Search found 432 matches

by ferret
May 16 2019 11:25am
Forum: E-Bike Non-hub Motor Drives
Topic: Left side freewheeling cog with rotor
Replies: 18
Views: 1364

Re: Left side freewheeling cog with rotor

I converted a 135mm hub to a 150mm hub. A little bonus is that this setup places the rim exactly between the hub flanges, which makes a stronger symmetric wheel. On the left side, a 56t narrow wide chainring is mounted on a freewheel behind a 203mm brake rotor. The planned build is a mid drive setup...
by ferret
May 16 2019 7:39am
Forum: E-Bike Non-hub Motor Drives
Topic: Left side freewheeling cog with rotor
Replies: 18
Views: 1364

Re: Left side freewheeling cog with rotor

Thanks.

It's 150mm.

Avner.
by ferret
May 08 2019 12:36pm
Forum: E-Bike Non-hub Motor Drives
Topic: Index of all left side chain + brake designs ?
Replies: 16
Views: 956

Re: Index of all left side chain + brake designs ?

If the frame you are considering doesn't fit a 203mm rotor, it probably won't allow this kind of setup. Very nice build for the intended use, but that bike has a skinny frame, no rear suspension, and narrow tires, which make it easier to convert but unsuitable for the riding I do. Not to mention the...
by ferret
May 08 2019 10:17am
Forum: E-Bike Non-hub Motor Drives
Topic: Index of all left side chain + brake designs ?
Replies: 16
Views: 956

Re: Index of all left side chain + brake designs ?

The conclusion that I came to is that to fit a left side chain + brake design, a rear axle axle width (chainstay spacing) of a least 150mm is required. That will mostly limit the frame choice to Downhill and Fatbike frames. It is possible to fit the brake and sprocket in a narrower rear end, but the...
by ferret
May 08 2019 8:35am
Forum: E-Bike Non-hub Motor Drives
Topic: Index of all left side chain + brake designs ?
Replies: 16
Views: 956

Re: Index of all left side chain + brake designs ?

I've done it with custom "top hat" style adapter and caliper adatper:
https://endless-sphere.com/forums/viewt ... 28&t=82678

Avner.
by ferret
May 03 2019 12:27pm
Forum: E-Bike General Discussion
Topic: Pros/Cons of a 44t/22t vs 32t/16t on a mid drive?
Replies: 5
Views: 404

Re: Pros/Cons of a 44t/22t vs 32t/16t on a mid drive?

Both 44t/22t and 32t/16t give you the same 2:1 gear ratio.

From the issues you mentioned only the teeth engagement and maybe the Wear/Maintenance will be different.

Avner.
by ferret
Apr 19 2019 12:34pm
Forum: E-Bike Technical
Topic: Cycle Analyst V3 Power vs Torque mode
Replies: 4
Views: 387

Re: Cycle Analyst V3 Power vs Torque mode

I guess power mode is more similar to ICE than torque mode because it is less effected by battery voltage drop, but the difference is usually negligible. CA limits the amount of current generated by the system by lowering the throttle signal sent into the controller then the current is about to exce...
by ferret
Apr 16 2019 3:59am
Forum: E-Bike Technical
Topic: Cycle Analyst V3 Power vs Torque mode
Replies: 4
Views: 387

Re: Cycle Analyst V3 Power vs Torque mode

Hi. You can use torque throttle mode with any controller as long as you use an external shunt. https://www.ebikes.ca/shop/electric-bicycle-parts/ca-accessories/shunts.html If you can't use torque mode then power mode won't work either, because power (Watt) is calculated by multiplying Amps (which ar...
by ferret
Apr 15 2019 9:36am
Forum: E-Bike Technical
Topic: Adjustable controller?
Replies: 6
Views: 533

Re: Adjustable controller?

If the controller has a DP CA plug, a DP CA can limit amps. Can't if its a stand alone. Sorry, that is incorrect. All CAs can limit Amps. https://www.ebikes.ca/shop/electric-bicycle-parts/cycle-analysts.html The DP models use the controllers internal shunt to do it, the SA models use a supplied ext...
by ferret
Apr 12 2019 10:30am
Forum: E-Bike Technical
Topic: Adjustable controller?
Replies: 6
Views: 533

Re: Adjustable controller?

CA will do that.

Keep in mind that the Amp rating is the maximum that the controller can handle without frying.
If you motor for example pulls 90 Amps max it doesn't matter if the controller can survive 120A, the system will not pull more than 90A.

Avner.
by ferret
Jan 22 2019 5:52am
Forum: E-Bike General Discussion
Topic: Tubeless Rim's What Brands ? Prices ?
Replies: 7
Views: 513

Re: Tubeless Rim's What Brands ? Prices ?

