Factor Ostro

[MysticRiver]

7.5kg ready to ride bike, inclusive of bottle cage, powermeter pedals, computer mount, only things missing that wasn't weigh was Wahoo computer and Rear light.
Size 52 Racing Green colour.

That is the right way to measure it. UCI rules are to remove anything easily removable (saddle bag, light, computer, bottles, etc) and then must be >6.8. So people who measure without cages, pedals, or computer mount are cheating.

[kode54]

What we need is more data to see if and by how much weights are changing. It has been a bit of a moving target with the Ostro. Even with the weight gain the Ostro is still very much at the lighter end of the spectrum for aero frames. I was a bit disappointed I didn't get a chance to get mine on a scale - it was out of my hands. Would be nice to get some independant aero data on the Ostro as well.
https://cyclingtips.com/2022/07/we-foun ... ostro-vam/

Yes, of course, right now we have like a regression line with a couple of datapoints

From things seen around, I find cyclespeed's Ostro on the lightest side of them all.

I have an O2 VAM with the gen3 fork, and this bike is sitting slightly above to 6kg for me with 11speed DA, BUT with 1120g wheels, Red cassette, Gelu saddle/seatpost integrated combo which itself is only 135g altogether, and D1 Quarq - so no major weight gains anywhere left. The frame was 750g with hangers, the fork was 365g when cut. Gaining close to 300g on (deeper and wider) wheels, some 100g on seatpost/saddle, 100-200g on frameset, suggests 6.6-6.7kg for comparable light Ostros.

Could you share a photo of your bike? I am really interested in the Gelu saddle/seatpost combo. How do you like it?

Sent from my SM-T970 using Tapatalk

I have a Gelu seatpost saddle combo but didn’t have rails so I could mount up my tail light (C14 mag from Lupine). Also I needed the aero post (used the Gelu combo on o2 VAM initially). So I ended up with a Darimo 15mm setback T2 post and Berk Lupina. Still waiting on the Darimo (backordered).

[kode54]

Do you have an build list? Could be very useful!

My 52 Ostro is 6.25kg, not sure why so many seem to be over 7kg, it really isn't difficult to get below 7kg......

Basically;

DARIMO seat post
AX Lightness saddle
Rotor Aldhu Carbon crank
DECADENCE 48 and 58mm carbon tubs (so quite deep wheels)

The rest is all standard stuff, with DA 9200.

If I went really exotic I could go below 6kg.

I have THM Clavicula SE crank w Carbon Ti rings.
Waiting on Darimo seatpost
Standard DA9200
Black Inc integrated bars
Enve SES 6.7 w sealant

And my weight is UCI 6.81kg
Not sure how to get it down to 6kg. Seems so out of reach. I even cut some of the handlebar off at the drops!

[Boshk]

Do you have an build list? Could be very useful!

My 52 Ostro is 6.25kg, not sure why so many seem to be over 7kg, it really isn't difficult to get below 7kg......

Basically;

DARIMO seat post
AX Lightness saddle
Rotor Aldhu Carbon crank
DECADENCE 48 and 58mm carbon tubs (so quite deep wheels)

The rest is all standard stuff, with DA 9200.

If I went really exotic I could go below 6kg.

That's amazing, mine is 7.5kg but thats with:
Favero Assioma duo pedals
1 bottle cage
Blackinc computer mount (no comp)
rear red reflector

Even if I switch spec from ultegra 8170 12 speed with 11-34 cassette to DA, its still only 300g saving.
Seatpost makes a difference though, Darimo 95g vs Factor 182g
saddle AX vs Berk 90g vs 95g
Rotor crankset (not sure your weigh) ....ultegra is over 700g

[cyclespeed]

7.5kg ready to ride bike, inclusive of bottle cage, powermeter pedals, computer mount, only things missing that wasn't weigh was Wahoo computer and Rear light.
Size 52 Racing Green colour.

That is the right way to measure it. UCI rules are to remove anything easily removable (saddle bag, light, computer, bottles, etc) and then must be >6.8. So people who measure without cages, pedals, or computer mount are cheating.

