Grin All Axle - Fat on Wallke X3 Pro

[CastroSF]

I have a 2020 X3 pro - and looking to upgrade the controller and motor to the Grin Tech All Axle motor... its seems to be the best fit for me. I like taking long rides (50-100miles on / off road through SF, Marin Headlands, Oregon etc... wherever). and I really need the best regen possible. Has anyone had experience with this conversion on a similar bike? One thing I like about grin is the regen can be controlled with the brake levers and come to a complete stop with regen. whereas the Wallke regen doesn't kick in until you are going 14mph or so, and if you are in PAS 1 its always on so if you want to go faster you must increase the PAS to 2/3 or hit the throttle... so its wonky at best and the battery SOC fluctuates wildly (understandable and it does balance out after a minute). But when you are 10 miles out on dirt roads it's nice to know how far you're gonna pedal that 80lb bike ha! appreciate experiences and thoughts about this conversion. Thanks.

I know a lot has changed since 2020- but I still haven't found bike that has:
folding
full suspension
fat tire
regenerative braking

 

[JRA]

I had a 1st gen All Axle Grin front hub system installed on a Specialized drop bar 40c tired bike with a 14.5ah battery and the best I could get out of it at a mild pace (15mph avg, 15wh/mi avg) in hilly terrain was 35miles. I controlled the wattage via a throttle and the "cruise control" feature that their controller allows for. I had the regen set pretty aggressively and it was the first option I would apply when needing to slow down but never really noticed that great an improvement in wh/mi frankly but it was a great brake pad saver and worked well for keeping speed down on long grades if applied intermittently and was the first braking I used when approaching a stop. However like any regen system if applied for too long it will heat up the motor and controller which can cause problems so not recommended for long term use I would say.

In conclusion I would recommend the system but if you plan on that type of mileage with fat tires you will probably need at least twice the battery ah that I had? You probably know better based on your current setup however? But even with an aggressive regen set you will probably not gain all that much out of it mileage wise would be my guess.

 

[Slaphappygamer]

On my BR/CA set up, I control regen by simply pressing the down button below 0, if going over 8MPH. Below 0 PAS, you have “steps” of regen that you can invoke. No need to even touch the brake lever. I really like that. I still can opt to use the brake lever to invoke regen, then the throttle varies the regen intensity. Which I do use, from time to time.

I agree with the above in that you will need a bigger battery to account for the increased rolling resistance of fat tires.

The best regen I got on a single 4 mile ride was 15%. Usually, I get 8-12%. I live in a hilly area and total weight of bike and rider are around 260lbs.