Fidanza 143621 flywheel, 8.5lbs. or 10.5lbs.?

Hello,

Can anyone please help clarify the actual weight of a new 108-tooth Fidanza 143621 flywheel? About half of the online retailers I have checked lists it at 8.5lbs., while the other half lists it at 10.5lbs.

Fidanza used to list both the 109-tooth 143201 flywheel and the 143621 at 8.5lbs., but it turned out that the 143621 actually weighed in at around 10.5lbs.

From this comparison picture it is obvious why.

That was a few years ago, and I have come across people stating that since then Fidanza has switched to the lighter design with more of the backside aluminum shaved off for the 143621 as well. However, I am not sure how reliable those statements are.

Can anyone please confirm if this is true, or if the 143621 still weighs 10.5lbs.?

Thank you.

Can anyone please help clarify the actual weight of a new 108-tooth Fidanza 143621 flywheel? About half of the online retailers I have checked lists it at 8.5lbs., while the other half lists it at 10.5lbs.

Fidanza used to list both the 109-tooth 143201 flywheel and the 143621 at 8.5lbs., but it turned out that the 143621 actually weighed in at around 10.5lbs.

From this comparison picture it is obvious why.

That was a few years ago, and I have come across people stating that since then Fidanza has switched to the lighter design with more of the backside aluminum shaved off for the 143621 as well. However, I am not sure how reliable those statements are.

Can anyone please confirm if this is true, or if the 143621 still weighs 10.5lbs.?

Thank you.

Last edited by Matej
on 2013-05-31
at 08-15-40.