I just completed my longest ride ever (by a good margin). 44 miles! Thanks to
@Douglas Ruby and others for the tips and encouragement!
Bike is a 2016 Turbo X (250W) with the 691 Watt hour battery. I was trying to do the full commute from home to work for the first time ever. 44 miles, only about 600 ft of climbing, 15+ miles of dirt/gravel along the way, tons of beautiful and remote shoreline, and at least 8 bridges to cross!
My previous (shorter) rides indicated (using simple math) that Eco40 would not yield sufficient range to make it. I hadn't tried Eco30 and didn't know how much difference that would make.
I started off fully charged in Eco30 and watched the battery consumption and range carefully. At about mile 3, I was at about 96% but I shut the bike off for a train crossing. When I turned it back on, it read 100% again. Weird!
Around mile 9, I was at about 90% or high 80s so I was very happy with the forecasted range. Around miles 16-20, I was tracking somewhere in the expected total range of 70 miles, so I knew I was in great shape. By mile 30, I was still tracking well with 56% left (estimated range of 60 miles with a margin for safety). I wanted to improve my speed a little, so I kicked it up to Eco40 for the last 14 miles. I ticked along at roughly 2% per mile for that last 14 miles, which means that I *might* have been able to make it the whole way in Eco40, but it would have been closer than I'd like for my first attempt. Crossover point where Eco# = trip mileage # was about 38 (i.e., 38% left at 38 miles in). Final battery charge at the end = 28%.
A few things that might have helped with the range:
- used Eco30 for the first 30 miles
- temps were above 50F the entire time (started at about 51 and got a bit warmer as I went)
- much of the ride is open trail with no stops/lights
- I did not bring my usual pannier and instead put everything (incl. laptop) in my Osprey backpack (I did miss the pannier and would like to try it next time)
- I tried to spin more by using one gear lower (easier/larger sprocket) than usual, which also reduced my cruising speed (as did the lower assist level)
A few things that probably used more battery than a perfect scenario:
- I rode a good portion of the way on dirt/gravel paths, which means more friction/rolling resistance than pavement
- There were still some lights/stops
- On the trail sections, I had to slow down for a number of 90-degree turns, bridge access, etc.
- A few small hills but very flat overall (only about 600' total climbing)
Final Stats:
43.92 miles
2:22 moving time
2:29 total time
18.5 mph average speed
For comparison, I did a very similar route on my gravel (non-e) bike last summer and it took me 20 minutes longer and my average speed was 16.5 mph.