In July 2017, the NZ Transport Agency published Research Report 621 (Regulations and safety for electric bicycles and other low-powered vehicles). As part of that, we predicted e-bike sales in New Zealand based on what had been happening up until 2016 in New Zealand and Europe. Four future scenarios were used for our predictions (low to extreme growth) and with the 2019 data now available from Stats NZ (warning - the extraction of data is complex!), we thought we would have a look how actual data track against our predictions.
The above graph shows actual data overlaid onto Figure 4.6 from the 2017 research report. There are a bunch of caveats. Customs NZ changed the classification codes in 2017 (see codes 8711.60 and 8711.90 of the tariff document) and it's somewhat murky what exactly gets counted. Customs has advised us that it is likely that e-scooters are being included, and make up about 40% of the sales. So e-bikes are probably tracking around the "High growth" line. Another way to try and gauge the growth of e-bikes is through observational surveys - we've done a few but are working on getting a project off the ground that will focus on the speed and gender of people riding un-assisted & electric assist bicycles.