What does the JJ signify in a wheels spec?
02-20-04, 02:15 AM
#1
Infamous...Butcher...
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What does the JJ signify in a wheels spec?
I have noticed all the Japanese manufacturers have a J or JJ notation after the wheels diameter. Is this some sort of load rating or manufacturing process?
And I dont believe the Jamba Juice thing Max.....
And I dont believe the Jamba Juice thing Max.....
02-20-04, 02:36 AM
#2
Super Snuggles
"JJ" refers to the shape of the wheel's flange (lip which holds the bead of the tire).
JJ = 18.0mm high x 13.0mm wide, with a 13.0mm radius
J = 17.5mm high x 13.0mm wide, with a 9.0mm radius
JJ = 18.0mm high x 13.0mm wide, with a 13.0mm radius
J = 17.5mm high x 13.0mm wide, with a 9.0mm radius
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02-20-04, 11:43 AM
#8
Super Snuggles
Originally posted by $150FC
is there a real advantage to one over the other?
is there a real advantage to one over the other?
Manny, by my math, the J flange has more material because of the smaller radius on the inside edge, 9.0mm vs. 13.0mm. Barely. Again, it makes little difference.
02-20-04, 01:38 PM
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Thanks Jim! IS this a worldwide spec , or foreign only. I havent seen it referred to on any of the HREs or Kinesis we have gotten, nor the other US based wheels..
02-20-04, 02:21 PM
#10
Super Snuggles
Originally posted by BicuspiD
Thanks Jim! IS this a worldwide spec , or foreign only. I havent seen it referred to on any of the HREs or Kinesis we have gotten, nor the other US based wheels..
Thanks Jim! IS this a worldwide spec , or foreign only. I havent seen it referred to on any of the HREs or Kinesis we have gotten, nor the other US based wheels..
Kinesis, HRE, Fikse and other CNC/machined wheel manufacturers probably wouldn't have this information on their wheels, especially since most of them machine wheel centers to combine with pre-formed "hoops" (which include the flanges, obviously), and many don't manufacture those hoops themselves. I didn't think to check my Kinesis wheels when I had them because obviously it wasn't that important. Maybe someone who has a set of this type of wheel can comment.
Considering that many of the major manufacturers of P-Metric tires are domestic, I would assume that it is a worldwide "spec", but that domestic wheels don't include this information unless they're manufactured outside the United States.
