Chinese Di2 Disc

Discuss light weight issues concerning road bikes & parts.
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Klaster1
Posts: 213
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

@Ticlimax, how's the build going? Did you settle down with a frame choice? I'm looking for details about WCB-R-093 and search brought up your thread.

by Weenie


Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

Hi,

just had the frame delivered friday. Decided to keep the Carbonbikekits wheelset in the end. I've also ordered:
- Kalloy Uno stem
- DT Swiss through axles
- Ebay seatpost (to cheap not to at least check it out)

Still debating whether to build with r785 shifters or to change to new ultegra (will probably depend on whether anyone is willing to buy the old stuff).

Have also bought a new saw for cutting the seatpost and fork, and Effetto Mariposa Carbogrip and Carbomove (as an assembly compound and for the bolts).

Still need new tyres. I want to see more revieuws on the Vittoria Corsa Controls before I decide on that.

Anyway about the frame :):
Everything looks good, no sharp edges, cracks or defaults that I can see. Both frame and fork are a little heavier than advertised (906g without seat clamp, and 345g for the fork), but not horribly so. You should also note that they if you are looking to change the headset, it is the same as some specialised bikes have (Top: IS42/28,6 Bottom: IS49/37). Rather rare, but I have found both BBB and Wheels MFG to have it.

I am agonizingly busy at the moment with work, so not being able to continue building is killing me right know :D.

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

So I've almost gathered all of my materials and am starting to get a build going.

So far the list is as follows:
120mm Kalloy stem with ti bolts 108
Workswell carbon saddle 100
Workswell headset expander 59
Workswell headset 63
Seat clamp 24
Workswell fork 343
Workswell r-093 frame 906
Workswell size 42 WHB-010 handlebar 207
Ebay seatpost 145
2x Michelin butyl ultralight tubes 160
Sram Red 22 compact crank 175mm GXP 615
Schwalbe rim tape 24
Carbonbikekits 45mm with 24 Pillar 1420 spokes and Novatec 411/412sb-cl hubs 1533
2x Shimano rt-900 160mm rotors with lockring 265
Ultegra chain - filthy 242
Ultegra cassette 11-28 used 211
Dt Swiss RWS plug in road thru axles with 1 lever 68
Wheels Mfg thread together angular bearing bottom bracket 104
Di2 6870 FD + RD + Battery + Junction boxes and cables 497
Disc brake adapters and bolts 110
R785 shifters, BR-785 calipers, hoses and mineral oil 862
Dirty and used Vittoria Corsa 25mm tires 546
Bar tape 70

TOTAL 7262

Items in cursive have yet to be weighed and are estimates.
I would be absolutely over the moon with that weight, but I've an itching feeling I'm going to be disappointed when I actually weigh it. I'm guessing I've forgetting something. If a 5000 euro Canyon with the next gen di2 weighs 7,4kg, mine is probably going to weigh more. Can anyone point out the thing(s) I am missing?

Seatpost and fork are uncut (won't save to much but still), but I'll probably add some grams for assembly paste and grease. And then another 150g when my behind says no to the saddle :D.

dmcgoy
Posts: 43
Joined: Thu Nov 15, 2007 7:23 pm

by dmcgoy

Ticlimax wrote:So I've almost gathered all of my materials and am starting to get a build going.

So far the list is as follows:
120mm Kalloy stem with ti bolts 108
Workswell carbon saddle 100
Workswell headset expander 59
Workswell headset 63
Seat clamp 24
Workswell fork 343
Workswell r-093 frame 906
Workswell size 42 WHB-010 handlebar 207
Ebay seatpost 145
2x Michelin butyl ultralight tubes 160
Sram Red 22 compact crank 175mm GXP 615
Schwalbe rim tape 24
Carbonbikekits 45mm with 24 Pillar 1420 spokes and Novatec 411/412sb-cl hubs 1533
2x Shimano rt-900 160mm rotors with lockring 265
Ultegra chain - filthy 242
Ultegra cassette 11-28 used 211
Dt Swiss RWS plug in road thru axles with 1 lever 68
Wheels Mfg thread together angular bearing bottom bracket 104
Di2 6870 FD + RD + Battery + Junction boxes and cables 497
Disc brake adapters and bolts 110
R785 shifters, BR-785 calipers, hoses and mineral oil 862
Dirty and used Vittoria Corsa 25mm tires 546
Bar tape 70

TOTAL 7262

Items in cursive have yet to be weighed and are estimates.
I would be absolutely over the moon with that weight, but I've an itching feeling I'm going to be disappointed when I actually weigh it. I'm guessing I've forgetting something. If a 5000 euro Canyon with the next gen di2 weighs 7,4kg, mine is probably going to weigh more. Can anyone point out the thing(s) I am missing?

