Saturday, September 25, 2010
Bob Jackson tandem
I have had the frame for about 20 years, but have not ridden it since the mid '90s.
Earlier this year I had some good rides with Gayle on Worrall's tandem, so I decided to build this one up with modern components so that we can shift gears while climbing or sprinting out of the saddle
Fortunately, when I was younger and stupider I had respaced the dropouts back so that a modern rear wheel would fit.
A J-Tek Shiftmate corrects the cable pull of the 10 speed Campag shifter for the 9 speed cassette.
Cranks are Suntour Superbe Pro, rethreaded by Bruno at Cycle Express, on Campagnolo Veloce 111mm bottom brackets.
Because of the curved seattube, the front derailler needs to be positioned a couple of centimeters further back, hopefully easy to achieve by making an aluminium packer to go between the mounting bracket and the derailler.
The brakes are self-energising cantilevers. Front is Scott SE, rear is Suntour XC Pro.
All the Bob Jackson tandem photos