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Search: Posts Made By: Doc_Wui
Showing results 1 to 50 of 1000
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Forum: Electric Bikes
05-04-24, 07:57 AM
Replies: 15
Views: 1,214
Posted By Doc_Wui

I've been to those places, Mickelson. Wisconsin,...

I've been to those places, Mickelson. Wisconsin, Iowa, Minnesota, gravel roads, etc, with my beater ebike conversions. Poking along at 12 mph, I don't need much power. Rail Trails were intended for...
Forum: Electric Bikes
05-04-24, 07:06 AM
Replies: 160
Views: 12,043
Posted By Doc_Wui

I was skeptical about potting the cells, because...

I was skeptical about potting the cells, because of the vent issue, but I watched a Grin ebikes Video where the mad scientist in charge tried it, The cells still vented, and fhere was less fire. I'm...
Forum: Electric Bikes
05-04-24, 07:03 AM
Replies: 8
Views: 172
Posted By Doc_Wui

If the rent is dented, it's toast. If it's just...

If the rent is dented, it's toast. If it's just wobbling back and forth, that can probablt be trued with a spoke wrench.

Trueing a wheel is not hard and building one is more of the same. Takes...
Forum: Electric Bikes
05-03-24, 08:59 AM
Replies: 8
Views: 156
Posted By Doc_Wui

I won't store any of my ebike batteries in the...

I won't store any of my ebike batteries in the house, but I could make an exception for a Specialized.
Forum: General Cycling Discussion
04-28-24, 11:58 PM
Replies: 24
Views: 715
Posted By Doc_Wui

-Used a crank arm puller and forgot to remove the...

-Used a crank arm puller and forgot to remove the bolt that held the arm.
-Mounting tires with the rotation arrow backwards.
-Cutting a threadless steerer tube a wee bit too short.
-Mounting an...
Forum: General Cycling Discussion
04-28-24, 11:45 PM
Replies: 3
Views: 195
Posted By Doc_Wui

I have used an XTC since 2015! One caution. Never...

I have used an XTC since 2015! One caution. Never get lazy and skip the pin on the center post/

I did that once, and the center post flipped down while I was on the freeway. Both bikes went...
Forum: General Cycling Discussion
04-28-24, 11:21 PM
Replies: 82
Views: 2,896
Posted By Doc_Wui

Used to irritate me when they didn't move over,...

Used to irritate me when they didn't move over, but kept on riding 2 abreast while yakking away on their bikes. Happens a lot around Chicagoland. Now I don't let it ruin my day,

Pretty much...
Forum: Electric Bikes
04-28-24, 03:41 PM
Replies: 5
Views: 352
Posted By Doc_Wui

I don't feel the excitement. Just a sadness that...

I don't feel the excitement. Just a sadness that bikes are too complicated for the American buyer..Gotta give them automatic downshifting and upshifting, plus a big motor to move it up to 20 mph, At...
Forum: General Cycling Discussion
04-18-24, 10:33 PM
Replies: 21
Views: 527
Posted By Doc_Wui

I like Shimano Trigger shifters as an upgrade....

I like Shimano Trigger shifters as an upgrade. Around $15-20l,
Forum: Electric Bikes
04-18-24, 10:22 PM
Replies: 6
Views: 394
Posted By Doc_Wui

I tried to get my wife to ride this 20x4" fat...

I tried to get my wife to ride this 20x4" fat tire ebike, but she thought it was too heavy. It was about 60+ pounds compared to her 40 lb 20x1.75" e-folder. I tried to like it, and it was OK with...
Forum: Electric Bikes
04-18-24, 10:05 PM
Replies: 3
Views: 260
Posted By Doc_Wui

Here you go. SRAM patent,...

Here you go. SRAM patent, (https://www.pinkbike.com/news/sram-patent-shows-compact-motor-x-battery-unit.html)

I count 28 cell holes, enough for a 52V7AH battery using 18650 or a 48V7AH if they...
Forum: General Cycling Discussion
04-16-24, 07:56 PM
Replies: 27
Views: 1,174
Posted By Doc_Wui

Is that 40 mile bike ride in NYC the Five Boro...

Is that 40 mile bike ride in NYC the Five Boro Bike Tour om May 5? Over 32000 riders, I've read. Five hours.

