what kind of alumium is showa or kyb upper fork tubes made of ?

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6/21/2018 4:53 PM
Edited Date/Time: 6/21/2018 4:53 PM

anyone know the kind of alloy aluminum SHOWA RM and CR 47mm and 49mm upper fork tubes are made of?

or the kayaba 48mm YZ forks tubes alloy are ?

been trying to find out for years and I have no idea ?

if someone can confirm this would be great ?


6/22/2018 3:35 PM

Not sure of the exact alloy, but the WP upper tubes are 7000 series aluminum. I'd bet all the others are 7000 series as well.


Billy Wight
Luxon MX
Motocross Components Engineered for Performance

6/22/2018 6:42 PM

6061 or 7000 series.