My TanTan TT912 build

[TidyDinosaur]

My experiences with those brakes are really bad. They work OK in the beginning, but after a while and after a few bad weather rides they became very bad. Switched to hydraulic and I will never ever buy cable actuated disc brakes again.

[fluffycustard]

Really great to see updates on this, the price of TT bikes at the moment is painful. I would love to know the actual weight of this and if you manage to sort the rattling / things getting loose

[ejump0]

I still need to revisit the Versa BTA plate. its rocking against the arm cup, making annoying noises.
i will probably swapped the armcup to the ones on my Controltech aerobar kit on my TCR(currently the bolt is siezed).
swapped to my old  tcr giant approach saddle, since its lower stack. i may be in market for a short-nose saddle as my aliEx Pro Stealth saddle base getting soft n saggy

btw, this frameset used Sram UDH style hanger.

I finally got the bike completed, minus the temp crankset 
im a lil afraid to do bike photoshoot since its like a flag/sail, can topple at anytime when theres wind

Frame: TanTan TT912 size52 + IceCrack blue paintjob
Stem: TanTan alu stem 100mm
Basebar: TanTan HB096 400mm
Aero extension: TanTan HB086 44° + 80mm w/ 15° angled riser
Brake lever: Tektro TL720
Saddle: Giant Approach  (from tcr)
Crankset: 105R7000 170mm (from tcr)
Chainring: 50/34T (from tcr)
PM: xcadey xpower2 left crank 170mm (from tcr)
BB: ztto bb386-24 normal bearing
Shifter: Microshift BS-A11
RD: 105R7000 SS
Cassette: 105R7000 11-28
Wheelset: Parcours Chrono 77/86
Rotors: 140mm MT-RT900
Caliper: Onirii BR005 mechanical

Looks awesome, well done!
The whole thing looks stiff indeed. That seatpost is scary, i dont see how anything can deflect, so good thing you have fat tyres and steel spokes and not carbon ones. Make sure you follow recommended PSI and dont go italian by putting 100psi in 32C tyres. I have italian friends, i stopped trying to explain to them that it makes no sense to over inflate big tyres. Good, big tyres at the right PSI completely change a bike.
Such a chonly boi will never be light, if you check out triathlon forums, you will see people's bikes are super heavy, comes with the territory.
The bike looks like a sail, for sure it's going to be awful in cross winds Be careful when you see trucks, you can get pushed or sucked in hard on something like that, try not to die.

Thanks for taking the time to post, it's great to see Chinese TT frames.

Currently im still on 28mm gp5k front n back. once the rear worn out, definately gonna fit in 32mm. the cockpit felt a lil better now with the bartapes.
Since i already have the frame, folks can just AMA 

Really great to see updates on this, the price of TT bikes at the moment is painful. I would love to know the actual weight of this and if you manage to sort the rattling / things getting loose

in SG even 2nd hand tri bike market going at silly price for the age of the bike. my build(minus parcours wheelset) literally can get almost 2 new speedmax cf7 105 mech.
the headset rattling issue was sorted with the micro spacers that i forgot.
tomorrow i'll weight the bike

edit: it weights 10.3kg equipped as in pic. bta not yet attached.
heavy AF.
i did considered a lightweight build ala Sebastian Kienle Norseman Tri scott foil tt-cockpit, but decided to go proper tri frame geo

[fluffycustard]

From looking around a lot of TT bikes are around 9.0-10.5kg for mechanical, so it seems pretty comparable to an entry level TT bike. Its pretty tempting to get one

[ejump0]

today i just ordered the 54T Passquest ring and 105r7000 170 right arm crank on aliEx sales. 165 is too expensive for both side arms. expect arrival in 2weeks.

Where im at Speedmax CF7 forever notavailable, and importing Q.Roo PR or Cervelo Pseries will make em so expensive after shipping n tax. not much option for disc brake bike in local marketplace, though today i found a few expensive used pseries. the cf7 is advertised as 9.4kg. not sure how its 0.9kg lighter than my bike .. hmm...

btw, today i found out this tantan extension bar is factory/copy of profile design asc aerobar

[BadIdeasMakeGoodStories]

Any chance you can post a photo of the rear of the seatpost / saddle clamp? Curious to see if it's 10mm rail accessory compatible.

[ejump0]

yesterday the headset felt a lil loose(probably the bearings now has seated properly in the cups).
opened the stem cover n found my rear brake housing has been rubbing the notch. i did the housing a lil extra long anticipating easy stem disassembly to put into bag(the fork can be fully removed from head tube for easy bottom headset bearing access). put a bit of film protector tape hope it will mitigate the rubs

Any chance you can post a photo of the rear of the seatpost / saddle clamp? Curious to see if it's 10mm rail accessory compatible.

will these do?