If so, have fun. Wish I was there and had a registration,
Forum: Electric Bikes
04-15-24, 10:43 AM
Replies: 3
Views: 503
Posted By Doc_Wui

Yikes. It's the Godzilla of ebikes. Terror on the...

Yikes. It's the Godzilla of ebikes. Terror on the bike paths. It's coming. I'm out of breath just watching it.

A couple of reliability/safety comments from an old geezer.
-Those folding stems...
Forum: Electric Bikes
04-15-24, 08:14 AM
Replies: 6
Views: 394
Posted By Doc_Wui

If you were a former biking enthusiast, I think...

If you were a former biking enthusiast, I think you wouldn't care for this bike, People who haven't ridden for years, on the other hand, don't have biking expectations, and will find fat tire bikes a...
Forum: Electric Bikes
04-08-24, 08:08 AM
Replies: 54
Views: 3,209
Posted By Doc_Wui

I see the purpose of the timer as a safety...

I see the purpose of the timer as a safety cutoff, in the rare event that the charger fails to shutoff. With most batteries, the BMS is what stops charging by refusing to accept any more current. As...
Forum: Electric Bikes
04-04-24, 09:25 AM
Replies: 9
Views: 671
Posted By Doc_Wui

"You can often tune the torque response, so that...

"You can often tune the torque response, so that it requires less pedal effort to get full power."

Yes, you can, I had tweaked up level 1 and 2, However, she said it was in the highest assist...
Forum: Electric Bikes
04-04-24, 09:19 AM
Replies: 19
Views: 940
Posted By Doc_Wui

Of the 3100 miles I rode last year, 560 were on a...

Of the 3100 miles I rode last year, 560 were on a regular 21 speed hybrid. This year, I am at 750/50 miles.
Forum: Electric Bikes
04-03-24, 06:21 PM
Replies: 9
Views: 671
Posted By Doc_Wui

My wife and I celebrate 49 years of marriage this...

My wife and I celebrate 49 years of marriage this summer. Since COvid, the two of us ride a lot more, and we get about 2400 miles together annually. Neither one of us is a hard core cyclist, but have...
Forum: Electric Bikes
04-02-24, 10:56 AM
Replies: 16
Views: 546
Posted By Doc_Wui

Yes it depends on how you use the battery. Most...

Yes it depends on how you use the battery. Most of the time, my rides are short enough that I don't go below half charge. Then I will recharge til the battery is full, unless I know I won't be riding...
Forum: Electric Bikes
03-18-24, 08:44 AM
Replies: 10
Views: 716
Posted By Doc_Wui

The only things I've bought from Grin is a pair...

The only things I've bought from Grin is a pair of 20" x 60mm" Weinman rims. Pretty hard to find, I think their GMAC geared motors are a flawed concept, Satiator too expensive, and their torque...
Forum: Folding Bikes
03-16-24, 10:16 AM
Replies: 1
Views: 401
Posted By Doc_Wui

Stem replacements?

I have two folders with the Downtube Nova threadless stems, and a Downtube FS8 with their 1 1/8" threaded stem. All seem pretty sturdy to me although the last one always had some play in the hinge...
Forum: General Cycling Discussion
03-15-24, 04:31 PM
Replies: 122
Views: 4,712
Posted By Doc_Wui

I learned last year that there are two types of...

I learned last year that there are two types of cyclists in the boonies. Those that carry TP and those that don't.




.
Forum: Electric Bikes
03-14-24, 09:13 PM
Replies: 10
Views: 716
Posted By Doc_Wui

Grin Technolog: Cheap cells are major cause of Ebike Fires.,

Grin Techbology's take on ebike fires and UL testing, March 13, 2024,

https://www.youtube.com/watch?v=j92Gt4VviSQ&t=2453s

The first part is the history , but you can skip to around the 30...
Forum: Electric Bikes
03-10-24, 02:34 PM
Replies: 160
Views: 12,043
Posted By Doc_Wui

Regarding those single bike NYC fatalities........

Regarding those single bike NYC fatalities..... We had one fall last year that was single rider, and could have been far worse. As it was, my wife cracked all her ribs on one side after hitting the...
Forum: Electric Bikes
03-02-24, 09:41 AM
Replies: 24
Views: 1,351
Posted By Doc_Wui

With regular bikes, having light/durable...

