Grin does it again. Regen 36v hub motor 28mph
- Thread starter tomjasz
- Start date
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
As someone already explained the controller does not convert one voltage to another. Rather you choose the voltage to be used and the controller has the ability to power the motor at the chosen battery voltage.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Many users report running MAC motors at higher power and getting several thousand miles of trouble free riding. Metal gears are CRAZY loud. Occasionally you'll find a user that has used ONE metal gear and claims improved gear life. But again, MAC and eZee motors are well known for reliability and long service life. Charging out a clutch/gear assembly is easy peasy.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Using the Grin tools will reveal the heat failure point. See the motor simulator.
https://www.ebikes.ca/tools/simulator.html
Ebiker01
Well-Known Member
B/c she’s probably 50 or 75lb -100lb lighter then you are ??
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Efficiency.
There is an OEM brand with the MAC. Check out the Oyama Bright (it's sold out actually): https://www.ebikejoy.com/collection...t-e9d-v2-electric-bike?variant=15432870133850
Clearly a Stromer clone with likely much better performance for the US market. I know PIM is working on an an OEM model similar to this to be out early next year. It will be worth waiting for if you want a fast urban mobility ebike (likely 52V, ASI controller tech, Class 1 std 20mph with unlocked maybe up to 35mph, carbon frame or at least some carbon components like fork, bars, stem, and seat post). The geometry will be base significantly on the Polaris ebike frame that was never really a good offroad ebike but a great geometry for urban riding.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Different motors. Different uses. The newer Bafang G310 and similar are GREAT. Mac has been around a long time based on the top shelf BMC. But no MAC is sized like the new Bafangs. I think eZee is a bit above MAC but likely eZee wouldn't or wasn't interested in the development of a new concept with Grin.
Looks like you answered your own question.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
No. Not if you want the features Bafang offers. eZee is about the size of a MAC. I'm not sure what you're on about there.
Methinks you overthink this stuff. I apologize for my tone.
Nothing is that cut and dried.
Best for YOU? Best for me can be quite different.
I'd take ANY of the three mentioned on a properly built bike using each motors strong points and integrating them.
Reading about the various motors and actually building and/or riding with them is a very different perspective. I'm no expert, but I've built using each one. Just for the experience. That probably makes me even less helpful given I'm a fan of so many different builds. I have a reseller account so I've been able to putz away at many different builds with the small commissions I earn..
AHicks
Well-Known Member
- Region
- USA
- City
- Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
New 12t arrived today. Can't believe stuff can get here from China that quickly. Likely won't be able to get near it for a couple of weeks due to other stuff going on, but we'll know soon if it can hang in there at 1000+ watts. That would be pretty neat. Should teach me a bunch. -Al
Feliz
Well-Known Member
Programmable controllers and improved battery technology are the future. I don't care how fast I go, I've never had a bike I can exceed ( I've had bikes that will but I won't ) 20 mph. Wreckless idiots riding at ridiculous speeds have ruined it for eBikes on our trails/paths around here.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Sadly the Lunatics have done a lot to bring on silly rules. We’re I a useless asshat with no respect and 14 years old... I feel your pain. Thankfully we’re lucky enough to have adults as our primary customers. It just amazed me to see asshats do 35mph capable kits on Walmart $200 junkers. Bikes that 99% of bike shops won’t even look at. Go figure. I be learned, having built fast bikes, they are an accident waiting to happen. Car drivers see bicycle and expect sub 15mph bikes coming at them. At 35 I think we invite a mishap. But then what do we know... sometimes it’s good to be old! Thanks Feliz! All the best!
AHicks
Well-Known Member
- Region
- USA
- City
- Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
I couldn't agree more. I'm a big fan of programmable controllers here. The very reasonably price KT based controllers (and displays, e.g. LCD3) available from a lot of sources, are making new friends every day with those installing Bolton's kits that use them for instance.
You can't deny though the potential for new ideas when it comes to motors (like the one in our topic for instance) and transmissions either. These can, and will revolutionize when new ideas come along. The potential for this new MAC to be able to use regen for the majority of it's braking sounds pretty neat!
Does anyone realize that someone averaged nearly 35mph for an hour on a bike without assist and yet people on the EBR forum keep making claims that an ebike with assist higher than 20mph is just leading to wreckless riders ruining it for everyone.
WRECKLESS riding can be but is certainly not isolated to higher than 20mph speeds. I've ridden both ebikes and traditional bikes in bikes lanes down hills at speeds over 20 probably since I was 12 years old. I understand that to some 20mph is just scary fast and they were likely the same people wanting to keep our highway speeds limited to 55mph.
I'm not convinced the promotion of Class 1 speeds being limited to 20mph is about safety...I think it's about giving the mid-drive manufacturers and easier path to economies of scale so they can sell the same under-powered ebikes they sell in Europe in the US. I think Europe is realizing that ebikes will not reach their full potential unless they allow more power for say cargo ebikes and even allow faster assist speeds for urban mobility when not on crowded or shared sidewalks and bike paths.
AHicks
Well-Known Member
- Region
- USA
- City
- Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
Geez, will you guys get over it please? There are those e-bikers who are commuters, and there are those who are not, that ride for pleasure only, and very often that riding is done in close proximity to those on foot. To a commuter, 20 mph is no big deal. Everybody here gets that. On the other hand, to somebody riding on a bike trail, 20 mph might be a very big deal.
Taking comments made in proper context isn't rocket science. Give it a try!
And let's try to keep this about the new Grin/Mac.
Taking comments made in proper context isn't rocket science. Give it a try!
And let's try to keep this about the new Grin/Mac.
tomjasz
Well-Known Member
- Region
- USA
- City
- Minnesnowta
Needed to go to the specs this morning and confirmed, eZee is about the size of an 11/34 cassette. Actually a bit smaller.
Feliz
Well-Known Member
Tom - I hope you don't mind me posting this on your thread, I thought this was an interesting article for those of us who are engineering oriented.
https://wattsupwiththat.com/2018/04/25/a-positive-perspective-on-electric-vehicles/
https://wattsupwiththat.com/2018/04/25/a-positive-perspective-on-electric-vehicles/
Similar threads
