The XM3500 thread is getting really long, so I pulled out some comments from it and started a new thread. I would especially like to see actual performance data posed in this thread, and would like to see the battery & charging discussions move to another thread.
I had someone follow me in a car and what I found was (scooter versus car) 10 mph was 10 mph, 20 mph was 20 mph, 30 mph was 30 mph, 40 mph was 35 mph, and 50 mph was 42 mph.
This time I did reach 55 mph according to the speedometer; however, the real speed (as measured by a car) was 44 mph.
The actual distance is 10.0 miles; the odometer read 19.6 miles traveled.
Henry, thanks for taking the time to collect the data on your scooter. The odometer is in Km, so 19.6 km = 12.2 miles => odo is 22% high based on this data.
I made a table with the actual and indicated speeds, along with a conversion of the indicated speed based on the 22% odometer error:
I would of expected the actual to be more like the odo_corr column. If the data is correct then the speedometer is very non linear: Apparently increasing indicated speed from 20 to 30 mph is a 10 mph actual increase, but from 30 to 40 indicated is only 5 mph actual increase. Then from 40 to 50 indicated changes the actual by 7 mph! Weird! Henry, it’s got to be difficult to get accurate readings while riding and communicating with a driver. Do you think the data for the first 3 speeds could be wrong? The last three actual and odo corrected values are pretty close. Does anyone else have data? John, can you give provide odometer readings for the same route for your car and XM3500Li so we can compare odo accuracy to Henry’s data?
Yes, the bike does have a form of ABS. However, this is not like the ABS in your car. In your car the ABS senses when the wheel is locked and releases and then reapplies the brakes. The ABS provided on this bike (and on lots of other gasoline powered scooters) works by attempting to prevent the locking of the wheel in the first place - I believe it works by reducing the braking force applied via the calipers (think of it a bit like a safety valve). I will research more about this form of ABS.
As a prospective buyer of an XM3500Li, I am also concerned about features not matching the advertised specs, and have the following comments about the 4 features discussed:
REGEN: I like having regen, but it’s really not important. I’d like to know what I’m buying, but it would not affect my decision to buy either way.
ABS: Apparently it has ABS, but if John’s description above is accurate, it sounds pretty scary. I’d rather not have it than have something that will decrease my braking force, possibly when I need it the most. Not an issue if it works well, but the description makes me nervous.
BMS: I don’t have a firm grasp of the battery issues with LFP. Based on the discussion so far, I’d say the jury is out.
TOP SPEED: This is the killer argument against this scooter for me – too slow! My current e-scooter can go about 42 mph actual. That keeps me struggling to keep up on roads that have a 40 mph speed limit, which is common in the town I live in. If the posted speed is 40, cars will often be traveling 45 – 50. Most of the main streets are posted as 35 or 40 mph. With the XM3000 being only about 2 mph slower than the XM3500Li, and it being half the price, it does not seem worth the price differential. More important for me is that is just doesn’t provide enough speed to be safe – it’s dangerous to have cars trying to go around you all the time. However, we only have actual top speed information from one V member at this point AFAIK, so I'd really like to have some more data points before I conclude it's really too slow.