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(1) Bones Super Reds: The Super Reds are highly rated by many skaters, and like the San-O's, they do not have built-in spacers but require external ones. In this comparison, I controlled for the spacers, and roughly evaluated Bones Speed Cream vs. San-O's Japanese grease.
(2) Loaded Jehu V2 bearings (double shielded): The Jehu bearings have built-in spacers, and Loaded uses a very high end "Japanese grease" in these bearings. In this comparison, I controlled for the grease (both being high quality Japanese), and evaluated the variable of built-in vs. non-built-in spacers.
I understand this is not precisely a "controlled experiment", but it did give me an idea of how well the San-O's stood up against some of the current industry standards.
The parameters I evaluated for each comparison included speed, ruggedness of turn (low and high speed), and durability over 20 miles. Two Pingers were used as "vehicles" of choice.
San-O's vs. Super Reds Results:
(1) Speed: Super Reds were faster (higher roll speed) when pushing on a level path or going down a slight incline in a straight line.
(2) Ruggedness of turns: There was definitely a quality difference. At slower speed turns, I noticed little difference. At higher speed turns, the grease in the SAn-Os appear to allow for greater buffering, so the turns are quieter and smoother. With the Super Reds, however, there were some wheel noise/rattle at the sharper, high speed turns, and this gets more pronounced with heavy leans.
(3) The performance/physical integrity of the San-Os did not appear to change much over 20 miles, whereas the Super Reds appeared to worsen. Two Reds bearings had bent shields and did not freely spin as they did at the beginning.
San-O's vs. Jehu:
(1) Speed: The Jehu bearings were slightly faster (higher roll speed) when pushing on a level path or going down a slight incline in a straight line.
(2) Ruggedness of turns: Similar to the Reds, there was definitely a quality difference. At lower speed turns, I noticed little difference. At higher speed turns, there were wheel noise/rattle with the Jehu's (even more than the Super Reds) and this became more pronounced with heavy leans.
(3) The performance/physical integrity of both bearings did not appear to change over 20 miles.
Conclusion: Quite frankly, I didn't think there would be a significant difference, but the San-O's anecdotally appear to be the superior "turning bearings" with great durability. They certainly suit the Hamboards quite well, which can elicit some of the hardest/heaviest turns. Speed differences between the bearings in this respect are irrelevant, as I don't think you're going to be racing a Pinger or the Classic downhill. The bottomline: The San-O's deliver in both "turn" performance and durability.
Check them out for yourselves.
Smooth and silence.I just can say.
Usually I use Bones and Independent Shake Junt and Ninja bearings.
I like Ninja Raijin bearings.BUT When I First ride Huntington Hop with San O bearings,I feel like smooth,and silence.
It is very quiety.No sounds rolling wheel.At midnight I ride Huntington Hop, there was No claim neiboughhood.
So silence and very comfortable.
SAN O bearing is faster than Bones celamic bearings.I dont know why.
Is this greese type?I dont know .but I used this bearing,I feel fine.not bad anyway.
When you have a chance, you will use this SAN O bearings with Hamboards!
Enjoy your Hamboards life!