The JR counter will fit on most bicycles with little modification. Remove the wheel from the bicycle and slip the counter over the axle on the LEFT side. Put the wheel back on the bicycle with the counter between the fork and the wheel. Tighten the wheel securing nut or lever.
Counter mounted on bicycle.
CAUTION: IMPORTANT - DO NOT ATTEMPT TO ROTATE THE WHEEL OR RIDE THE BICYCLE UNTIL YOU HAVE CHECKED FOR PROPER CLEARANCE. YOU MAY DAMAGE THE COUNTER.
Wiggle the wheel back and forth just a little. If the large counter gear rubs against the fork the fit is not correct. This can sometimes be corrected by installing a washer between the outer side of the counter and the inside of the fork. Try this. If free rotation without rubbing cannot be obtained, the counter cannot be used on your bicycle. This is usually because the forks have "shoulders" that encroach on the space between the fork and hub flange.
If the tang does not sufficiently engage the spokes, an alternate installation is possible by installing the JR between the locking nut and bearing cone. See below. Otherwise, the wire can be used to drive the tang.
Check for clearances!
If you are unable to fit the counter to the bicycle using washers, it may not be possible to use the counter on the bike.
Again – before attempting to rotate the wheel, check for interference. If you do not do this you may damage the counter. We will not be responsible for damage due to improper installation. There are 100 million bicycles in the USA and the JR will not fit all of them.
Below is a collection of photos of some possible options you might find helpful.
The JR, fits the majority of bikes with no modification. However, some bikes have front wheel geometry that makes installation difficult. In some cases with the 2008-2014 chassis, the drive tang (the little bent-over piece that is pushed by a spoke) got bent or broke off. This is highly unusual in the current model. When the counter is put on the bike, and the axle nut tightened, there must be some play, or shake, in the metal gear. The tang should be free to rotate between the spokes it contacts without rubbing on the hub flange. If there is any binding at all, the unit must not be used until the binding is eliminated. If this is not done, the tang may be bent or broken.
We supply replacement chassis to fix bent chassis.
The manufacturer of the Veeder-Root counter used on the Jones counter recommends that rotation not exceed 500 rpm. In riding terms this amounts to about 17 mph or 25 km/hr. Many get away with riding faster, but forewarned is forearmed. Overspeed may cause damage to the working parts of the counter.