Hi,
I'm Tara
from Bandung city - Indonesia,

Here is my sub 4kg Road Bike Project,
The Cervelo R5vwd.
My Goal is 3.7kg this time, but still have some parts to test,
a few days a go, It touched 3780kg with modifying M2Racer heads but failed when tested on rough surface

I recalculate each parts using two digital scales & pictured it already

here is the specifications :

Frame : Cervelo R5 Vwd size S - 724gr
Fork : AX-Lightness - 226gr
Heads : Mixed FSA & Custom Adaptor - 52gr
Handlebar & Stem : AX-Integrated - 207gr
Brake Lever : Modolo Kronos : 98gr
Brakes : AX-Lightness
Shifter : Custom ACW put on the head spacer - 56gr
Bar Tape : OEM 24gr
Seat Clamp : M2Racer - 8.2gr
Seat Post & Saddle : AX-combo - 125gr (uncut)
Bottle Cage : BTP - 5gr w/Ca bolts
Chain : Yaban 104link - 206gr
Crank Arm + Chainrings + Bolts : THM Clavicula, Fiber Lyte - 396gr
BB : Stock Sram - 88gr
Pedal : Tuned Aerolite TT - 48,5gr (tested for 80km up & down hill !!)
Wheelset : Extralite - 838gr
Tyres : Tufo Elite - 244gr
RD : Lightweight - 106gr (I already have the 99,8gr Sram Red, Tuned by AFC, will put on next time)
FD : Record w/BTP tuned - 55gr
Sprockets : Recon 11-23 - 87gr (Gold colour w/1000miles used)
Skeewers : Tune Skyline Road - 17gr
Cables : Power Cordz - 17gr
Housing : Alligator - ???
TOTAL - 3780gr

Still missed the target but hope could improved next,
At least could be the lightest road bike in Bandung or in Indonesia next..

I need suggestion from you all to make it 3.5kg.

Here I add some pictures,
also including some pictures from Light weight bikes fun competition in Borobudur temple last weekend,
My bike at 1st place, second place at 4,3kg Guru Photon, 3rd Bike also my bike LOOK 695 Ultra Mondrian at 4,6kg

The bike was finished to ride at 80km distance veteran race in 1 group at 3hours10mins,
24km uphill, flat & long descent to finish line in Borobudur Temple, Central Java.
My bike is the lightest now in Indonesia & get USD550 prize money

Please check the pictures,
Theres some unique modification that made by ACW custom - Bandung. (Shifter, pedal, etc)
another next pictures add below posts.

thx for seeing & comments

Have you got BTP clamps on you brake levers? will they fit.
Could your jockey wheels be lighter .?
Check out Donalds bike , cables, tuning, you would need to be brave though.
Very nice indeed .well done Sir

Awesome Built!!!! I did my Guru Photon and its 4.25 with Sram Red. I think you can save at
least 50gms on yr wheelset as yr wheelset weighs in at 1186gm, mine is 1133gm with AX
skt 24, Pillar ti, Token cogs, Carbon Ti QR & Tufo 130 tubs. I use a modiefied Rear D which
is only 99.3gm.

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NA

Congratulations on your build.

Very well researched and executed - separated brake/shifter = saving of at least 100+ g over a SuperRecord, integrated seat post/saddle and stem/handlebar etc even a little "game cheat" - your <120g Tufo elites (more of a track tubbie and I am sure there will be many flames coming this way for the choice, but what the heck, this is a true ww build).

What else to cut weight? Very marginal at your already very ww build and may tend towards "surgical and cosmetic solutions" - tape till just the bend of the drops, saw off any excess from the skyline skewers, removing the wheel decals (itself at least -5g). You didn't mention about steerer tube top cap and spacers but I think you are using the tuned ones already. Really talking about a few grams here and there, tops 20g off or so.

The big difference is therefore your wheel set - they seem heavier than earlier Extralite builds (including mine) that have been mentioned in this forum of circa 780-790g stock from Extralite. These were built using the first version of Edge 1.24 rims, Sapim CX Ray spokes and extralite ultrahubs. Extralite used to sell them as the "HyperClimb moon climbers".

