I would suggest you get the 0-30 in/lb wrench. A torque wrench is most accurate at the middle of its range and even going to the 75 in/lb wrench wouldn't really help with much other stuff anyways.
As for the socket, you'll just need to get a 3/4" to 1/2" adapter then a 1/2" to 3/8" adapter then finally a 3/8" to 1/4" adapter in order to check the rolling resistance and the adapters won't affect your reading since you are checking "torque" but rather rolling resistance. It would be better if you had a 1/2" socket for the pinion nut then you would only need 2 adapters rather than 3 but like I said it's no worry.
As for the socket, you'll just need to get a 3/4" to 1/2" adapter then a 1/2" to 3/8" adapter then finally a 3/8" to 1/4" adapter in order to check the rolling resistance and the adapters won't affect your reading since you are checking "torque" but rather rolling resistance. It would be better if you had a 1/2" socket for the pinion nut then you would only need 2 adapters rather than 3 but like I said it's no worry.
