Feliz
Well-Known Member
The Bafang Ultra is user-programmable.
Correct, as long as you have the cable.
The Bafang Ultra is user-programmable.
The EX1 looks like an amazing gear system. Have you had a chance to ride one yet?
Ravi
How's the project coming along ?
Thanks for the reply.Thanks Mark.
Right now, friend is designing a 3D-printed box that will go in the front triangle and it looks elegant (like the AUDI ebike battery), houses a large battery 52V, 25Ah for a whopping 1250Whr capacity. One could always use the stock 870whr (not 850!) battery for weight and cost savings. The stock battery can be switched on the go, comes with Cycle satiator charger as standard.
The first batch should be out in 2-3 weeks and I will post the pics here.
E-14 is not developed for non-Bosch motors. Also, E-14 has some kinks that need to be ironed out before it can be paired with the reputation that these hubs have garnered over the years.
Manual shifter has been refined over the last 15 years and it works pretty good and any service/maintenance can be done by a reasonably proficient mechanic. Doesn't need any extra electronics for diagnostics. One less headache from service perspective.
With a 750W motor, 10-12 gears are a complete overkill. Even Rohloff is a overkill (originally designed for pedal bikes).
So, we finally decided to spec SRAM EX1 E-bike specific cassette. it's only 8 speeds but wide range of gears carved out of a single block of metal and it's really strong and lasts significantly longer than regular cassettes.
Thanks for the reply.
I have mixed feelings about the Audi-style battery; I get about 50% more Watt hours but in a bulkier battery design. With the traditional design, I get 100% more Watt hours for each spare battery I carry, plus quicker recharging time if I bring extra rechargers. Also, I can save weight on shorter rides by carrying fewer batteries.
Are you going to offer the bike with only the SRAM EX1 and not with a Rohloff option?
Ive got the EX-1 on my Ultra-powered emtb. It's a stout cassette and the only one that can handle the power of an unrestricted Ultra - otherwise the motor chews up and spits out lesser cassettes - bent my OEM cassette on the first ride when aggressively shifting. However, for a road bike with a 750w-limited motor, it's probably overkill.The EX1 looks like an amazing gear system. Have you had a chance to ride one yet?
I would suggest a general use commuter bike be a step thru design but you might just offer both frame styles. Also Ti seems too $$ for a commuter bike.
Very valid point. The next iteration will have many new features, including some of the things you mentioned.
Right now, we wanted to design a bike that we would like to ride ourselves. It's really in a class of its own.
SECA 1800 lumen front light,
Satiator charger,
KinectPost (body float seat),
Brooks saddle,
ABUS Bordo alarm lock,
Magura MT5-e brakes,
Custom EM3ev 880whr battery, (1250whr upgrade) [open source] , so you're not tied to any proprietary parts.
Rohloff + gates carbon drive
True 28mph motor, and
Titanium frame.
All for $5999.
I can't find another bike that boasts these features and current models are designed for people who have ridden ebikes but want the very best.
I'll share the photos very shortly.
Very valid point. The next iteration will have many new features, including some of the things you mentioned.
Right now, we wanted to design a bike that we would like to ride ourselves. It's really in a class of its own.
SECA 1800 lumen front light,
Satiator charger,
KinectPost (body float seat),
Brooks saddle,
ABUS Bordo alarm lock,
Magura MT5-e brakes,
Custom EM3ev 880whr battery, (1250whr upgrade) [open source] , so you're not tied to any proprietary parts.
Rohloff + gates carbon drive
True 28mph motor, and
Titanium frame.
All for $5999.
I can't find another bike that boasts these features and current models are designed for people who have ridden ebikes but want the very best.
I'll share the photos very shortly.
Very valid point. The next iteration will have many new features, including some of the things you mentioned.
Right now, we wanted to design a bike that we would like to ride ourselves. It's really in a class of its own.
SECA 1800 lumen front light,
Satiator charger,
KinectPost (body float seat),
Brooks saddle,
ABUS Bordo alarm lock,
Magura MT5-e brakes,
Custom EM3ev 880whr battery, (1250whr upgrade) [open source] , so you're not tied to any proprietary parts.
Rohloff + gates carbon drive
True 28mph motor, and
Titanium frame.
All for $5999.
I can't find another bike that boasts these features and current models are designed for people who have ridden ebikes but want the very best.
I'll share the photos very shortly.
Very valid point. The next iteration will have many new features, including some of the things you mentioned.
Right now, we wanted to design a bike that we would like to ride ourselves. It's really in a class of its own.
SECA 1800 lumen front light,
Satiator charger,
KinectPost (body float seat),
Brooks saddle,
ABUS Bordo alarm lock,
Magura MT5-e brakes,
Custom EM3ev 880whr battery, (1250whr upgrade) [open source] , so you're not tied to any proprietary parts.
Rohloff + gates carbon drive
True 28mph motor, and
Titanium frame.
All for $5999.
I can't find another bike that boasts these features and current models are designed for people who have ridden ebikes but want the very best.
I'll share the photos very shortly.
Ravi,
Is this bike available for pre-order now?
Thanks
Reading down that list, I thought cool, nice, then I get to boost hub. I thought wow, most riders I know don't even know what a boost hub is. I was just explaining to a friend a couple months ago what it meant for him that he had boost hubs on his new bike.Rohloff hub = check
gates drive = check
BodyFloat = check
1800 lumen light = check
Throttle = check
true 28mph = check
Brooks saddle = check
Titanium frame = check
electronic horn = check
Boost hub = check
100lbs capability rear rack = check
880 whr battery = check
Satiator charger = check
ABUS alarm lock = check
Reading down that list, I thought cool, nice, then I get to boost hub. I thought wow, most riders I know don't even know what a boost hub is. I was just explaining to a friend a couple months ago what it meant for him that he had boost hubs on his new bike.
I guess it's a techy thing most just read past, but it's things like that level of detail that stand out to me. Not as big a wow factor as other things on that list, nevertheless wow!
Nice job Ravi!
A used Ti frame is 7-800$ on ebay then add all the nice parts...under 3grand.
It looks fughly with the battery pack. If it were to be integrated
Yes i know about that fancy hub, the downtube batteries can have their cells replaced at anytime in the future. Same with the other design. The cells will only get better for same dimensions or smaller, meaning that they will fit in the battery case.Have you heard of a hub called "Rohloff" ??
if you have not , I suggest you read this: https://www.electricbike.com/a-rohloff-on-an-electric-bike/
The hub itself costs $1350. Then add spokes, sprocket, lacing, wheel etc.
5 or 6 years ago, nobody used 52V batteries. it was all 36V and even now many bikes use 48V batteries, not 52V.
Integrated packs would be nicer but come with a caveat.
In 4-5 years, when the batteries need replacement, the replacement has to fit that specific design. Many fancy packs that we see now will incur higher replacement cost because the economies of scale is not in favor.
The design was built around the idea that battery packs should not locked down and replacements should not be a problem.
It is one of the reasons, companies like Bosch and Yamaha make their batteries backwards compatible and still use the powerpack design (mounted on the downtube).
The goal was to build tough as nails bike that would be extremely capable whether it is commuting or light touring.
downtube batteries can have their cells replaced at anytime in the future. Same with the other design.