The Kyosho OT-6 parts bag contains 2 swing shafts (dog bone style) as used on all the ZX models. Note the ZX-R, ZX-R mk2 and ZX-RR use universal joints at the front.
Alternatives
The OT-6 dogbones are 62.5mm long from pin to pin
- 92645 is listed as 62mm or 63mm mentioning “OT6/TR15”. They are more beefy though, so on acute angles they might interact with the axle cups a bit sooner
- OT-228 (rere Ultima and Optima) is listed as 62mm but seems to be the exact same size
- OT-272 (rere Optima Mid) is listed as 64.7mm and might be too long if you’re running a lot of camber