My weight is with pedals, bottle cage (1 aero one) and Garmin mount (machined down by me!).

[cyclespeed]

Do you have an build list? Could be very useful!

My 52 Ostro is 6.25kg, not sure why so many seem to be over 7kg, it really isn't difficult to get below 7kg......

Basically;

DARIMO seat post
AX Lightness saddle
Rotor Aldhu Carbon crank
DECADENCE 48 and 58mm carbon tubs (so quite deep wheels)

The rest is all standard stuff, with DA 9200.

If I went really exotic I could go below 6kg.

I have THM Clavicula SE crank w Carbon Ti rings.
Waiting on Darimo seatpost
Standard DA9200
Black Inc integrated bars
Enve SES 6.7 w sealant

And my weight is UCI 6.81kg
Not sure how to get it down to 6kg. Seems so out of reach. I even cut some of the handlebar off at the drops!

Your crankset must be about 100g lighter than mine.
But you don't mention your saddle. Mine is only 75g so you are maybe +100?
+100 on seatpost
+150 on painted frame?
+50 on bigger frame?
+100 on discs? (mine are 160/40 XXYY)
And your wheels are likely 250 to 300g heavier than mine.

[wheelsONfire]

Have any of you guys asked Factor about "rolling updates"?
Might be the frameset itself have been beefed up!?
Either for better stiffness or durability? It wouldn't be that strange.
Didn't Factor say they had it's own factory which again might address certain issues very fast.
This could very well include a slight revision of fork, seatpost or frame.

[wheelsONfire]

On the subject of weight - 7.01 kg as shown without bartape.
Size 56,
120/42 barstem
DA Di2,
Lightbicycle WR50
Vittoria Corsa 2.0 30mm rear, 28mm front
Schwalbe Aerothan inner tubes
Ultegra cassette
SQ Lab saddle (275 grams)

Very happy with the final weight - expected it to be heavier. Would be easy to get to 6.8 kg with the most minor changes

Quick ugly photo before bar tape

What's the saddle height and drop to bar?
In theory, this is probably same i would have it set up.

[kode54]

Do you have an build list? Could be very useful!

Basically;

DARIMO seat post
AX Lightness saddle
Rotor Aldhu Carbon crank
DECADENCE 48 and 58mm carbon tubs (so quite deep wheels)

The rest is all standard stuff, with DA 9200.

If I went really exotic I could go below 6kg.

I have THM Clavicula SE crank w Carbon Ti rings.
Waiting on Darimo seatpost
Standard DA9200
Black Inc integrated bars
Enve SES 6.7 w sealant

And my weight is UCI 6.81kg
Not sure how to get it down to 6kg. Seems so out of reach. I even cut some of the handlebar off at the drops!

Your crankset must be about 100g lighter than mine.
But you don't mention your saddle. Mine is only 75g so you are maybe +100?
+100 on seatpost
+150 on painted frame?
+50 on bigger frame?
+100 on discs? (mine are 160/40 XXYY)
And your wheels are likely 250 to 300g heavier than mine.

You’re on tubulars. Big savings there.

Berk Lupina saddle
Tuned Wahoo speedplays (Ti spindles, bolts and ring)
THM Clavicula SE Carbon Ti chainrings 52/36
DA 11/30T cassette
DA 12 speed group
380/110mm Black Inc bar stem
V10 computer mount
Enve handlebar tape
Factor seatpost (will swap to Darimo when arrives)
Factor direct mount RD hanger
Enve 6.7 (new version)
SRAM Centrrlin X 160/140 rotors
Conti 5000s TR 28mm
Orange sealant 45ml each tire

Dropping 300-350g from wheels on your setup or more?

Naked carbon paint. NOT white
52cm

[Mr.Gib]

What's the saddle height and drop to bar?
In theory, this is probably same i would have it set up.

