Trek Checkpoint Plus Range?

[Nomadmax]

This could very well be a "how long is a piece of string?" question. And if it is, I understand.

I have an Allant 8s that I use for errands and the occasional zone 2 ride in-between my hard, non electric road/gravel bike rides. I'm considering a Trek Checkpoint Plus SL5 e-gravel bike but wonder about the range.

My question, is it possible to roughly extrapolate the range of the Checkpoint based on my ride on the Allant today?

I started with 100% charge on the Allant. Rode 34.01 miles, at 15.97 mph average, with 1352 feet of climbing. I was in zones 1 and 2 for the entirety of the ride and it was very, very windy (gusts over 30mph with a steady 10-15). I started with 100% charge and ended with 20%.

My thinking is the Checkpoint has a smaller battery, but;

Will have clipless SPD pedals and real cycling shoes. Not running shoes and flat pedals
Will have drop bars and not have me sitting bolt upright in the wind
Weighs at least 20 pounds less than the Allant and has much less rotating weight
Has the geometry/body position of my regular bikes that will allow me to add human power more efficiently

I'm kinda stuck on the idea that if it can't pull off 35-40 miles in these conditions while still allowing me to go easy, I'd probably skip it. The Allant is a great bike but it's an around town commuter for me. Spending two hours or more on it in one sitting isn't my idea of a good time.

 

[BlackHand]

So you used a little over 14wh/mile on that ride. (608 nominal wh/34 mi). Was the wind a headwind or tailwind or was this an out and back route?

The same consumption on the Checkpoint+ 360wh battery would net you a little over 25 miles. You would need about 10.5wh/mile on the Checkpoint+ to do the same 34 mile ride. That doesn't seem unreasonable.

FWIW, I alternate between a heavy Haibike Trekking 9.0s and a lighter Bulls Desert Falcon. The Bulls is very similar geometry to the Checkpoint+ you are looking at but with skinnier road tires and 10lbs heavier. I go faster at lower assist and put out less effort on the Bulls than on the Haibike. ~5ish wh/mi is exercising. 7-8wh/mi is mild work. 10+ is cruising and not really thinking about it- I might use that much on a morning commute with lots of accelerations and keeping it above 22mph where possible.

 

[Nomadmax]

So you used a little over 14wh/mile on that ride. (608 nominal wh/34 mi). Was the wind a headwind or tailwind or was this an out and back route?

The same consumption on the Checkpoint+ 360wh battery would net you a little over 25 miles. You would need about 10.5wh/mile on the Checkpoint+ to do the same 34 mile ride. That doesn't seem unreasonable.

FWIW, I alternate between a heavy Haibike Trekking 9.0s and a lighter Bulls Desert Falcon. The Bulls is very similar geometry to the Checkpoint+ you are looking at but with skinnier road tires and 10lbs heavier. I go faster at lower assist and put out less effort on the Bulls than on the Haibike. ~5ish wh/mi is exercising. 7-8wh/mi is mild work. 10+ is cruising and not really thinking about it- I might use that much on a morning commute with lots of accelerations and keeping it above 22mph where possible.

It was a four corner circuit of just over eight miles each lap, so sometimes a block headwind, then side wind and tail wind. I may go over to the Trek dealer and see what the owner has to say. (Not a Trek owned store).

They do make a spare battery for it that's 160 wh but it's probably 700 bucks all in and you lose a bottle cage. That's a lot of scratch to basically do what I already can with the Allant, albeit more comfortably. It's between riding the Allant and staying indoors on the trainer for the easy days. And I'm kinda tired of the trainer from winter.

Thank you for the reply.

 

[stompandgo]

Get the range extender and don't worry about range. You can do all the math in the world but you really won't know your range until you ride it a bunch of times under varying conditions. There are too many variables.