Speedo not working

As usual, click any image to zoom in.

Mark's C15 speedo wasn't working and we noticed that the speedo gearbox was loose on the back wheel so we took the back wheel off today to check.

Mark was worried that with the gearbox loose it would be damaging the cut-outs on the rear wheel hub as happened on my bike - see this post for details. However, the back wheel looks brand new and the speedo gearbox appeared to be working fine - you could see the worm thread on the gearbox turning when you spun the back wheel.

So, we headed up the other end and into the headlamp to look at the speedo and that is when we noticed that the top 4 inches or so of the speedo cable had snapped off! By inserting this bit of cable (see the bit at the bottom of the photo, next to the speedo) into a cordless drill and then into the detached speedo we were able to verify that the speedo was working (although it might be necessary to calibrate it in the future - see the earlier post on calibration).

By measuring the length of cable protruding at the speedo end and by referring to the earlier post on speedo cables, we were able to determine that a new 4' 10.5" magnetic speedo cable was what we needed to order.