John B said:Not Responding said:My offspring are at the stage where they are too big for bike seats or the trailer but not really
to be trusted to ride their own bikes on the road. In order that the now traditional summer
family rides can be maintained, I am thinking of getting a child-back sized tandem.
We have brought up our children through the trailer/tandem/solo route and it has proved perfect.
but I wouldn't go for a kiddie back tandem.
An alternative is to fit kiddie cranks, together with a rear stem extension and perhaps upright
bars, to a normal tandem.
Don't they sell "child adapters" in the UK? These consist of a bottom bracket shell, bottom bracket
and small size crankset, made to bolt onto the seat tube of a tandem at a convenient height for a
child. The one I used back in the mid 1970s was custom made for me by the folks at Bud's Bike Shop
in Claremont CA - I bought the bike from a young fellow named Bill McCready, who later went on to
found Santana Cycles. Mine bolted onto the rear seat tube with muffler clamps, but the latest ones
are very well made, are easy to fit and remove, and do not damage the bike.
Quoted message said:Our children have all ridden this way from about 3 and a half years old and the cranks can be
adjusted downwards as the child grows, whereas a kiddie back tandem just becomes too small without
introducing enormous seatposts etc.
Yes, you can adjust the kidback adapter downward, until at some point you can simply remove it. You
can also switch back and forth between a child stoker and a full sized one with the latest adapters.
With mine, it was a permanent commitment.
Quoted message said:Be careful though, as choice of frame is important for kiddie cranks. Some tandems have an awkward
diagonal tube intersecting the seat tube which can either prevent fitting, or reduce the possible
future adjusment.
The "marathon" design is seldom encountered any more. It was much more expensive to make and harsher
on the stoker than the direct lateral design, which seems to be about the only type found on newer
tandems. With the direct lateral, the diagonal tube joins the back of the bike at the stoker's
bottom bracket -- perfect for kidback adapter use.