As stated elsewhere I have never had a 50 mm axle and consider them inferior to the 40 or 30mm in many respects. I have run a 40mm axle and machined the outer section of the hubs to allow the axle and rim to slide through to give desirable rear track adjustment not possible with a 50 mm setup. I have always used tubular sleeves on all axles to prevent inward movement of the hub, movement of the axle , and to use the bearing grub screws as intended ie to prevent the inner bearing race rotating on the axle , not to resist the high lateral loadings in cornering. Given that with a standard 50 mm axle and unmodified hubs it is possible to use a standard Nyloc and washer why use k nuts? . Given that a 17mm stub resulted in more bending of the kingpin cf the 15mm. The much longer 25mm stub must worsen this situation even with a 10 mm pin.However we are talking about failures resulting in parts becoming separated from the kart. None of the drawbacks you have listed for the smaller dia axle, all easily remedied resulted in such a failure. You say the 50mm axle is 'stronger'. In what way? It would seem that the normal point of failure is around drillings for a key inboard of the inner axle bearing? Not needed on most karts. Vast majority have not failed yet!
|
|