Search: Posts Made By: Dunbar
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03-10-19, 07:14 PM
Replies: 10
Views: 1,570
Posted By Dunbar

If you donít need the folding function, and just...

If you donít need the folding function, and just want a compact e-bike, there are a few compact e-bikes with 20Ē wheels that do not fold and therefore should be sturdier.
12-12-18, 02:11 PM
Replies: 9
Views: 1,098
Posted By Dunbar

Lithium-ion batteries all last about 400-500...

Lithium-ion batteries all last about 400-500 cycles if you charge them to 100% before they lose a significant amount of their capacity. I donít think the ST1 battery is $1200. Itís a nice bike but...
12-08-18, 05:07 PM
Replies: 14
Views: 1,159
Posted By Dunbar

Do you own a Bosch performance line e-bike? I’ve...

Do you own a Bosch performance line e-bike? I’ve test ridden several myself including a Trek Super Commuter 8. Any sort of headwind on that bike and you weren’t getting anywhere near 28mph on the top...
12-07-18, 03:58 PM
Replies: 14
Views: 1,159
Posted By Dunbar

How many watts do you think it takes to cruise at...

How many watts do you think it takes to cruise at 28mph on a typical class 3 e-bike? On a road bike with a decent aero position it’s going to take ~450-500 watts. I’m not claiming the Bosch...
12-01-18, 06:38 PM
Replies: 24
Views: 2,448
Posted By Dunbar

I was killing the Garmin HR soft straps every 6...

I was killing the Garmin HR soft straps every 6 months from my sweat. After I got a power meter I stopped riding with HR. I remember hearing that the rigid ones last a lot longer but they arenít as...
12-01-18, 06:17 PM
Replies: 14
Views: 1,159
Posted By Dunbar

What I meant was that the 500-550W of the Bosch...

What I meant was that the 500-550W of the Bosch Systems is not enough power to cruise at 28mph most of the time. If you have a tailwind or slight decline it’s possible to hit 28mph (the bike will...
11-28-18, 01:24 PM
Replies: 14
Views: 1,159
Posted By Dunbar

Yeah, the Bosch systems top out around 500-550W...

Yeah, the Bosch systems top out around 500-550W which is not enough to cruise at 28mph. Although some of their systems are designed to top out at 20mph assisted so theyíll likely spin out long before...
Forum: Commuting
10-28-18, 11:44 AM
Replies: 23
Views: 586
Posted By Dunbar

Just FYI, if youíre charging that battery 100%...

Just FYI, if youíre charging that battery 100% twice per day you will burn it out a lot faster. Youíll get 400-500 charge cycles before the battery is down 50% of capacity. Bosch charges $1k for a...
10-25-18, 04:05 PM
Replies: 27
Views: 1,586
Posted By Dunbar

James O’Keefe the cardiologist (not that...

James O’Keefe the cardiologist (not that undercover reporter) has done some research on this. He certainly gave me some pause. I heard a more recent interview with him on Sirius XM Doctor Radio and...
10-09-18, 04:47 PM
Replies: 9
Views: 1,131
Posted By Dunbar

Trek and Cannondale have announced some Bosch...

Trek and Cannondale have announced some Bosch powered electric-assist road bikes at Interbike. The Domane+ is the first carbon fiber electric assist road bike I’ve seen being offered in the US. The...
03-29-18, 01:54 PM
Replies: 5
Views: 825
Posted By Dunbar

Check out the TSDZ2 mid-drive kits. They have a...

Check out the TSDZ2 mid-drive kits. They have a torque sensor and they have different power options up to 48-52V 18A. I would recommend going with the most powerful option and lower the the pedal...
03-29-18, 12:12 PM
Replies: 5
Views: 825
Posted By Dunbar

Cadence sensors generally apply full assist once...

Cadence sensors generally apply full assist once a certain cadence is detected. Think of it more like an on/off switch triggered by pedal rotation. I much prefer to ride a torque sensing bike (it...
03-29-18, 12:02 PM
Replies: 11
Views: 1,602
Posted By Dunbar

It depends on how fast you want to go. I have a...

It depends on how fast you want to go. I have a fairly large 835Wh battery on my Cross Current. On the top assist level (600-700W of continuous assist power) I can go about 30 miles. Figure 30-35Wh...
03-26-18, 12:24 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

For one thing, thereís a bicycle lane next to the...

For one thing, thereís a bicycle lane next to the two traffic lanes. If the AV was respecting the lane markers a cyclist would be fine. If the AV was transitioning through the bicycle lane to make a...
03-26-18, 12:17 PM
Replies: 61
Views: 3,501
Posted By Dunbar

This is something I try hard to avoid - zoning...

This is something I try hard to avoid - zoning out towards the end of a ride as you fatigue. You think that youíre in a low risk situation so itís tempting let your attention wander. It doesnít help...
03-23-18, 01:40 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

They look like HID low beams to me which are...

