My 1" AME-era sub3 weighs 336g with the insert, cut for a 54cm frame so it's not too bad. It seems like every fork maker that still makes 1" quotes that weight and not the 1 1/8".
It cut perfectly square with abrasive wheel spinning at 30,000 RPM while the shaft was slowly rotated. No splintering.
Just as I figured, the steerer ISpulltruded CF. Do NOT substitute ANY insert as this tube has EXTREMELY low resistance to the stress expanding-type nuts produce. You must use the insert to add torsional and longitudinal shear strength to the steerer. And the gluing process is very critical. You must wet BOTH surfaces and allow the epoxy to fully fill the gap. Putting the insert in rapidly will starve the bottom of the insert of epoxy, resulting in only partial bonding. Not good.
With glue, insert and crown race (15g), the entire fork weighs in at a svelte 354 grams. Contrast with 595 grams for the original and it looks much better. I shall see how it handles
The bike is now 276 grams lighter at a little over 1$ per gram cost!
Darn it, I screwed up and cut it too long. I don't know what happened since I cut it EXACTLY the same length as the one it replaced, including the insert flange thickness. The top cap might be the problem since the insert is smaller inside diameter than the STEEL steeer it replaced. I have 5mm of spacer on it already so it looks like another 4mm is necessary. I have no spacers on hand other than those in use so I think a single 10 mm Douglass will be on order.
I'm comfortable with this setup and it does work. I would however think twice if you’re "robust" or need more than 2cm of spacers.
Of course that is just my .02 and I also don't buy bike parts for the warranty. I do pick parts that I believe have a superior design and are lightweight at the same time. (This could open a can of flames so I have my flame retardant suit on)
"Ride lots." -- Eddy Merckx
Click Here to see my Scott CR1.
Those who ignore histroy are doomed to repeat it.
BTW, I rode my favorite closed circuit course yesterday for the first time with the new fork. I ma impressed with the now rock-solid tracking. Much better crit fork.
When I cut mine down, I'm going to call it a Sub3.4362, or whatever it comes out to....