Showing posts with label British. Show all posts
Showing posts with label British. Show all posts

Wednesday, May 11, 2016

For Sale: Humber Special with steering dampener

     We recently got this bike and I offer it for sale today. It is a Humber Special with a large size frame. It has the Humber cranks and fork. What is really cool about the bike is the steering dampener on the non-drive side of the headtube. See photo. Basically there is a band of metal inside the head tube which wraps around the steerer and when you tighten the lever it tightens around the fork steerer increasing resistance to steer the bike. I am not really sure of the application, maybe a security measure? the bike also has early Sturmey Archer hubs. The rear is stamped KB4 and has the cool early logo on the hub. Also of note is the fact that it is blacked out. Schwinn blacked out their parts during WWII. I am not aware of British manufacturers doing the same. Also this model dates to around 1932-33, well before WWII.  Maybe it was just an aesthetic choice? Very cool. The rear hub also has a drum brake. The front is drum brake as well. The shifter is a K-Series (see photo) top tube mount. The serial number is K17994. It has original decals and paint as well as original gold striping. The seat tube measures 26" length and the stand over height is 36" (with air in the tires). Wheel size is 28".
               Please see photos for reference and email me at: bikeville@gmail.com with any questions.
Cost is $900.00
Local pick up is preferred as this bike will be expensive to ship because of size and weight.
































Monday, October 26, 2015

Awesome Shop Bike: Bob Jackson racing trike

      This is a bike / trike that I am surprised never made it to the blog yet. I was reminded of it because earlier in the week a similar trike came to my attention offered for sale on central NJ Craigslist. My size even! Here is a link to the listing. Bob jackson trike craigslist

image 1
      The above photo is of the one for sale (no affiliation to us).
  
     Ours is roughly from 1974 and the shop has owned it for close to 15 years. It is left hand drive, set up for British roads. Below is an explanation of the difficulties one can encounter riding such a set-up on American roads / tracks.
   A single-sided drive trike -- especially a British single-sided driven by the left rear wheel -- presents problems, (or let's say potential challenges) to an American riding it on the right-hand side of the road. A left-side driven trike, in Britain, would tend to push one up out of the shoulder of the road surface toward the crown of the road -- a good thing -- compensating as it were for gravity and road surface. However, the opposite is the case if ridden on the right-hand side of the road, where the machine would tend to pitch one down the camber of the road into the margin, so that, to stay out of the shoulder, one would be constantly correcting against the mechanical impulse of being driven doward. With a one-wheel drive you're correcting anyway, but if you're also correcting for having a "wrong-side" drive, it's much more pronounced. 

     While I am not an expert on all the details of trike differentials, a differential will help compensate for the difference between the two rolling rates of the the rear wheels whilst turning and so provide better tracking around the bends. As you no doubt know, turning at speed on a trike is a tricky business to begin with! (taken from an email on the CR list regarding British trikes in the USA)


 Ours is built from Columbus tubing, of note is the dual front brake set up and the unusual front brake cable hanger that mounts to the stem clamp. another detail at the back end is the use of Bottom bracket cups for the rear axles and the indented chain stays (as if a single rear wheel would be used !?). Very cool / rare piece that needs to be ridden more. Enjoy the photos!