Support road.cc

Like this site? Help us to make it better.

TECH NEWS

Lexus unveil electric prototype bike

Di2 Alfine Electric belt drive prototype? Say it ain't so

Car manufacturers have a long and (in)glorious history of knocking out the odd bike to lend a bit of green credence to their otherwise planet-mangling output. This one from Lexus is more of a design exercise than a brand addition since there are no plans to put it into production – only two exist, one of which is now in the UK – but it's an interesting beast nonetheless.

Built around what looks like a 20" wheelset and a cruciform frame the bike it's most reminiscent of at first glance is the Giant Mini series, but the similarities end with the shape. The Lexus is a full carbon beast for a start, featuring 'L-Finesse design language' apparently, and nestling near the bottom bracket is a 26v Lithium Ion battery that powers a 240W motor in the front hub. Lexus claim the bike has 'All wheel drive by means of a belt system' but unless there's something really clever going on inside that frame we'll take that to mean that you can pedal the bike as well.

Most interestingly of all, the Lexus claims to have 'an electric eight-speed Shimano internal gear system, which references the sophisticated eight-speed shift-by-wire automatic transmission of Lexus’s LS 600h limousine'. What that means in practice is that Lexus appear to have managed to marry Shimano's Di2 levers with some manner of electric shifter for a rear hub gear. The hub in question looks like an Alfine unit in natty anodised blue. Whether this mash-up is something that could spawn a production electric shifting system isn't clear - we don't think we've seen an electrically operated Shimano hub since the four-speed Auto-D back in the late '90s.

Weight wise the Lexus is okay rather than special at 17kg, and we don't know how far the battery – which Lexus claim takes just 2 hours to charge – will propel you. There's energy capture from the braking system to eke a bit more life out of it, anyway. The bike was first seen in 2009 at the Tokyo motor show but Lexus are planning to show it off over here as part of their sponsorship of the Great British Bike Ride (http://www.greatbritishbikeride.com), a four-day sponsored ride from Land's End to Twickenham in aid of Rugby charities the RPA Benevolent Fund and the RFU Injured Players Foundation, as well as Help for Heroes.

Dave is a founding father of road.cc, having previously worked on Cycling Plus and What Mountain Bike magazines back in the day. He also writes about e-bikes for our sister publication ebiketips. He's won three mountain bike bog snorkelling World Championships, and races at the back of the third cats.

Add new comment

8 comments

Avatar
dave atkinson | 13 years ago
0 likes

That LFA supercar looks *so* tidy though  1

Avatar
dave atkinson | 13 years ago
0 likes

they weren't sniffy, just didn't know anything about it other than the PR info we already had, and weren't interested in putting me in touch with anyone that did. obviously there are bigger fish to fry, like trying to persuade rich folk that a 5 litre, V8 equipped hybrid is somehow 'green'

Avatar
nick_rearden | 13 years ago
0 likes

Last cycling event I went to, Dave, there were some pretty nice cars in the car park. Funny that Lexus would be sniffy, probably thinking that a website about cycling couldn't possibly have any car buyers reading it. But then Lexuses (Lexa, Lexi?) do have a reputation for being driven by crusty old codgers with golf bags. And no brakes, which goes without saying.

Avatar
OldRidgeback | 13 years ago
0 likes

Seeing as it's Lexus, do the brakes work?

Avatar
dave atkinson | 13 years ago
0 likes

just spoke to Lexus UK who were singularly unhelpful and weren't able to put me in touch with anyone who could be more forthcoming, sadly. So I can't tell you whether Lexus have developed some kind of electric shifting unit for the Alfine hub for this project, or whether they've just bunged the levers on the front and a box at the back as 'proof of concept'

Avatar
John_the_Monkey | 13 years ago
0 likes

why is it that car makers always seem to make the most godawfully ugly bicycles?

Avatar
TRs Blurb n Blog | 13 years ago
0 likes

I think it probably uses an assisted front wheel drive like this http://road.cc/content/news/6449-worlds-lightest-electric-bike

Avatar
demoff | 13 years ago
0 likes

Is it not a little ironic that Lexus are sponsoring the great british bike ride.

Adds to the mantra that cycling is the new golf I suppose.

Latest Comments