Immediately Noticeable
The first big change that is immediately noticeable is that the Mk4 now comes with a rear brake. All Mk4s have the Tektro R539 Long Drop Brake mounted on the rear forks. To make sure the brake is in the perfect position we have made slight adjustments to the frame and fork. On a bike the brake would normally be mounted on the outside of the forks, but on a Penny Farthing you would kick the brake every time you mounted or dismounted. So, to stop this happening we have made it so the brake can be mounted on the inside keeping it nicely out of the way. You will now find that the internal cable routing exit port is located on the right-hand side, just above where the cable attaches to the brake calliper. This keeps the cable nice and tidy, no need for the cable to cross over.
The New Cranks
The next big change is the cranks, Mk4s now come with Nimbus VCX+ ISIS cranks. These cranks are picked from the Unicycle world and are prefect for the Penny Farthings. Firstly, they are a super tough 6061 T-6 aluminium crank which will handle almost anything. These cranks also have three pedals holes at 100/125/150mm. This means you effectively have three pairs of cranks in a single pair. On Unicycles and Penny Farthings you change the gearing by changing the length of the cranks. Longer the cranks the easier it is to climb up that hill, shorter the crank the faster you can go. Now with the VCX+ cranks you can swap your pedals up and down the holes, depending on the riding you’re doing. Just remember to set both sides in the same hole.