With regular bikes, having light/durable components makes a big difference, along with the weight. You want to be perfect,

With an ebike, having a motor covers up a lot of flaws. That's why there...
Forum: Electric Bikes
03-01-24, 10:13 PM
Replies: 24
Views: 1,351
Posted By Doc_Wui

Does the Giant have a throttle? Let her test ride...

Does the Giant have a throttle? Let her test ride it. You should ride it too.
Forum: Electric Bikes
02-29-24, 07:23 PM
Replies: 10
Views: 681
Posted By Doc_Wui

You must be in a bike shop. Would you take...

You must be in a bike shop. Would you take batteries from individuals to be picked up by Call2Recycle? Would they have to be in typical battery enclosures? Would you take these?
...
Forum: Fifty Plus (50+)
02-21-24, 10:50 AM
Replies: 55
Views: 4,292
Posted By Doc_Wui

Boy meets girl. Boy buys bike. Boy gets girl, ...

Boy meets girl. Boy buys bike. Boy gets girl,
50+ years later, they're still riding,
Forum: Electric Bikes
02-14-24, 10:52 AM
Replies: 30
Views: 1,420
Posted By Doc_Wui

A couple of our mopeds, if you wanna call them...

A couple of our mopeds, if you wanna call them that. Cheap ebiking,
https://cimg8.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/img_4612_d51c1c6b875f49e6676d3ed2402a0f0cb5da28f7.jpg
.
These...
Forum: Electric Bikes
02-11-24, 10:46 AM
Replies: 132
Views: 6,061
Posted By Doc_Wui

We'll be chugging along on sodium-ion or go back...

We'll be chugging along on sodium-ion or go back to less volatile LiFe packs in a few years, Maybe 2x-3X the volume for the former. I see that 18650 sized sodium cells are available now, and they are...
Forum: Electric Bikes
02-07-24, 12:11 AM
Replies: 7
Views: 418
Posted By Doc_Wui

All my bike conversions are ridden on pavement,....

All my bike conversions are ridden on pavement,. so I didn't have to worry about jumps and hard knocks of a battery on the frame. and never even considered the possibility that a mid motor could...
Forum: Electric Bikes
02-03-24, 12:54 PM
Replies: 9
Views: 813
Posted By Doc_Wui

People have wondered whether riding with a...

People have wondered whether riding with a throttle locked in cruise control uses less power than riding with cadence pedal assist at the same average speed, When I have tried it, the wattage...
Forum: Electric Bikes
01-14-24, 12:48 PM
Replies: 2
Views: 502
Posted By Doc_Wui

I reject on principle. Don't want my ebike to...

I reject on principle. Don't want my ebike to measure my blood oxygen, pulse, and blood pressure while I ride. If it's going to log data, have it watch the battery temperature and start blaring an...
Forum: Electric Bikes
01-04-24, 01:01 PM
Replies: 58
Views: 5,751
Posted By Doc_Wui

This is, in my opinion, one of the better...

This is, in my opinion, one of the better analysis of why batteries burst into flame. It's sometimes a charger or circuit failure. but all it takes is a random cell from a bad lot going thermal....
Forum: Fifty Plus (50+)
12-24-23, 09:55 PM
Replies: 7
Views: 656
Posted By Doc_Wui

It was pretty warm om the 21st here in Northern...

It was pretty warm om the 21st here in Northern Illinois. Around 50F. https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulletin/1080x810/dec21_97046541afa3458732dc1b9b3084b03d16493315.jpg
Forum: Electric Bikes
12-20-23, 09:15 PM
Replies: 37
Views: 3,106
Posted By Doc_Wui

On the amason questions page, someone asked if...

On the amason questions page, someone asked if this was a geared motor and a customer answered "Yes'. I think that from its size, it looks like it's geared. Direct Drives tend to be much bigger, and...
Forum: Electric Bikes
12-16-23, 02:50 PM
Replies: 4
Views: 1,268
Posted By Doc_Wui

If it were a Trek or Giant frame, where they do...

If it were a Trek or Giant frame, where they do fatigue testing, etc .... I dunno about the little carbon shops in China that make these things. Can you trust them..
Forum: Electric Bikes
12-06-23, 07:31 PM
Replies: 76
Views: 4,067
Posted By Doc_Wui

Those jump starters are not that big, They...

