, and then the size you're interested in. Calculate each tyre size and then click on the click to calculate the difference button. It will show you all the rolling radii, circumferences, percentage differences and even speedometer error. We hope that this is  of some use to you and look forward to supplying your chosen tyre size.

Current wheel/tyre New wheel/tyre
/ R / R
   
Current RR: mm New RR: mm
Current circumference: mm New circumference: mm
 
 
Difference in circumference: mm or   %
When your speedo reads 70mph, you're actually travelling at mph
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