Factor Ostro

[mathias720]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

1. There are way lighter saddles than berk.
like GELU

2. Tires you could save some depending what you are going for 8but could sacrifyce performance

3.could go for a quarq+sram red crankset and save some aswell.

4. could go for a full titanium or aliminium cassette.

5. what about bottle cages ? go for carbon works if you want the lightest

6. garmin/wahoo mount, you can save some with going for a 3d printed version (magcad and i have made one for the black inc handlebar at 13 gram)

7.rotors ? maybe go for 140/140 galfers.

8. centerlock rings, go for KCNC

[CustomMetal]

That seems really heavy for the spec!

[cyclespeed]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

Are you sure that weight is correct? I'm struggling to see where the weight is and our bikes are quite similar, frame, handlebar, etc.
OK, so 450g for the wheels, but that still leaves 800g to find.
Your crank is lighter than mine. (I have Rotor Aldhu carbon)
Your pedals are lighter than mine (I have DA)

Strange.

[Co0kieMonster]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

Sorry that I have to ask, but are you sure your new Enve 6.7 are just about 1400 g with Chris King hubs? Enve itself lists them with 1497 g with their own hubs which should be lighter than Chris King hubs.

[kode54]

I never weighed them. LOL

I was just guessing but you're right, they are typically heavier than Enve's hubs.

[kode54]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

Are you sure that weight is correct? I'm struggling to see where the weight is and our bikes are quite similar, frame, handlebar, etc.
OK, so 450g for the wheels, but that still leaves 800g to find.
Your crank is lighter than mine. (I have Rotor Aldhu carbon)
Your pedals are lighter than mine (I have DA)

Strange.

Yeah. Okay, so the wheels at most maybe 600g+. I have no paint on mine. Matte clear over carbon with black logo/lettering, so not a heavy coat of paint. I went with the lightest option for paint. BTW, I'm using a Feedback scale. My cranks are 110BCD, 52/36T Carbon-Ti EVO rings. semi-wireless set up...so no wires to shifters. Maybe I need to double check with a friends digital scale to see if its any different.

[kode54]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

1. There are way lighter saddles than berk.
like GELU

2. Tires you could save some depending what you are going for 8but could sacrifyce performance

3.could go for a quarq+sram red crankset and save some aswell.

4. could go for a full titanium or aliminium cassette.

5. what about bottle cages ? go for carbon works if you want the lightest

6. garmin/wahoo mount, you can save some with going for a 3d printed version (magcad and i have made one for the black inc handlebar at 13 gram)

7.rotors ? maybe go for 140/140 galfers.

8. centerlock rings, go for KCNC

answers:
1. I have a Gelu F combo...and also a Berk combo (saddle bonded to post). Can't use both, the Berk combo since its 27.2mm post, so is the Gelu. But i most likely won't go that route since the Lupina fits well.

2. Tires, yes...but ever so slightly. I had 30mm on, but went with 28mm to save a bit of weight.

3. No power meter at all...so THM Clavicula SE is lightest option with Carbon-Ti chainrings.

4. Could go with full Ti cassette...I was just being practical and also, I went from 11-34T down to 11-30T to save additional weight.

5. I have Carbon Works cages...but again, I use Mandibles for their holding power on bottles. I lost a bottle with the CW cages so I took them off. Only a few grams more.

6. Again, yes, I can use 3D printed mount...but snapped one so I never went back to 3D printed. I did gain a few grams going with the adjustable angle Black Inc. one.

7. I want to stay with 160F/140R centerlock rotors since I'm in a hilly area. The SRAM Centerline X are fairly light...not as light as the Gaffers.

So basically, a few grams here and there...nothing massive saved or gained.

[seventyseven]

I'd double-check the wheel weight and the whole system on a different scale as you said. You can see on cyclespeed's video there was a 300g difference at one point (not sure if different scales or just the difference between the scale being clamped or not).

[kode54]

Maybe I'll be pleasantly surprised that its lighter than on my scale. Scale is clamped onto the stand...but I tried it two different ways...the other, hanging.

[MysticRiver]

I have the newer light Enve 6.7 on and they’re about 1400g plus or minus. Saving 400g is definitely close to a pound (US .88lb) but can’t see saving anymore weight in my end.

All bolts are now titanium.
Frame size 52cm
Matte clear no other paint
Darimo 15mm setback post
THM Clavicula SE cranks
Carbon-Ti chainrings
Dulight Tuned Wahoo Titanium pedals
Berk Lupina saddle
Conti GP5000s TR 28mm tires
Black Inc 380 /110mm integrated bars
DA 9270 group
Hambini BB
Enve 6.7 wheels Chris King hubs
Lupine Neo bike light (battery off at weighing)

Even with these parts, I’m at 7.24kg

Which of the stock bolts aren't titanium? How much weight savings is replacing all of them get you?

[cyclespeed]

I'd double-check the wheel weight and the whole system on a different scale as you said. You can see on cyclespeed's video there was a 300g difference at one point (not sure if different scales or just the difference between the scale being clamped or not).

Yeah, that's because you can't weigh the bike holding the scale in your hand, there are micro fluctuations in your arm.
The only way to do it is to hand the scale off something, then weigh the bike.
My bathroom scale called it 6.1kg by the way, but that is only accurate to about 200g.

[Scott2017]

Either Factor's production weights vary wildly or someone's scale is way off.

[mrlobber]

We pretty much know that the Ostro likely has gone slightly heavier over the lifecycle of the model, as Factor have themselves admitted they make silent running changes (which, of course, is actually good).

Cyclespeed's Ostro, if I understand correctly, has 11 speed DA with 9270 calipers, so he could save 50+ g on a cassette (Red 1190) vs 12 speed DA right away, compared to kode54.

Also, FWIW, I've got an O2 VAM size 56 on 11 speed DA as well, hovering around 6kg with 1100g tubular wheels, subtracting 150g on wheels (plus cyclespeed's Ostro was 52, I think?), would net me around 5.8...5.85kg, the difference of 100 or so grams looks to be about right comparing O2 VAM vs Ostro frameset,

[Scott2017]

Thought there were some posts explaining how it actually got lighter or at least the fork did. Either way it seems clear that no amount of weight weenieing could ever make his bike close the gap, he's already basically done everything to it one possibly can and it's still over 7kg. Something is off here.

[cyclespeed]

I'm on DA 9270 12 speed (11-30 cassette).

My frame weighs 824g, (Flickr no paint) and the fork got lighter when they swapped it for the nutset model.