LightningRods mid drive kit

Upgrading to the Big Block should be pretty straightforward. Despite being more than twice as powerful the Big Block is actually slightly smaller and lighter than the Cyclone 3kW. Half of the Cyclone motor is planetary gearbox, which is only useful for syncing human pedaling cadence with the motor rpm. Once the power level gets above 2kW all of that reduction starts to break driveline parts. We never want to have to overdrive the final drive to get back rpm lost in too much motor reduction. At 250-500 watts you can get away with it because the bicycle driveline was designed to deal with that power level. 3000 watts with it's torque multiplied 15x or more is way too much stress. I noticed that you installed small chainrings on your Cyclone to reduce the reduction/overdrive issue. That really helps.
Let me know if I can answer any questions.
 
I'd just be guessing. I've set people up with Big Block RHD drives going to a DT Swiss 350 in the past and didn't hear back that it failed right away. It is going to be a much larger than designed for strain on the pawls and ratchet ring. If you set the single speed sprocket up correctly the external free hub splines will be fine.

I'd run it and see how it holds up. If it dies you could replace it with a solid mount hub and then have regen braking. Or for a stronger freewheel option go with a thread on freewheel hub and run a White Industries HD or UHD flanged freewheel.
 
Any solid mount hubs around that would work ? I would prefer to have regen
 
Good decision. Regen is way more useful than freewheeling. With progressive throttle controlled regen you can also coast. With no free hub clicking. Based on your priorities you're going to love the Big Block.

Woody's Wheel Works has a beautiful billet hub for the SurRon that I used on a Qulbix build. The customer supplied it so I'm not sure how nose bleed expensive it is. A SurRon hub would no doubt also work and they're cheap.

SurRonHub-Top.jpg
 
Ok so the SurRon hub is 12mm thru axle and would just need some spacers right ? I'm guessing i would need a 219 sprocket for the hub, do you have any ?
 
I’m not sure what the stock SurRon has. We had custom axles.
I have adapter plates from SurRon bolt pattern to standard 219 kart pattern. So you have your pick from 64T to 93T.
009DFFBC-9618-443A-A396-57FD111D1787.jpeg
 
Do you also have the shimano style freehub adapter for Kart pattern ? And the new BB belt drive kit you posted the other day does it have a 219 driver sprocket on it ?
 
MSF said:
Do you also have the shimano style freehub adapter for Kart pattern ? And the new BB belt drive kit you posted the other day does it have a 219 driver sprocket on it ?
Click to expand...

Yes I do and yes it does. 😊
 
Any pics of that adapter ? Thanks for answering all my questions. I have had a lot

Edit

Nevermind i found it on FB. Does that adapter have the same bolt pattern as the disc brake ?
 
Sorry, I took the evening off. Here are the pics:
Shimano1.jpeg
Shimano2jpeg.jpeg
Shimano3.jpeg
Yes the six bolt pattern is the same as a standard disc brake rotor. The Fouriers part is available all over the internet and comes with positioning spacers.
 
I can't speak for anyone else, but...I want Lightning Rods to stay in business. If he gave away all the blueprints for laser-cutting the plates and published all of his suppliers, there would be somebody who would claim to make a kit as good as him but cost less (Cyclone and GNG have already done that). The problem is that...they won't be as good as him.

I don't know when LR will retire, but until then, we have a handful of years where customers can actually get a high-quality well-designed product. For years I have found myself surrounded with advertisements blasted in my face everywhere I turn, claiming outrageous quality and performance, only to buy it and find a barely adequate product whose only benefit was a slightly lower price, which was the result of low-cost labor and corporate apathy.

LR will be gone soon enough, don't drive him away just yet.
 
spinningmagnets said:
LR will be gone soon enough, don't drive him away just yet.
Click to expand...
True enough Spinningmagnets. One thing thieves are good at- rationalizing why they are more entitled to someone else’s property than the owner.
 
Was laying in bed last night and had an idea. What do we see here ?
 

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MSF said:
Was laying in bed last night and had an idea. What do we see here ?
Click to expand...
It looks to me as if someone has used a single speed adapter to install a brake rotor on the freehub. Wouldn’t the freehub just freewheel when the rear brake was applied? The rotor would stop. The bike not so much.
 
That is my bike and the brake works as it should going forward just not backwards. Don't tell me i am the first one to think of this :shock:
 
I am actually pretty thrilled about this, now i don't have to swap over to SurRon hub to have regen
 
MSF said:
That is my bike and the brake works as it should going forward just not backwards. Don't tell me i am the first one to think of this :shock:
Click to expand...

No, the idea occurred to me as soon as I made the six bolt pattern for the single speed sprocket the same as the brake rotor. Sadly it doesn’t work. What the freewheel/freehub does is allow the wheel to rotate forward when the rider stops pedaling. The rotor behaves the same as the sprocket. It stops and the wheel freewheels.
 
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