My 1985 Sinclair C5.

SX550

Well-Known Member
Exactly a year ago i stumbled upon a for sale ad for a weird electric tricycle.
I fell in love with it the moment i saw it and bought it for €250.
In my opinion a classic design icon like the Delorean.

This was Sir Clive Sinclair's (inventor of the sinclair computers) idea of the electric vehicle revolution. It truly was the first ever idea for a mass produced cheap electric vehicle.
Sadly it was an awful flop and only a few thousand were sold.
Too ahead for its time and the british weather and traffic just does not suit it.
Where i live in belgium or holland with its perfect flat cycle roads its awesome to get around.

Now since the inventor passed away these go around €1000 in running condition, nearly new-new €2000-€4000.

There is now a very active community restoring them and its absolutely lovely with people designing and 3D printing replacement parts

Technically its very dated, 250w brushed 12V motor with a lead acid battery, controlled by a relay.
U need to pedal up to speed them press a button for the motor and i can get up to 15mph in good condition on a flat road, hills are near impossible. Range is also 10 miles maybe.

Mine is modified with a 48V 500W hub motor and Custom Lithium-Ion battery with 140km range. Didn't want to make it too fast, its still a plastic tricycle with drum brakes.
Goes 20Mph, not too fast but has a lot or torque and climbs hills with ease.
Other addons are mirrors and indicators,horn, alarm,... still i'm searching for the very rare original mirrors and indicators. I also made a centerconsole and dashboard with phone holder, charger and bluetooth radio.
Still have lots of work to do but it drives very well, i designed a new rear axle from scratch on the lathe with new wheels and off the shelf bearings as original spares are very hard to come by.

I guess there are only a handful in the US, most of them are in UK, Holland and some in Germany.
Laws for these kind of vehicles are different. Originally these are illegal in Belgium where i live so i had to modify it with a pedal sensor and electronically limit to 25 kmh.
 

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Never seen one in person, but I'm aware of their existence. Pretty cool that yours has been hot-rodded to use a better battery and motor setup. Is the new battery roughly the same physical size as the original would have been?
 
Never seen one in person, but I'm aware of their existence. Pretty cool that yours has been hot-rodded to use a better battery and motor setup. Is the new battery roughly the same physical size as the original would have been?
its about the same size yes, its 52V 42Ah lithium ion from sanyo cells.
I send drawings to a hobbyist to make me the best battery that could fit in the original battery 'tub'.
Amazing how far battery technology has come. it also a huge weight loss.
 
yeah batteries are definitely more energy-dense than they used to be. More power for their size and weight.
 
It truly was the first ever idea for a mass produced cheap electric vehicle.

Not counting the all-electric two-wheeled vehicles manufactured in France since the Late Fifties:

- Solex (circa 1957 to ...)
- Mobylette (circa 1955 to ...)

There are a few others, but I don't think they date to the Fifties.

My next-door neighbor has an original Solex all-electric scooter/bicycle of 1966 vintage. I have driven the thing. Pretty cool ride.

PS: I just checked at Leboncoin, France's online selling portal and (by far) most popular outlet for used (and even new) vehicles of all types. I did not find even a single listing for a SINCLAIR vehicle ... pretty unusal to not find @ least a single item of anything in France, so this SINCLAIR trike must be a very scarce item.

Considering that Solex and even Mobylette two-wheeled cycles, in excellent nick, are routinely fetching €1000-1,500, I am surprised the Sinclair "trike" is stuck @ €1000 in running condition, nearly new-new €2000-€4000. Given the (IMO) generally high prices of vintage motor vehicles in The EU Zone, I'd have expected something as rare as the Sinclair to be more in the range of €1000 in running condition, nearly new-new €3000-€5000.

In any event the Sinclair "trike" is pretty cool and I'm gonna add this vehicle to my weekly "search macro" @ Leboncoin.
 
Exactly a year ago i stumbled upon a for sale ad for a weird electric tricycle.
I fell in love with it the moment i saw it and bought it for €250.
In my opinion a classic design icon like the Delorean.

This was Sir Clive Sinclair's (inventor of the sinclair computers) idea of the electric vehicle revolution. It truly was the first ever idea for a mass produced cheap electric vehicle.
Sadly it was an awful flop and only a few thousand were sold.
Too ahead for its time and the british weather and traffic just does not suit it.
Where i live in belgium or holland with its perfect flat cycle roads its awesome to get around.

