I have a 300mm fat tire kit, do you believe this will be a factor in my test???

Belive it or not, the contact patch will be the same if the rear tire pressure is the same. The weight of the bike is divided over the same number of square inches regardless of the tire size. The patch may change shape, but area x pressure = force.The diameter of the 300 is larger than a 240 so the torque arm will be a little longer and that means a little less force will be seen by the Dino drum. that will drop your numbers a little bit, but the shape is what you need to focus on and not the actual numbers.

Quote from: TRaider_John on Dec 03, 2010, 10:02:13 PMBelive it or not, the contact patch will be the same if the rear tire pressure is the same. The weight of the bike is divided over the same number of square inches regardless of the tire size. The patch may change shape, but area x pressure = force.The diameter of the 300 is larger than a 240 so the torque arm will be a little longer and that means a little less force will be seen by the Dino drum. that will drop your numbers a little bit, but the shape is what you need to focus on and not the actual numbers. Correct me if my theory is incorrect, but I would think a larger tire and rim results in greater rotational weight which will use up horsepower, resulting in lower numbers than the same bike with a stock rear tire.

I kinda like the low number now. When I race someone next time and beat them, I can say I have only 88hp and I am hauling 1000lbs, go figure that one out.

Quote from: Budzo on Dec 04, 2010, 12:50:52 PMQuote from: TRaider_John on Dec 03, 2010, 10:02:13 PMBelive it or not, the contact patch will be the same if the rear tire pressure is the same. The weight of the bike is divided over the same number of square inches regardless of the tire size. The patch may change shape, but area x pressure = force.The diameter of the 300 is larger than a 240 so the torque arm will be a little longer and that means a little less force will be seen by the Dino drum. that will drop your numbers a little bit, but the shape is what you need to focus on and not the actual numbers. Correct me if my theory is incorrect, but I would think a larger tire and rim results in greater rotational weight which will use up horsepower, resulting in lower numbers than the same bike with a stock rear tire.I have seen a calc on tire size for Drag racers. I will look for it. But your are spinning a gyro effect so it should roll even better once it gets rolling, it has more weight to slow down too.