Seatpost and fork are uncut (won't save to much but still), but I'll probably add some grams for assembly paste and grease. And then another 150g when my behind says no to the saddle :D.


Pedals?

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

I'm weighing the bike without, to compare how my Chinese adventure turns out compared to the likes of Rose and Canyon.

dmcgoy
Posts: 43
Joined: Thu Nov 15, 2007 7:23 pm

by dmcgoy

Ticlimax wrote:I'm weighing the bike without, to compare how my Chinese adventure turns out compared to the likes of Rose and Canyon.


The weight sounds reasonable. My CX Di2 disc build is 7.96kg (viewtopic.php?f=10&t=148463). My frame, fork, wheelset, and tires are about 200 + 100 + 200 + 150 = 650 grams heavier than your build.

The 100 gram saddle is mostly useful for the scale. So, kind of cheating.

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

dmcgoy wrote:
Ticlimax wrote:I'm weighing the bike without, to compare how my Chinese adventure turns out compared to the likes of Rose and Canyon.


The weight sounds reasonable. My CX Di2 disc build is 7.96kg (viewtopic.php?f=10&t=148463). My frame, fork, wheelset, and tires are about 200 + 100 + 200 + 150 = 650 grams heavier than your build.

The 100 gram saddle is mostly useful for the scale. So, kind of cheating.


You never know if your butt likes it till you try though :). It would be so great if a cheap light saddle just fits me :D.

Rainysunshine
Posts: 3
Joined: Fri Dec 29, 2017 7:21 am

by Rainysunshine

Any updates to this build? Would love a photo!

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

Rainysunshine wrote:
Wed Jan 10, 2018 5:18 am
Any updates to this build? Would love a photo!
Building my apartment is taking preference over the bike :). The build is thus temporrely stalled. I did find out post mount adapters don't fit the frame, so I had to buy rs505 brake calipers. Shedding the adapters as well as going to 140mm in the back should at least loose a few grams.

Having no decent smarthpone, this picture is currently the best I can do...
Image
Image

ooo
Posts: 509
Joined: Sat May 21, 2016 12:59 pm

by ooo

may be try 140 front too?
'

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

ooo wrote:may be try 140 front too?
The 17g I'd save would be rather expensive. When (in a thousand years) I'll manage to wear it out, I'll consider it.

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

Finally got around to building it up!
Hoping to get a ride in soon, but (apart from some cable management) at least I can show some pictures.

Image
Image
Image

Eventually I'll probably put on a 'real saddle', some lighter pedals, and when I put on new tires I'll align the logo's with the valves :). I'll change the front rotor to 140mm at some point too, as I fond the current clearance between the fork and the rotor risky. As well as buying a phone with a better camera!

User avatar
Klaster1
Posts: 213
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

Ticlimax wrote:
Sun Feb 25, 2018 3:15 pm
I'll change the front rotor to 140mm at some point too, as I fond the current clearance between the fork and the rotor risky.
After checking my setup, it does look quite close indeed, no more than 1-1.5mm. Too bad I can't change the rotor back to 140mm wthout changing the front caliper too. What's the current bike weight? Really like how 45mm rims look on it, I'm torn between 35mm (lighter) and 45mm (looks and aero) for a new set of wheels.

Ticlimax
Posts: 90
Joined: Thu Aug 04, 2016 2:44 pm

by Ticlimax

Klaster1 wrote:
Sun Feb 25, 2018 4:15 pm
Ticlimax wrote:
Sun Feb 25, 2018 3:15 pm
I'll change the front rotor to 140mm at some point too, as I fond the current clearance between the fork and the rotor risky.
After checking my setup, it does look quite close indeed, no more than 1-1.5mm. Too bad I can't change the rotor back to 140mm wthout changing the front caliper too. What's the current bike weight? Really like how 45mm rims look on it, I'm torn between 35mm (lighter) and 45mm (looks and aero) for a new set of wheels.
I've ordered a cheap luggage scale (but also from China, in theme with the bike :)) so I'll know soon enough. It was estimated at 7,5kg with my 105 pedals. Lost some grams on the rear rotor (160mm -> 140mm) and by being forced to use flat mount calipers in stead of post mount + adapters. I'm hoping for 7,4kg now.

Would've dropped another 200g if I had gone for the new 8070 brifters and new pedals. New tires could also net 50g. Another 60g with a Bontrager xxx style integrated handlebar. 20g with a 140mm rotor in the front. 40g on one of those headset expanders I don't entirely trust. In the end, I can't really afford to get to weight-conscious with it. I'd have to switch to a current gen groupset to properly get it light.

With the rotor I've found that I can put a frame protector sticker on the fork without it touching the rotor. Reduces the clearance to less than a millimeter. But I'm hoping that, should the rotor touch the fork, I'll notice on the sticker before it ruins my fork.

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