Sinclair C5

Projects
Participants	Webmind
Skills	Bikes, painting, electronics, cleaning
Status	Active
Niche
Purpose	Fun

Got a Sinclair C5, needs fixing up and re-electrifying.

Todo

• Inventorise properties of C5
• Clean up and paint frame/chassis
• Decide on motorisation plan
• Fix-up frame etc
• Electrify

Specs

Sizes

• Front Wheel: 62-203 tires (12.5x2.5) total diam ~32mm inc tire, rim diam ~22mm, 10mm clearance of case
• Front fork width: 85mm
• Rear Wheel: 47-305 (16x1.75x2) total diam ~40mm inc tire, rim diam ~32, 18-20mm min clearance of case
• Y-Chassis: 540mm total outer distance, to motorside(left) ca 260mm, to right side ca 280mm ? (DOUBLE CHECK)

Wishlist

• 200km reach
• 25km/h uphill
• drive backwards
• disk breaks
• turn indicators

Wannahaves

• Raincover
• Wheelcovers
• Board computer + led display
• GPS (for speed & heading)
• Foldable pedals

Motorisation options

Front-wheel hub

• front-fork has default only 57mm width, which is hard to find hubmotors for

Rear-wheel hubs

• hard to find 16" single-shaft hub motors
• wheelchair motors

Engine on chain

• expensive

Original drive-mechanism

• requires odd belt
• only one wheel rear drive which is meh

Gallery

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See also

• History: https://en.wikipedia.org/wiki/Sinclair_C5
• Unofficial Service manual: http://c5alive.co.uk/oldstuff/pub/downloads/C5-UnofficialServiceManual.pdf (mirror: File:C5-UnofficialServiceManual.pdf)
• Specs: https://2nd-gear.blogspot.nl/2012/01/specifications-for-sinclair-c5-electric.html
• Repairing on a budget: http://www.c5owners.com/buying-a-sinclair-c5/restoring-a-sinclair-c5-on-a-budget
• New rear-wheel-gear-hub: https://www.cypax.net/projects/c5/blog/page13.php?language=en
• C5 owners site: http://www.c5owners.com/