They look like HID low beams to me which are actually pretty good headlights (they could also be LEDís). They put out 2-3X as much light as the yellowish halogen lights you see on most cars. The beam...
03-20-18, 01:49 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

To be fair he wasnít driving for Uber. He was the...

To be fair he wasnít driving for Uber. He was the backup driver in a test vehicle with no paying passengers ever being allowed in it. Itís not great from a PR standpoint for Uber but, as I understand...
03-20-18, 10:20 AM
Replies: 3,008
Views: 109,819
Posted By Dunbar

Iím also starting to wonder if she was homeless....

Iím also starting to wonder if she was homeless. The streets around where I live are very dimly lit. It is very hard to see someone who pops out of the shadows in those conditions. I have to be extra...
03-19-18, 07:55 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

The police are saying the woman was walking her...

The police are saying the woman was walking her bike across the street from the center median (west-to-east). It seems like she may have just walked out in front of the Uber self-driving car while...
03-19-18, 07:39 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

OK, but that gets back to the point of why there...

OK, but that gets back to the point of why there would be paved area of the median that looks a lot like sidewalk in the first place? Why not just leave it landscaped with gravel and plants? It just...
03-19-18, 06:55 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

It does seem odd to have signs that say ďuse...

It does seem odd to have signs that say ďuse cross walkĒ when thereís no obvious way to get to the cross-walk due to the landscaping. Not to mention youíre on a median so itís not clear to me what...
03-19-18, 06:00 PM
Replies: 3,008
Views: 109,819
Posted By Dunbar

Edit, the news stories say she was crossing the...

Edit, the news stories say she was crossing the street on foot from west to east. Iím not sure this has much to do with cycling. I see pedestrians crossing mid-block all the time to avoid walking the...
03-19-18, 05:08 PM
Replies: 62
Views: 3,667
Posted By Dunbar

The person hit by the car posted this over on...

The person hit by the car posted this over on Electric Bike Review. My personal opinion is not to put yourself next to a car if it can turn right. Speed up, slow down or take the lane. That bike lane...
03-19-18, 03:55 PM
Replies: 12
Views: 2,671
Posted By Dunbar

Go ride a 50-60lb Ďregularí bike and youíll have...

Go ride a 50-60lb Ďregularí bike and youíll have an idea. Itís not fun. Once my ~55lbs. e-bike died 7 miles from home and it was absolutely brutal to ride home unassisted. And my ebike has a geared...
03-19-18, 03:44 PM
Replies: 6
Views: 1,303
Posted By Dunbar

The controller is what determines how much power...

The controller is what determines how much power gets sent to the motor. The nominal motor wattage ratings donít tell you much. My Juiced Bikes Cross Current has a 350W Bafang motor but the...
03-19-18, 03:39 PM
Replies: 7
Views: 1,292
Posted By Dunbar

At night I use the 150 in the continuous mode...

At night I use the 150 in the continuous mode with the brightness turned way down. I have a second ~$10 rechargeable flashing light I use in conjunction with the 150 at night. During the day Iíll use...
06-07-17, 09:31 PM
Replies: 14
Views: 4,507
Posted By Dunbar

Trek is also making an electric version of the...

Trek is also making an electric version of the Cross Rip. A lot of the electric road bikes are adapted from flat bar hybrid frames so the geometry isn't ideal for drop bars.
05-21-17, 05:37 PM
Replies: 17
Views: 1,231
Posted By Dunbar

You could always wire up a relay and use the the...

You could always wire up a relay and use the the controller + button to switch the light on/off. However, you wouldn't think that LED's are going to draw that much current.
05-07-17, 07:53 PM
Replies: 17
Views: 10,382
Posted By Dunbar

Nominal motor rating also doesn't tell you peak...

Nominal motor rating also doesn't tell you peak system power. What you want to look for is the peak power output of the bike or, as mentioned, the maximum continuous current output of the controller....
04-30-17, 04:15 PM
Replies: 57
Views: 9,263
Posted By Dunbar

According to this video they do actually offer...

According to this video they do actually offer the bike with a nuvinci hub at a lower cost.

https://www.youtube.com/watch?v=VTdfmaQvidQ
04-28-17, 01:01 PM
Replies: 32
Views: 16,038
Posted By Dunbar

Basically I'm saying that if you double the...

Basically I'm saying that if you double the system power (as is the case of Hyper Fat vs. Cross Current) the bike will climb better. Especially if you hit the hill with momentum like in the Hyper Fat...
04-24-17, 12:45 PM
Replies: 8
Views: 1,735
Posted By Dunbar

4kW e-bikes aren't legal anywhere AFAIK except...

4kW e-bikes aren't legal anywhere AFAIK except "off road".
04-23-17, 10:45 PM
Replies: 25
Views: 5,237
Posted By Dunbar

At 6'5" you probably want a 22" frame which is...

At 6'5" you probably want a 22" frame which is going to limit your options. Stromer offer their bikes in that frame size.
04-18-17, 12:59 PM
Replies: 32
Views: 16,038
Posted By Dunbar

You also lose the torque sensor when you go the...