I have been riding tubless off road for a few years now. Both DIY conversions and off the shelf stuff in 26" and 27.5". After switching, flats went from a weekly occurrence to maybe once a year. The only time I burped a little air was after hitting a tree stump with such force that would have probab...
by ferret
Jan 07 2019 10:11am
Forum: E-Bike Non-hub Motor Drives
Topic: DH frames for freeriding
Replies: 52
Views: 4385

Re: DH frames for freeriding

Grant, a 200mm travel DH bike is a good choice, the slack head angle good for riding fast off road. In most cases, freeriders use DH bikes. That said, any (decent quality) full suspension bike will be a major step up compared to a HT. you should take into account that generally the more travel a bik...
by ferret
Aug 31 2018 3:15pm
Forum: E-Bike General Discussion
Topic: Mountain bike frame geometry tending to get longer and lonnnger
Replies: 18
Views: 1107

Re: Mountain bike frame geometry tending to get longer and lonnnger

Chalo wrote:
Aug 31 2018 12:47pm
Since MTB riding is usually only fooling around of one kind or another, even what kind of riding that is, is an expression of fashion.
:shock:
:roll:
:lol:
by ferret
Aug 29 2018 3:02am
Forum: E-Bike Technical
Topic: Kv * turns = constant?
Replies: 10
Views: 876

Re: Kv * turns = constant?

Short answer - no. When you double the the KV you also get half the KT and get half of the torque for the same current. However, when doubling the reduction ratio you will get only half the heat.

Long answer - read this :twisted: :
viewtopic.php?f=2&t=64907

Avner.
by ferret
Aug 13 2018 5:58am
Forum: E-Bike Technical
Topic: Possible to increase charger current.
Replies: 5
Views: 535

Re: Possible to increase charger current.

The chargers markings seem to suggest it is rated at 360 Watt. If that is the case, then it won't charge at 8A if the pack voltage is higher than 45V.

Avner.
by ferret
Jul 31 2018 10:09am
Forum: E-Bike Technical
Topic: Lower no-load speed with sine wave controller?
Replies: 11
Views: 735

Re: Lower no-load speed with sine wave controller?

Thanks a lot for the reply! So the Sabvoton probably uses a simpler technique. Are there any controllers that use a more sophisticated technique? (Adaptto?) Which of them use space vector modulation? Instead of replacing the controller, why not just just enable the field weakening and set it to get...
by ferret
Jul 30 2018 5:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: Nylon Motor Mounts
Replies: 5
Views: 459

Re: Nylon Motor Mounts

I guess thick plastic could work, but why not use Aluminium? Also, why mount it in a tubular structure instead of bolting the original mounting points to brackets on the swing arm? Maybe if you posted some picture I could get a batter idea of what you are aiming for and try to give more focused advi...
by ferret
Jul 30 2018 5:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: Castle LINK programming kit - is it necessary/worthwhile with CA V3?
Replies: 11
Views: 902

Re: Castle LINK programming kit - is it necessary/worthwhile with CA V3?

I'm running a Phaserunner with a 3215 (sensored).
Works good, but less powerful than the HV160 I used before.

Dave, the ASI guys are useless, Grin Cycles guys rock.

To get it to work without errors I used the following setting:
Banwidth.PNG
Avner.
by ferret
Jul 30 2018 11:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Nylon Motor Mounts
Replies: 5
Views: 459

Re: Nylon Motor Mounts

Ham,
Nylon isn't very strong and is a poor heat conductor.
Mounting the motor in a tubular closed structure with heat insulating mounts sounds like a recipe for heat soak.
Doesn't make much sense to me...

Avner.
by ferret
Jul 30 2018 4:30am
Forum: E-Bike Technical
Topic: BMX chains
Replies: 5
Views: 474

Re: BMX chains

Only 10 (or more) speed chains will fit 10 speed cassettes and derailleurs. BMX chains are too wide.

Avner.
by ferret
Jul 24 2018 5:06am
Forum: E-Bike Non-hub Motor Drives
Topic: Name/Type of sprocket for this mid motor drive?
Replies: 8
Views: 758

Re: Name/Type of sprocket for this mid motor drive?

Maybe turn the old sprocket into an adaptor for a standard BCD sprocket by drilling chainring bolt holes and cutting off the the toothed rim?

Avner.
by ferret
Jul 07 2018 9:01am
Forum: E-Bike Technical
Topic: Halo wheels
Replies: 2
Views: 327

Re: -- Cuts in Halo wheels, what the heck is this? --

Looks normal. All aluminum rims are made by taking a straight profiled extrusion and bending it into a circle. The "cuts" are the place where the circle is joined. The joint is usually strengthened with an insert and some times welded. In most cases the valve hole is located opposite to the joint of...