amberwolf wrote: ↑
Apr 08, 2018 9:51 pm
It's a nice idea, but:
If you make a new disc mount, then no one can use the standard ISO discs on their existing brakes.
It'd probably end up like my Fusin geared hub that has some wierd custom rotor design, that can't accept an ISO rotor, and can only be used with their own--but they're out of business, so no rotors are available for anyone that has one of these motors.
Well, the real answer to this thread is bicycle frames built for the motors. If standardized frames for 26" tires were built with dropouts designed for 10 x 14mm axles, and in a way to withstand regen or other breaking then every other standard 26" bike part could fit.
The could be built in 18,19,20 and 21 inch heights with big triangles. Only one color would be need, say white. Basic but suited for a hub motor.
Probably end up with different companies each making their own new rotor style, so you can only buy their rotors, and then when they change it again and stop making the old style you're screwed and have to buy a whole new motor just to use the new rotors. Even if they all agree to make them to whatever the new "standard" would be, you're still stuck with whatever those rotors are made from, and whatever design they choose, and sizes they have available, etc.
Yes it is true, we would be stuck with limited options, but repeat sales is what keeps a business in business. However if a proprietary rotor was made for non standard side cover then the rotor could be purchased and not a whole motor. It would be something one would have to accept for the cost of having a really solid torque arm for the motor.
The exception would be if someone started making adapters to allow use of the various floating rotors that are available for the ISO rotor standards. (but you still end up with the other potential issues).
Like loose screws maybe.
That's why I said it'd only work (practically) if you don't have a rear disc mount, or you don't have a rear pedal chaindrive mount. (like scooter motors and up). And on these larger motors for scooters/mopeds/motorcycles, the brake rotor ID is larger anyway, so you could probably still have the rotor mount on there outside of the bearing.
Less stuff in the way surly makes adaption easier.
As far as the "axle channel" goes, the whole point of the larger bearing is to have no axle channel. If you're still going to have one, I'd rather leave things alone completely and stay with what already "works", rather than changing to some new ID size standard for brake rotors and/or freewheel/cassette bodies.
I don't understand the "no axle channel" part . Gotta get the wires in there somehow. At some point, all hub motors have an axle channel. Usually it is after the bearings behind the side covers. As for leaving everything alone, that has brought us to the torque arm issue in the first place.
Otherwise you've added complexity and manufacturing cost for the axle, the covers, the brake system, etc., without really fixing the problems that having an axle channel create in the first place (weaker axle, insufficient space for wiring, etc.) and without giving the easily-expanded options of the inner ring-spacer that can be drilled out (or replaced with one with more/larger holes) for various wiring / etc options.
Maybe not. Once all the tooling is done, the manufacturing time and materials would be about the same. What would be limited would be the choice of manufactures. If we need it and only one company sells it then we would have to buy from them. Unless the Chinese see a profit in it.
As for a weaker axle, I have to disagree. A larger bearing with a larger ID give room for a larger OD on the axle. ie thicker axle. A channel for 10 awg wires would not weaken it at all. At least for most hub motors.
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Current build: Liahona w/ cheap front suspension and suspension seat post. Yescomusa 36v 800w generic front hub motor. 15ah Headway triangle mounted pack. Tronsung 30 amp,
Previous Build:1992 Trek Antelope 800 - Bone Crusher (no suspension) - Yescomusa 800 watt 36 volt front wheel kit. Don't do it! Get suspension!!!