Aprilia Tuono Power Commander setup – chunky tyres cost horsepower!
The owner of this Tuono had customised it himself in a ‘street scrambler’ style – big knobbly tyres, high bars, nice one-off numberplate bracket etc – and it looked great. But when it came time to set up his Power Commander on the Dyno he was disappointed… with only 118bhp at the back wheel.
Now these generally make 125-ish horses but all the drag generated by the fat back tyre was killing the engine on the Dyno roller. On the road, the effect would be less pronounced but sometimes (it seems) you have to pay for style!