My 70mm long grade 10.9 M10-1.25 bolts arrived yesterday.
I pulled out an old baseplate from a Puaida truck that was retired long ago, as it had a super wobbly kingpin.
That 3/8” splined Kingpin tapped so easily out from the baseplate, I had to chuckle.
it measured 9.49mm on the shank/ unthreaded portion.
The M10 bolt would not hand thread in from the bottom, but it would from teh top, so I did so and then used a tool with very little pressure to thread it through the bottom.
Then it easily hand threaded from the bottom up to the shank.
I then took my angle grinder to the 17mm Hex head to get it to fit into the baseplate.
Slowly. I tried to keep it cool and a water quench never sizzled.
The new kingpin seated dreamily, pulling it with spacers by bolt threads with a Nut. No more Kingpin wobble, no more kingpin weakening splines, more bolt diameter, more strength, yeehaw..
The Mini has been using a caliber two front truck on ~ 14 degrees of wedges, and I wanted a bit more turn for the lean. I remembered the Puaida trucks seemed to be a bit more twitchy, more turn per lean, so i put Newly kingpinned Puaida baseplate onto mini with Puaida hanger, and swapped my 105mm meepo ‘donut’ wheels and my same bushing stack.
The Mini test roll with m10 Kingpin on Puaida front truck did certainly change the handling, for the better.
I am using the same bushing stack at the same tension but the turn radius was a bit shorter, and it seemed both trucks had the same turn, with back wheels in the same track as front instead of swinging wider, despite the rear being dewedged by 7 degrees.
The M10 Nylock stop nuts i ordered are tall/ thick have a flanged bottom side, and I learned the hard way they have some threadlocker pre applied.
I need to order some riptide pivot cups and bushings.
I have pictures and more info in this thread:
I had started a wobbly kingpin thread I will likely update too.
I will be replacing each and every 3/8” kingpin, splined or not with M10-1.25 grade 10.9, even on the baseplates with non wobbly kingpins.
I have a MBS ATS.12 truck on the front of the Guppy. Its 3/8” kingpin was the most wobbly.
After Kingpin removal I saw that the Kingpin receptacle was not perpendicular to the base, and just yesterday I noticed that the Pivot cup recess is not centered either. I now see this specific baseplate as a lemon not worthy of a new kingpin.
I got the MBS trucks mainly as I feared fatigue of my 270mm 10mm axle ‘Vevor’ MTB TKP truck and thought he hanger had bent.
I then learned of venom 1212’s incident with the hanger pivot snapping, and while I am using one of these trucks on my front, I do not trust them. I swapped to my other MBS ATS.12 baseplate and hanger 200 miles or so ago and this baseplate kingpin is not yet wobbling, but I have not inspected it as closely to see if it as as much of a asymmetric lemon as my other one.
Anyway I like the handling of these TKP trucks, but I fear the pivot snapping and trying to kill me.
I am considering contacting Tito and seeing if he will sell a single flatboard 270mm front Duality truck. I cant really afford a pair of trucks, and only need one at this point.
The meepo 540 hub motors are good enough for Flat Florida.
I can traverse some grassy sandy areas with some throttle to spare.
I like their silence.
The brakes are strong. They have been maintenance free other than sleeves, and reliable.
I’m not ready for everything required to go gear or belt drive and do not need their extra capability at this point in time.
I just want a 270mm front truck for a flat deck, that is not going to streetface me, but I want it to have at least as much lean and turn as the TKP MBS ATS.12 that I am using now. I am going to keep using the Kenda 2.80-2.50-4 K473 Pneumies up front. They are awesome.
A channel truck like Matrix3 with singularity bushings would be more affordable, but I would need a ~30 degree wedge riser and I’d rather not go that route