You also lose the torque sensor when you go the DIY route. A good torque sensor transforms the riding experience IMO.
04-17-17, 01:21 PM
Replies: 32
Views: 16,038
Posted By Dunbar

The short answer is no. Hub motors are...

The short answer is no. Hub motors are essentially one speed transmissions. They can be geared/wound for low end torque, or high speed cruising, but not both. This fact is compounded when you run a...
Forum: Commuting
03-24-17, 02:38 PM
Replies: 30
Views: 2,590
Posted By Dunbar

I had 700x35 Voyager Hyper tires on a previous...

I had 700x35 Voyager Hyper tires on a previous bike and the combination of lower weight and very good rolling resistance was impressive. I didn't think that they gave up much to my 700x25 GP4000S's...
03-24-17, 10:42 AM
Replies: 33
Views: 3,025
Posted By Dunbar

If you can DIY all of your own car maintenance...

If you can DIY all of your own car maintenance yes you are at a huge advantage to the average person when it comes to running costs. Keep in mind that most $700 cars would not be considered reliable...
03-23-17, 03:26 PM
Replies: 87
Views: 6,283
Posted By Dunbar

In a perfect world I wish the rules limited just...

In a perfect world I wish the rules limited just speed and not power. Even 1000W is not that much if you're riding into a strong headwind. I don't think most people understand how the controllers...
03-23-17, 01:42 PM
Replies: 33
Views: 3,025
Posted By Dunbar

Those are all factors that you need to include in...

Those are all factors that you need to include in your cost-benefit when determining if living car free makes sense for you. Getting rid of my car would save me $300-400 per month. I live in an urban...
03-23-17, 12:26 PM
Replies: 33
Views: 3,025
Posted By Dunbar

You can get a pretty good e-bike for ~$1100. Just...

You can get a pretty good e-bike for ~$1100. Just like with road/mountain bikes you can also spend a lot more than that. You should test ride a good pedal assist e-bike. One of the biggest...
Forum: Road Cycling
03-22-17, 10:31 PM
Replies: 76
Views: 3,256
Posted By Dunbar

He actually started the conversation so I felt...

He actually started the conversation so I felt less weird. Plus it was a long red light so we were talking for a while before brought it up. This guy is very active in the club ride scene so he's...
Forum: Road Cycling
03-22-17, 04:04 PM
Replies: 76
Views: 3,256
Posted By Dunbar

BTW, I get kudos from random people too. I think...

BTW, I get kudos from random people too. I think they use the flyby feature to look me up after a ride. It would be pretty easy for them to spot me on Strava using my profile picture.
Forum: Road Cycling
03-22-17, 03:55 PM
Replies: 76
Views: 3,256
Posted By Dunbar

I actually freaked out a local Strava "legend" a...

I actually freaked out a local Strava "legend" a few weeks back. He started chatting with me at a red light and I was like "hey, you're so-and-so" and he gave me a strange look since we had never met...
03-22-17, 03:45 PM
Replies: 33
Views: 3,025
Posted By Dunbar

Smart phones and laptop computers aren't immune...

Smart phones and laptop computers aren't immune from the problem either. Not to mention all of the cordless tools that use 18650 lithium ion battery packs. I bet most of us don't store our...
Forum: Commuting
03-22-17, 03:25 PM
Replies: 30
Views: 2,590
Posted By Dunbar

Like I said, it's noticeable when you stop...

Like I said, it's noticeable when you stop pedaling on flat ground. Not when you are pedaling. But thanks for the snark.

25mm@80psi the difference is more like 17 watts worse for a pair of...
03-22-17, 12:28 PM
Replies: 33
Views: 3,025
Posted By Dunbar

Almost all bikes parts are made in China these...

Almost all bikes parts are made in China these days. I don't think it's fair to say that it is all junk but it's up to the manufacturer/reseller to enforce QC standards.
03-22-17, 11:51 AM
Replies: 33
Views: 3,025
Posted By Dunbar

$2500 bike according to the article. Could it be...

$2500 bike according to the article. Could it be a Pedego?
03-22-17, 11:48 AM
Replies: 38
Views: 3,552
Posted By Dunbar

How fast is it on the highest setting? Do the...

How fast is it on the highest setting? Do the smaller wheels limit your top cruising speed while pedaling?
03-22-17, 11:47 AM
Replies: 87
Views: 6,283
Posted By Dunbar

E-bike checkpoints sounds rather Orwellian to me....

E-bike checkpoints sounds rather Orwellian to me. E-bikes being sold in stores have to comply with the law and list the bike classification on the frame. DIY kits are a different story as the sellers...
03-22-17, 01:03 AM
Replies: 87
Views: 6,283
Posted By Dunbar

Street legal e-bikes are supposed to have their...

Street legal e-bikes are supposed to have their class number displayed on the frame. Mine has "class 3" printed on it. It's completely unenforced though. Police officers in LA don't have time to...
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