Some have tuned this original Extralite build to M5 front hub and Pillar Ti spokes to achieve 715 to 720g http://www.cyclingtechblog.com/2009/03/03/new-lightest-wheels-in-the-world-715-grams/. This was back in 2009. Now there are options of AX SRT24 rim and lighter Dash hubs.

Based on the reported weight, your version seems to be the version 2 strengthened ones (Edge/ ENVE 1.25). So, depending on your weight (I am 70kg and have no problems with my Extralite Edge 1.24 build which I have owned for 2 years), you may want to source for the lighter earlier 1.24 version Edge rims, rebuild using Pillar Ti spokes and perhaps even lighter hubs such as DASH. This could cut more than 100g off to be closer to your target. Be warned though that spoke breakages have been reported for the Pillar Ti spokes http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=97206. So you may want to custom build CX Ray for drive side rear and use Pillar for the rest.

Happy experimenting. BTW, can you give us a summary of how you got about getting the integrated post-saddle and stem-bar from AX?

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Current Bikes: Storck F0.6 6kg , Storck Aero2 7.04kg
Storck Organic Light 11.1kg , Storck F0.7IS Di2 4.8kg

@Holiday - very nice portable weighing scale. Can you give more details? Get another scale to weigh that scale.

Eyeing your wheel set. Can I borrow the pair some day to try?

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Current Bikes: Storck F0.6 6kg , Storck Aero2 7.04kg
Storck Organic Light 11.1kg , Storck F0.7IS Di2 4.8kg

Well that very light. What it like to ride?

_________________
www.thecycleclinic.co.uk

You have a nice, very light bike. I was wondering if you have weighed the complete bike on a scale. I have weighed each individual part, frame, etc., on my bike, but when the bike is all built up and the complete bike put on a scale, the weight is more than the total of all the individual parts. Could you show a picture of the bike on a scale, showing the weight.

shave down all your clear coat on your frame !!!
you may touch 3.5kg

MANTAP !!!!

Wow, this is Weight Weenies!!!

_________________
'Tape was made to wrap your GF's gifts, NOT hold a freakin tire on.'

Follow me on twitter. I try to be interesting
On Facebook!

Great weight. I'm not crazy about the shifters, but it's a nice way to lose weight. How does it ride? Is the seat angle level? It looks to be angled up and painful

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RUEGAMER 5.21kg, 11.48lbs

CRUMPTON 4.40kg, 9.70lbs

Here is the continues parts in scales pictures

Here is the last sessiosn of the spare parts on scales,
One pictures also showed my another lightweight bikes :
Sub 6 kg Steel Tommaso 1995 productions at 5,7kg (this is my lovely beauty everyday bikes)
Sub 5 kg Carbon LOOK 695 Ultra at 4,6kg
I will post those two bikes specifications next time

hope could be our references to make my usable bike lighter in future.

Have you got BTP clamps on you brake levers? will they fit.
Could your jockey wheels be lighter .?
Check out Donalds bike , cables, tuning, you would need to be brave though.
Very nice indeed .well done Sir

Yes I've got btp clamps already & modifying into old Modolo Kronos brake levers,
I try 2 jockey wheels as pictures (fiber lyte & afc)
I will check donalds bike..
thanks a lot

@bm0p700f

The 1st time I ride this bike feels scary, I'm 62kg now.
at the time I use normal steel Brake & Shifter Cables to test.
The tires using Tufo elite 160 with 210psi.
The weight when tested at 3,9.

I'm trying to get the feeling on this bike.
The cervelo frames never been my issued but the AX fork, AX Integrated Handlebar & AX Seat Post Combo became my pointed test.

Compare to my sub 5kg LOOK 695 Ultra, this bike is still quiet stiff.
The only things I feel a lot is the vibrations on my hand.

And when do the real test at local veteran road fun race 80km last weekend,
it feels strange & very fun,
On long descent inside the peloton we run 45-55km/h, feels great with no problem until the finish line (I'm using tufo 120 tires)
The 49gr Aerolite pedal that made myself also run without problem.

I don't know what to say.
But this bike rideable for training or race.

Thanks,
tara

210psi seems a bit excessive no?