Differences between Swizzbee C25 and C50?

Rigi

Finding my (electric) wheels
Aug 30, 2025
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Hello,

I'm new here and not very fluent in English. I hope you understand.

Can someone describe in detail the differences between the Swizzbee 50C and 25C? I'm well-informed about the mechanics, but not the electrical stuff. Is the electronics in the battery case identical? If not, what exactly is different? I mean the electronics in the 24-volt model.

Thank you, hopefully see you soon!
 

Nealh

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Aug 7, 2014
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25C is the legal EN15194 model and top speed is limited to 25km/h.
50c is the S pedelec version with no speed limit, it can achieve 45 - 50km/h.
Both have 0.25kw drive motor.

Battery case electronics will differ slightly as one is speed limited.
25c & 50c use the same OEM battery .
 
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Nealh

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The Swizzbee 50C is now considered a rare and obsolete piece of electric bike history, with limited repair options due to its unique components.
The mounted mid motor is a Heinzman BLDC , the motor is was a one off experimental design.

The weak link in the bike is the Sram dual drive .
 
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Nealh

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thelarkbox

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What are you looking for in an ebike? Police have started to take an interest in bikes that dont conform to the regs in recent months.

Even so if you can provide details of your expectations and requirements ie range and the sort of local landscape (hills etc) your dealing with. We can point you at bikes and options that meet your needs without breaking the bank or the regs.

Buying 2nd use branded ebikes can be a minefield, Systems and features designed to hamper diy repair/maintenance from simple but exclusive plug/socket connectors, to completely closed and locked down firmware systems designed to self brick when 'tampering' is detected, are very common and often show stopping. Replacing built in components with generic bolt on replacements will often ruin the appeal of many elegant/sleek bike designs, leaving voids in the frame etc..

If your considering a 2nd use purchase post specific details of the bike inc any pics of the display/interface/controls and any battery/controller labels and connections easily accessible.
Then those with vast experience can asses and give you a thumbs up or down accordingly..
 
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Nealh

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As one can see from my profile pic , I own a 50c .
I have two 50c's one in working order and one a bit poorly and worn out.
I converted mine (from Nicad) to run on Lion and use two battery packs in parallel, one using lg HE2 and the other panasonic PF.

A working Swizzbee is a very rare bike today.
 
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Rigi

Finding my (electric) wheels
Aug 30, 2025
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Hello,

Thanks for your answers!

I have the Swizzbee 50c. I don't think it's outdated. It's the best e-bike I've ridden so far. I know a lot!

I'm interested in the components of both models in detail. When I wrote this post, I was about to buy a Swizzbee 25c because of the spare parts. I bought it! But I noticed that the cadence sensor is different. Is that possible? Or is it broken? If I install the battery case from the C50, the motor runs at an unusually higher speed.

I actually only want spare parts for emergencies.

I met someone who can program the Swizzbee controller. If, for example, something was broken, like a chip.

I installed an S7 lithium-ion battery. I love the bike!
 

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Rigi

Finding my (electric) wheels
Aug 30, 2025
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0
Do you have an original model with a lithium battery? Then you also have an EVO hub in the rear wheel?
 

Nealh

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My first one had the LG lipo battery, I had a new 7s Lion made for it.
My second one had NiCad battery, I made two new Lion packs for added range.
Both of my bikes have the Sram hub drive.

 
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Rigi

Finding my (electric) wheels
Aug 30, 2025
5
0
What are you looking for in an ebike? Police have started to take an interest in bikes that dont conform to the regs in recent months.

Even so if you can provide details of your expectations and requirements ie range and the sort of local landscape (hills etc) your dealing with. We can point you at bikes and options that meet your needs without breaking the bank or the regs.

Buying 2nd use branded ebikes can be a minefield, Systems and features designed to hamper diy repair/maintenance from simple but exclusive plug/socket connectors, to completely closed and locked down firmware systems designed to self brick when 'tampering' is detected, are very common and often show stopping. Replacing built in components with generic bolt on replacements will often ruin the appeal of many elegant/sleek bike designs, leaving voids in the frame etc..

If your considering a 2nd use purchase post specific details of the bike inc any pics of the display/interface/controls and any battery/controller labels and connections easily accessible.
Then those with vast experience can asses and give you a thumbs up or down accordingly..
I'm from Germany. I haven't mentioned that yet. I'm sorry. Are there spare parts for Swizzbee bikes in the UK? It's not very easy in Germany either. But it seems easier.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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Swizzbee numbers in the UK will be very limited , we know of three:D.
There maybe a couple more somewhere, the main dealer for them I think was in London.