Now since the inventor passed away these go around €1000 in running condition, nearly new-new €2000-€4000.

There is now a very active community restoring them and its absolutely lovely with people designing and 3D printing replacement parts

Technically its very dated, 250w brushed 12V motor with a lead acid battery, controlled by a relay.
U need to pedal up to speed them press a button for the motor and i can get up to 15mph in good condition on a flat road, hills are near impossible. Range is also 10 miles maybe.

Mine is modified with a 48V 500W hub motor and Custom Lithium-Ion battery with 140km range. Didn't want to make it too fast, its still a plastic tricycle with drum brakes.
Goes 20Mph, not too fast but has a lot or torque and climbs hills with ease.
Other addons are mirrors and indicators,horn, alarm,... still i'm searching for the very rare original mirrors and indicators. I also made a centerconsole and dashboard with phone holder, charger and bluetooth radio.
Still have lots of work to do but it drives very well, i designed a new rear axle from scratch on the lathe with new wheels and off the shelf bearings as original spares are very hard to come by.

I guess there are only a handful in the US, most of them are in UK, Holland and some in Germany.
Laws for these kind of vehicles are different. Originally these are illegal in Belgium where i live so i had to modify it with a pedal sensor and electronically limit to 25 kmh.

It's pretty darned cool.

If nothing turns up in France, 'll start checking the German online vehicle vending sites .... I am only a 15-minute drive to Allemagne, where France~Germany~Luxembourg meet in .... Schengen. Yeah, that Schengen.
 
Exactly a year ago i stumbled upon a for sale ad for a weird electric tricycle.
I fell in love with it the moment i saw it and bought it for €250.
In my opinion a classic design icon like the Delorean.

This was Sir Clive Sinclair's (inventor of the sinclair computers) idea of the electric vehicle revolution. It truly was the first ever idea for a mass produced cheap electric vehicle.
Sadly it was an awful flop and only a few thousand were sold.
Too ahead for its time and the british weather and traffic just does not suit it.
Where i live in belgium or holland with its perfect flat cycle roads its awesome to get around.

Now since the inventor passed away these go around €1000 in running condition, nearly new-new €2000-€4000.

There is now a very active community restoring them and its absolutely lovely with people designing and 3D printing replacement parts

Technically its very dated, 250w brushed 12V motor with a lead acid battery, controlled by a relay.
U need to pedal up to speed them press a button for the motor and i can get up to 15mph in good condition on a flat road, hills are near impossible. Range is also 10 miles maybe.

Mine is modified with a 48V 500W hub motor and Custom Lithium-Ion battery with 140km range. Didn't want to make it too fast, its still a plastic tricycle with drum brakes.
Goes 20Mph, not too fast but has a lot or torque and climbs hills with ease.
Other addons are mirrors and indicators,horn, alarm,... still i'm searching for the very rare original mirrors and indicators. I also made a centerconsole and dashboard with phone holder, charger and bluetooth radio.
Still have lots of work to do but it drives very well, i designed a new rear axle from scratch on the lathe with new wheels and off the shelf bearings as original spares are very hard to come by.

I guess there are only a handful in the US, most of them are in UK, Holland and some in Germany.
Laws for these kind of vehicles are different. Originally these are illegal in Belgium where i live so i had to modify it with a pedal sensor and electronically limit to 25 kmh.

Hey, I'm not far from Belgique: y'all got a Belgian "Leboncoin" type thing going over there?

PS: Checked and yeah, there are a few Sinclair C5 models available in UK.
 
Iirc, the Sinclair electric car started a rather ambitious concept for a practical urban transport, and gradually scaled down to what looked like a parking lot toy for adults. Not unusual for his clever ideas crippled in execution. A fairly successful international standard coat pocket battery powered television receiver with a 2 inch Telefunken oscilloscope type electrostatically deflected crt and rather fragile plastic trim. (I have one), a semi-successful low priced ZX-80 based hobby computer with a stutter prone bubble keyboard and flakey accessory sockets that could repeatedly reset the computer if an outboard memory was plugged into it, leading to destructively directed frustration. And a nifty DIY LED digital wristwatch kit in a flimsy leaky case that came apart under moderate stress. A history of brilliant concept stumbles.
 