[mattgolt]

Hey ejump0,

Hope you're fine and still rocking that blue rocket! Thanks for all the detailed pictures in this thread, I'm considering building a Chinese tt as well and I'm looking into this frame aswell as the velobuild tt023. Could you maybe share some pictures of the storage compartment by the seatube? How large is it?

Honestly speaking, I prefer the look of the velobuild frame, but it does not come with any storage whatsoever. What other frames did you consider before going for the tt912?

Cheers!

[ejump0]

currently is still having issues with headset. i believe the 2pieces micro spacers were not enough. after few rides the headset rocking again. temp solution is using my 5mm spacer till my ordered 1mm n 2mm arrives. 

also turned out my Racework saddle(aeolus copy) gave best comfort. but having issue the clamp always getting loose(happens with other saddles too). am waiting for loctite blue to arrive

Hey ejump0,

Hope you're fine and still rocking that blue rocket! Thanks for all the detailed pictures in this thread, I'm considering building a Chinese tt as well and I'm looking into this frame aswell as the velobuild tt023. Could you maybe share some pictures of the storage compartment by the seatube? How large is it?

Honestly speaking, I prefer the look of the velobuild frame, but it does not come with any storage whatsoever. What other frames did you consider before going for the tt912?

Cheers!

Hi matt
the storage at the seatpost is kinda narrow. attached are references using kmc chain box. its that narrow. you can fit tpu tube n hex-keys, but not quite some-bulky multitool or e-pump. not sure co2 cartrige fits as i dont use em. if you have short-skinny handpump, maybe might fit at where they design di2 batt would go(top tube, under bento box

back then i considered these frames:
- hongfu/dengfu
- avenger tm6
- velobuild
- winow/bxt tri frame
- tt912/915

i ended with 912 as it looked the most modern,with fat forks. and this frame design also used by Yeoleo T9/T9s, so kinda larger userbase.
tantan just released tt913, check that out.

[ejump0]

my thin spacers arrived on Friday.
the original 2x 0.3mm wasnt enough, so i tried 1mm. it seemed to do the trick. i also solved my bta cage rubbing the arm cup by using 7mm washers to raise the bottle cage. Also changed the saddle again, this time using shortnose Racework(bontrager aeolus). Nose shorter n lil wider than the Giant Approach.

today for the 1st time this year i went to the coastal road(theres 8km stretch) to test the speed.
the bike is so stiff, but crazy fast. i could ave 39kmh solo 16km loop without hitting max hr. my cycling fitness is subpar coming after fasting month, but i beat my TCR pb by a whole minute.

with this my bike is funtionally complete n ready for race. yey

just to share, i managed to get my SS RD to work with 11-34 casette by having that chain long. its for just in case i need climbing gear on some race course. for now im mostly on 15-17cog on 11-28

[ejump0]

after gettin frustrated by occasional road debris stapler n nail punctures esp on my rear gp5k 28mm, decided to slap on punture resistant clincher GP4season 32mm.
it seemed to fit, altho kinda sketchy on the non-drive side chainstay with 2mm clearance, while drive side have like 3mm clearance (may improve as tire thread wears out i guess). wheel arch has plenty clearance.
*Rim has 22.5mm internal width
tubeless tire just still silly expensive.
pumped the rear to 60psi, super comfort

[ejump0]

Had an accident n damaged my old crank-pm last month.

Was searching for r7000 165 cranks to replace, but theyre kinda rare n expensive. Grabbed myself Magene Pes p505 in 165mm lenght. While it uses bb386evo bb, p505 is compatible with tt912

[rockerplates.de]

i am in contact with the manufacturer but they seem not to be willing to include some threads for bento and or rear boxes....this is really a shame, as we would like to use this as a base frame to work with for our rockairlabs btas, risers we sell for canyon tts...
so our intention is to have a fully equipped tt with all boxes and custom made cockpits...
but the salesperson told me, no cannot do it, not safe?
well, it is always the same with the chinese sellers, they are 95 % there, but keep ignoring suggestion for making the product 100 % perfect and increasing sales..

i will keep bugging them :-)

nice bike by the way...

[ejump0]

i am in contact with the manufacturer but they seem not to be willing to include some threads for bento and or rear boxes....this is really a shame, as we would like to use this as a base frame to work with for our rockairlabs btas, risers we sell for canyon tts...
so our intention is to have a fully equipped tt with all boxes and custom made cockpits...
but the salesperson told me, no cannot do it, not safe?
well, it is always the same with the chinese sellers, they are 95 % there, but keep ignoring suggestion for making the product 100 % perfect and increasing sales..

im not really sure the history of this tt912/tt915 open mould frame and its manufacturer. tt912 has been out for so long since rim brake ver, and later got revised for disc brakes, udh hanger n 32mm clearance.
it seems to me like TanTan and mira-factory might be 2 different factory?

this yr tantan released tt913, while mira(with brand Falco) released 918.

[rockerplates.de]

i cannot find anything about the mira factory, can you help me with a link?