Those jump starters are not that big, They contain pouch cells. I bought three of them from Walmart on clearance for around $25 each in 2015. Ran them in series to power my 36V bike. Cheap power...
Forum: Electric Bikes
12-04-23, 10:59 PM
Replies: 76
Views: 4,067
Posted By Doc_Wui

All of those Hailongs that have a space in the...

All of those Hailongs that have a space in the cradle to hold a controller only have two locking tabs to lock the battery down. They shouldn't be used upside down with half the weight of the battery...
Forum: Electric Bikes
12-03-23, 11:01 PM
Replies: 4
Views: 534
Posted By Doc_Wui

I like this one at first glance. Mid drive. Easy...

I like this one at first glance. Mid drive. Easy to replace rack battery.
.
https://sport.woot.com/offers/delta-cycle-ebike-mdrive-7-speed-6?ref=w_cnt_wp_10_13
Forum: Electric Bikes
12-01-23, 05:41 PM
Replies: 76
Views: 4,067
Posted By Doc_Wui

Many of the chinese import ebikes do use commonly...

Many of the chinese import ebikes do use commonly available batteries, even if most have moved to designs that integrate batteries in the frame.

In the DIY world, you're going to be choosing...
Forum: Electric Bikes
11-30-23, 10:57 AM
Replies: 76
Views: 4,067
Posted By Doc_Wui

With regard to the Euro directives, I would...

With regard to the Euro directives, I would assume the same ...LMT includes electric only and electric/human power.

I believe the bigger batteries will eventually have ports like cars do today...
Forum: Electric Bikes
11-27-23, 12:58 PM
Replies: 9
Views: 996
Posted By Doc_Wui

Well chosen! You can't lose with the lighter...

Well chosen! You can't lose with the lighter weight, plus the better fitting frame.
Forum: Electric Bikes
11-18-23, 01:11 AM
Replies: 76
Views: 4,067
Posted By Doc_Wui

I hope the NYC law requiring UL listed batteries...

I hope the NYC law requiring UL listed batteries on new ebikes/scooters helps. I believe that a lot of the NYC battery fires come from people who are using batteries that have been rebuilt with...
Forum: Electric Bikes
11-18-23, 12:16 AM
Replies: 23
Views: 1,574
Posted By Doc_Wui

Yes they should. Usually 210 rpm for 26" or...

Yes they should. Usually 210 rpm for 26" or larger tire diameter and 280 rpm for 20" tire diameter, With the above aliexpress vendor, they show the two rpm values for their motors. I figure they...
Forum: Electric Bikes
11-17-23, 11:20 PM
Replies: 54
Views: 3,209
Posted By Doc_Wui

It's a good idea just in case both the battery...

It's a good idea just in case both the battery and charger fail at the same time, which is unlikely, but sure seems to be common in New York City.

I try to never leave my batteries charge...
Forum: Electric Bikes
11-15-23, 10:20 PM
Replies: 8
Views: 519
Posted By Doc_Wui

Back before we had internet, I was put in charge...

Back before we had internet, I was put in charge of UL safety approvals for our company's product. Good thing I had experts in my group because I knew nothing, but I developed a great respect for the...
Forum: Electric Bikes
11-10-23, 01:23 PM
Replies: 23
Views: 1,574
Posted By Doc_Wui

He did state Origami Bull. ...

He did state Origami Bull.
https://www.origamibicycles.com/shop/p/bull

Folders are tough to find a location for the battery and controller that keeps them small/foldable. Those store bought...
Forum: General Cycling Discussion
11-06-23, 07:25 PM
Replies: 169
Views: 7,739
Posted By Doc_Wui

This time of year, it's wooly bear caterpillars,...

This time of year, it's wooly bear caterpillars, Run over one, and you make it rain, according to Pogo,
Forum: Electric Bikes
11-05-23, 11:01 PM
Replies: 23
Views: 1,574
Posted By Doc_Wui

I also see the 20" amazon motor kits from China...

I also see the 20" amazon motor kits from China with controller/display for under $275, as low as $250 depending on display, You get the IT4 cable harness and waterproof connectors all around, plus a...
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