British Cycling are the owners of the largest stock of InfoCranks® globally with over 100 sets of 24mm InfoCranks, ranging from the earliest to the latest models.
Their policy is to load test every crank (and previously used power meters also) when it is brought into service and keep a record of the parameters from the test. The testing procedure is confidential, but Verve is privy to the results in general for InfoCrank® and other devices and to any InfoCrank® discrepancies.
The basic outline of the test is that known force is applied in increments of 50nm from zero load to whatever is chosen for the cranks, with a maximum of 500nm. The cranks are in diagnostic mode which allows the British Cycling boffins to also work out the watts. 500nm is equal to 3000 watts.
Suffice to say that the characteristics of the Road InfoCrank® are unlike any other device tested. All Road InfoCranks exhibit the same characteristics;
low error compared to the true force. At all times well within InfoCrank® specifications.
the error is consistent regardless of the force applied.
Each InfoCrank® is the same as any other InfoCrank®
When re-tested at lengthy intervals, the same results are achieved.
Maybe, most importantly of all – InfoCrank® responds instantly to the change in force and then remains stable.