[Yak] tandems - for young stokers
John S. Allen
jsallen at bikexprt.com
Tue Mar 30 20:07:06 CDT 2010
At 05:07 PM 3/30/2010, Geof Gee wrote:
>Where do you find four (+ 1/2) inch cranks?
My son began his tandeming career with a kidback (raised bottom
bracket clamped to the rear seat tube) and that might even be
necessary on a Friday tandem with a kid as little as mine was when he
started. We used a high-riser handlebar tilted back to reach him.
Photo of our tandem setup is at the bottom of the page at
With the low rear saddle on the Family Tandem, it might be necessary
to remove the rear cranks and bottom bracket axle and use front drive
and a diagonal chain (as on my tandem) to avoid interference with the
kidback cranks. Or else use a long seatpost and raise the kidback.
With a higher saddle, it is necessary only to tie the rear pedals
horizontal when using front drive and a kidback.
Tandems East, a tandem specialty shop, has a Web page with cranks
shorteners and 127 mm (5 inch) cotterless cranks --
http://www.tandemseast.com/parts/cranks.html. One of the kidbacks is
by Burley, which is in Eugene and was founded by the Scholzes who
went on to found Bike Friday.
I made my own kidback attachment. The cranks I used are from an old
Raleigh child's bicycle and are steel, cottered cranks.Most cranks on
small child's bicycles this country are one-piece steel cranks for
Ashtabula bottom brackets (the kind with the large bottom-bracket shell).
John S. Allen
jsallen *at* bikexprt.com
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