5.jpg

I think you're saddle to bar drop is greater. I am at around 10cm. Difficult to measure with an SQ Lab saddle. All depends on where you sit on it. Can make as much as a 2 cm difference from nose to tail. In that photo of my Ostro, the saddle has not yet been leveled. The nose will come down significantly and the tail will go up.

[Mr.Gib]

...
Size 52 Racing Green colour.

I wanted to revisit the issue of fork steerer changes. In Boshk's build video https://www.youtube.com/watch?v=VmYjrU8JyOg the fork steerer appears to be without the threaded insert.
So back to this sort of thing:

Boshk's bike is certainly a recent production. I also assume my Ostro is a recent model and it to was without the threaded insert. My mechanic suggested my fork was the third revision. I always thought the threaded insert style was the latest greatest. Can anyone clarify the fork steerer situation? Could they be selling off old stock? Running with two iterations at the same time? The whole issue is a bit strange.

[wheelsONfire]

What's the saddle height and drop to bar?
In theory, this is probably same i would have it set up.
5.jpg

I think you're saddle to bar drop is greater. I am at around 10cm. Difficult to measure with an SQ Lab saddle. All depends on where you sit on it. Can make as much as a 2 cm difference from nose to tail. In that photo of my Ostro, the saddle has not yet been leveled. The nose will come down significantly and the tail will go up.

Haha, you pinned it down talking saddle, level and actual BB to saddle distance (in the middle mine is about 77cm). I ride on the front aswell as pushed back, so i need to have a nose dip because otherwise the perineal nerves start to complain. The cut out isn't that long on this saddle.
I think i have about same drop as you.
I am often very bent when i ride at the hoods. Almost same as in the drop zone.
If i lower the handlebar i tend to slide forward since the drop will be too low. With the bar higher i push back more in the seat.
Actually i'd like a more compact drop because i need to adjust for the drop-zone comfort.
If drop would be 120mm, the top section would be 5mm lower.

I really dislike SQ Labs saddle. It's way longer than mine, but the comfort zone is one spot (for me).
I have tried but it just doesn't work.
I am really not sure if i would ride 110 or 120mm on size 56. Looking at just reach, it would be 120mm. But if i like you used Shimano instead of Sram, i think i'd go with 110mm. Srams shifters have a very short reach, so it's a bit tricky.

My bike, reach 380mm, bar 80mm, Ritchey Chicane -10/ 130mm + 2mm spacer.
Stack 578mm, headset top cap 5mm, spacer 2mm.

Anyway, are you a happy camper with this bike, or what would you like to change (if anything)!?

[Mr.Gib]

I am really not sure if i would ride 110 or 120mm on size 56. Looking at just reach, it would be 120mm. But if i like you used Shimano instead of Sram, i think i'd go with 110mm. Srams shifters have a very short reach, so it's a bit tricky.

My bike, reach 380mm, bar 80mm, Ritchey Chicane -10/ 130mm + 2mm spacer.
Stack 578mm, headset top cap 5mm, spacer 2mm.

Anyway, are you a happy camper with this bike, or what would you like to change (if anything)!?

Sounds like you should go for the shorter stem. The Black Inc bar seems to stretch things out a bit beyond the stated 80mm reach due to the curve of the drops and how that effects lever location. I ended up turning my levers in for more wrist comfort. Feels much better but worried I look like a poseur douche.

I am finding the Ostro to be excellent. I can't fault it. We speculate that it could be lighter, but then the ride or durability or both could be comprimise. Not worth it for less then 100 grams. It's still very light in its category.

[kode54]

Agree with Mr. Gib. The hoods are about 6mm stretch as well. I normally ride with 120mm on a O2 VAM with older 11 speed shifters.

On the Ostro 110mm length with 12-speed is very close to the same.

[Boshk]

Have any of you guys asked Factor about "rolling updates"?
Might be the frameset itself have been beefed up!?
Either for better stiffness or durability? It wouldn't be that strange.
Didn't Factor say they had it's own factory which again might address certain issues very fast.
This could very well include a slight revision of fork, seatpost or frame.

hmmm...good idea, maybe I will email them about it.