5 ms·

This bike has the added benefit of being theft resistant - on the basis that it's too heavy for one person to lift. Seriously though, what does it weigh? With

by blunte 5y ago

This bike has the added benefit of being theft resistant - on the basis that it's too heavy for one person to lift. Seriously though, what does it weigh? With a typical sized Dutch man, stopping from full speed is going to be a real test of the brakes... For the same reason I don't like scooters on bike paths, I wouldn't want this sharing a bike path with me. When heavy fast vehicles and regular bikes collide, the regular biker usually suffers more.

Havoc 5y ago
>stopping from full speed is going to be a real test of the brakes... I'm sure it'll be fine if you stick some high end mountain biking disk brakes on there. I suspect you could also use the moter to bring it to a sharpish stop.
- jacquesm 5y ago
  It's got large diameter hydraulic disc brakes, there clearly is a bit of a difference with the added battery weight but it stops just fine (still way faster than my 10 speed with rim brakes in spite of the much higher bike weight). The fat tires (2 1/4") also really help with that.
jacquesm 5y ago
About 35 to 36 Kg. Bike + rider is 105K, which is actually not that bad. Your typical parent+bike+two kids is a lot heavier, I've had my 'daddy bike' up to well over 130 Kg before one of the kids was old enough to ride by themselves. Full speed to stop is pretty good too, I did a couple of e-brakes to see how the change of weight and COG affected the bike. Stopping distance is a bit longer, it doesn't kick out when braking hard in a corner more than it did before, and - not surprisingly ;) - it transfers a bit more weight to the front when you hit the brakes hard. But compared to a scooter it is much lighter and compared to a normal e-bike it is only 5 Kg heavier (29 vs 35 Kg).
- nousermane 5y ago
  That is impressively light. My opafiets is 30kg.
  - jacquesm 5y ago
    All aluminum bike really helps, as well as a relatively small frame size. But still, the battery makes it noticeably heavier.
- 1-more 5y ago
  haha I'm more than that on my road bike and I'm stopping with rim brakes. This is incredibly impressive work; congratulations! Can't wait to see the update. I suspect you're going to be just fine on water ingress based on what the inside of the package looks like.
  - jacquesm 5y ago
    The tricky spots are the front top where the cables run over the top of the pack, that's a perfect spot for water to seep in and at the very bottom where the spray from the wheels hits the bottom of the pack. Once it's properly sealed that won't be an issue though, but in this experimental phase I'm eyeing the skies carefully before a ride to make sure I won't end up being drenched. A couple of spatters it will definitely survive but a full-on Dutch-dunking could well be problematic.
turtlebits 5y ago
Bare weight of the cell is 50g. With 170 cells that is is 8.5kg. Still considerably lighter than cargo e-bikes.
- jacquesm 5y ago
  And 40 of those cells can be discounted because they were also present in the old pack.
GhettoComputers 5y ago
People steal cars and motorcycles that are heavier. If you leave it out and think it’s too heavy to be stolen you’re living in a much friendlier place than me, electronic transport isn’t even always sought after for personal gain. Scooters are routinely thrown in the water around the world. https://www.wtsp.com/article/news/local/hillsboroughcounty/scooters-removed-from-hillsborough-river-tampa-riverwalk/67-a94a03da-0310-44bc-9557-8f6b2ed5250a https://www.wtsp.com/article/news/local/hillsboroughcounty/s... https://www.electrive.com/2021/06/17/hundreds-of-scooters-lay-deep-in-the-river-rhine/ https://www.electrive.com/2021/06/17/hundreds-of-scooters-la... https://www.kcrg.com/2021/06/03/teen-arrested-for-throwing-e-scooter-from-bridge-into-cedar-river/ https://www.kcrg.com/2021/06/03/teen-arrested-for-throwing-e...

by blunte 5y ago

Havoc 5y ago

>stopping from full speed is going to be a real test of the brakes... I'm sure it'll be fine if you stick some high end mountain biking disk brakes on there. I suspect you could also use the moter to bring it to a sharpish stop.

jacquesm 5y ago
It's got large diameter hydraulic disc brakes, there clearly is a bit of a difference with the added battery weight but it stops just fine (still way faster than my 10 speed with rim brakes in spite of the much higher bike weight). The fat tires (2 1/4") also really help with that.

jacquesm 5y ago

About 35 to 36 Kg. Bike + rider is 105K, which is actually not that bad. Your typical parent+bike+two kids is a lot heavier, I've had my 'daddy bike' up to well over 130 Kg before one of the kids was old enough to ride by themselves. Full speed to stop is pretty good too, I did a couple of e-brakes to see how the change of weight and COG affected the bike. Stopping distance is a bit longer, it doesn't kick out when braking hard in a corner more than it did before, and - not surprisingly ;) - it transfers a bit more weight to the front when you hit the brakes hard. But compared to a scooter it is much lighter and compared to a normal e-bike it is only 5 Kg heavier (29 vs 35 Kg).

nousermane 5y ago
That is impressively light. My opafiets is 30kg.
- jacquesm 5y ago
  All aluminum bike really helps, as well as a relatively small frame size. But still, the battery makes it noticeably heavier.
1-more 5y ago
haha I'm more than that on my road bike and I'm stopping with rim brakes. This is incredibly impressive work; congratulations! Can't wait to see the update. I suspect you're going to be just fine on water ingress based on what the inside of the package looks like.
- jacquesm 5y ago
  The tricky spots are the front top where the cables run over the top of the pack, that's a perfect spot for water to seep in and at the very bottom where the spray from the wheels hits the bottom of the pack. Once it's properly sealed that won't be an issue though, but in this experimental phase I'm eyeing the skies carefully before a ride to make sure I won't end up being drenched. A couple of spatters it will definitely survive but a full-on Dutch-dunking could well be problematic.

turtlebits 5y ago

Bare weight of the cell is 50g. With 170 cells that is is 8.5kg. Still considerably lighter than cargo e-bikes.

jacquesm 5y ago
And 40 of those cells can be discounted because they were also present in the old pack.

GhettoComputers 5y ago

People steal cars and motorcycles that are heavier. If you leave it out and think it’s too heavy to be stolen you’re living in a much friendlier place than me, electronic transport isn’t even always sought after for personal gain. Scooters are routinely thrown in the water around the world. https://www.wtsp.com/article/news/local/hillsboroughcounty/scooters-removed-from-hillsborough-river-tampa-riverwalk/67-a94a03da-0310-44bc-9557-8f6b2ed5250a https://www.wtsp.com/article/news/local/hillsboroughcounty/s... https://www.electrive.com/2021/06/17/hundreds-of-scooters-lay-deep-in-the-river-rhine/ https://www.electrive.com/2021/06/17/hundreds-of-scooters-la... https://www.kcrg.com/2021/06/03/teen-arrested-for-throwing-e-scooter-from-bridge-into-cedar-river/ https://www.kcrg.com/2021/06/03/teen-arrested-for-throwing-e...