Merlin HP4R 50mm Brake Disc CarrierMerlin 50mm Brake Disc Hub HP4R Disc

30mm short rear hub

HRP Oil Can Bin 32" x 3-1/4" Deep

HRP Medium Lubricant Wall Tray

3' x 4' Angle Animal Air Filter

Standard on the 2018 TF3

-Maintains fabric breathability

Exhaust muffler mod

Stroke: 54

8" x 5" Dia 4" Inner Dish Polished Wheel - American

The R4 has an adjustable rear angle to match the many different chest angle shapes a driver may have and the front has a Velcro attachment strap with elastic for convenience and comfort

Visually the differences mainly relate to the form (the new version contains less air between the rim and tire) and anchor points to the hub that provided by the three series

Wiring Harness