Interesting. I've never heard of the C5. Something about small electric vehicles appeals to me though. Found this kind of funny dated promo video. I didn't realize Lotus was involved.

 
Dean Kamen's Segway PT was a much more elegant and practical execution of the C5 concept, however not possible when the C5 was finalized.
In my memory and mind, I think Sir Clive's original concept was something like an electric Smart Car, an upscaled golf cart-ish enclosed small street legal car. DC brush commutator motors and battery tech was still in the glorified golf cart stage, with Ni-Cad cells the only practical alternative to the widely used lead/acid cells (disregarding nickel/iron Edison cells).
 
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Not counting the all-electric two-wheeled vehicles manufactured in France since the Late Fifties:

- Solex (circa 1957 to ...)
- Mobylette (circa 1955 to ...)

There are a few others, but I don't think they date to the Fifties.

My next-door neighbor has an original Solex all-electric scooter/bicycle of 1966 vintage. I have driven the thing. Pretty cool ride.

PS: I just checked at Leboncoin, France's online selling portal and (by far) most popular outlet for used (and even new) vehicles of all types. I did not find even a single listing for a SINCLAIR vehicle ... pretty unusal to not find @ least a single item of anything in France, so this SINCLAIR trike must be a very scarce item.

Considering that Solex and even Mobylette two-wheeled cycles, in excellent nick, are routinely fetching €1000-1,500, I am surprised the Sinclair "trike" is stuck @ €1000 in running condition, nearly new-new €2000-€4000. Given the (IMO) generally high prices of vintage motor vehicles in The EU Zone, I'd have expected something as rare as the Sinclair to be more in the range of €1000 in running condition, nearly new-new €3000-€5000.

In any event the Sinclair "trike" is pretty cool and I'm gonna add this vehicle to my weekly "search macro" @ Leboncoin.
Oh never heard of those. Must be more of a french thing. The sinclair are very popular in netherlands i live close to the border. U can pick up a project one for €200-300.
 
Oh never heard of those. Must be more of a french thing. The sinclair are very popular in netherlands i live close to the border. U can pick up a project one for €200-300.

Solex and Mobylette are of French origin. Solex, as far as I know, only made the 'electric bike' deals, while Mobylette manufactured e;etric and ICE powered vehicles -- all (again, as far as I know) 2-wheeled, though Mobylette was sufficiently large and well-capitalized that it might have put forth a 3-wheeled model somewhere along the line. I'll check.
 
Oh never heard of those. Must be more of a french thing. The sinclair are very popular in netherlands i live close to the border. U can pick up a project one for €200-300.

Re: Project Sinclair C5

I have @ present two "vehicular projects" going (er, not going, I s'pose): a 1960s URAL (big bike w/ sidecar manufactured in USSR) and a Auto Union / DKW (AUDI) "MUNGA" FWD "jeep" ... a 1961 model, which is taking MOST of my spare time. So projects I have up to here; if I were to snag a Sinclair C5, it'd have to be a "project @ 98% or better completion.
 
Solex and Mobylette are of French origin. Solex, as far as I know, only made the 'electric bike' deals, while Mobylette manufactured e;etric and ICE powered vehicles -- all (again, as far as I know) 2-wheeled, though Mobylette was sufficiently large and well-capitalized that it might have put forth a 3-wheeled model somewhere along the line. I'll check.
yeah my mom had a 2-stroke mobylette :) she went to school and work with it still in the garage where she left it in 1988. then i was born and 15 years later dragged it out and it started immediately with some fresh 'melange'. i used it to scare the sheep. good times. now im 33 and its been sitting in the same corner. hope some day to get it and restore it.
 
yeah my mom had a 2-stroke mobylette :) she went to school and work with it still in the garage where she left it in 1988. then i was born and 15 years later dragged it out and it started immediately with some fresh 'melange'. i used it to scare the sheep. good times. now im 33 and its been sitting in the same corner. hope some day to get it and restore it.

Hey, I forgot to ask earlier: which model Mobylette bike?
 
Just to point out something, the sinclair was legal for anyone over 14 and needed no license. not like a moped or car.
 
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