Anybody seen a quadruple chainset before?

[orange71]

I haven't :shock:

http://cgi.ebay.co.uk/quadruple-chainse ... dZViewItem

 

[Corduroyboy]

Man! That thing has got its own gravitational field! :shock:

 

[NickD]

The BB would need to be 1/2 a mile long :shock:

 

[gump]

key thing - why??

Already plenty of overlap on rear, even with roady blocks. If range increased, ok. Butg its not.

 

[orange71]

it must weigh 1.5kg on its own looking at how it's made. Looks pretty cheap.

 

[Ziggy]

One of my local bike shops sold a 'orrible cheap thing with that chainset (or similar) - IIRC it only had a 6sp on the back, & it did indeed weigh about 8 tonnes.

 

[one-eyed_jim]

Have a Google for "Mountain Tamer Quad"

 

[haggis]

One of my local bike shops sold a 'orrible cheap thing with that chainset (or similar) - IIRC it only had a 6sp on the back, & it did indeed weigh about 8 tonnes.

I think i remember seeing such a steed

 

[Benandemu]

Have a Google for "Mountain Tamer Quad"

Yes, a popular advert that used a bullseye crank from memory.
The extra granny ring was a 20 tooth I think.

 

[one-eyed_jim]

Yes, a popular advert that used a bullseye crank from memory.
The extra granny ring was a 20 tooth I think.

Potentially as low as 16. They used Suntour splined freewheel sprockets.

http://www.abundantadventures.com/mt_plus.html

Here's one on a tandem:

http://mgagnon.net/velo/pedalier4.en.shtml

There was also the Avid Microdapter that converts a 74mm granny ring fitting to 56mm, letting you run a 20t microdrive grany gear. I'm looking for one.

In principle, a Campag Record OR crank could be used with four cogs: one normal chainring, two splined cassette sprockets, and a track cog replacing the lockring. I'm not sure the lockring thread would hold up to the punishment though...