With 115 grams in 350 mm length, Darimo Carbon T1 Aero Factor Ostro Straight is the lightest seatpost in the world compatible with Factor Ostro frames. It's made in Spain with high quality standard and materials. It's compatible with road racing use and also gravel and cross use.
It's a vertical seatpost with 0 mm offset and a clamping system with 2 bolts. It's compatible with round (7 x 7 mm) and oval (7 x 9 mm) rail saddles both also carbon fiber made. It has got a wide ratio of tuning and it's compatible also with modern geometry frames.
Darimo Carbon T1 Aero Factor Ostro Straight seatpost is available in 250/300/350/400 mm length. On demand you can also order a seatpost with custom length (in this way you can save more weight).
Main tube design is optimized to obtain the best stiffness/weight ratio possible, so has got a limited reinforced clamping zone (between two white marks) :
Before placing an order, please be sure to choose the proper seatpost length, measure the length of your seatpost out of the frame. Measure from seatclamp to saddle rails. Then choose the appropriate size following the chart indications :
The main tube is made of carbon fiber using bidirectional and unidirectional fabrics with an studied asymmetrical laminate to achieve the optimum combination of minimum weight and maximum of resistance. Each seatpost is laminated by hand to achieve a record weight keeping in mind the strength and your safety. To do this, at each point of the seatpost there are a different numbers and arrangements of carbon fiber layers. The layers arrangement is obtained after finite elements analysis and destructive testing.
Seatpost yokes are made of 7075T6 aluminum CNC machined to achieve smooth edges suitable for any type of rails, carbon rails included. seatpost cradle is made of carbon fiber and it's optimized to allow the best seating for the saddle rails.
The bolts has got M5 diameter and are grade 5 high quality titanium made with forged head and rolled threads. Black anodized color finishing. The front bolt has got a special design head with through holes which allows micro-tuning if required when there isn't enough room to use an hex wrench. The bolts are screwed up onto 7075T6 aluminium nuts. The rounded shape of this nuts allow a correct load distribution without local stressed points.
With 115 grams (350 mm length - UD fabric), Darimo Carbon T1 Aero Factor Ostro Straight is the lightest setapost in the world compatible with Factor Ostro frames! +/- 3% tolerance, UD finishing adds about 4 grams.
Lightweight but also absolute safe, Darimo Carbon T1 Aero Factor Ostro Straight seatpost was designed with the help of modern CAD software and FEM analysis and easily pass the standard ISO 4210 tests! The maximum rider weight limit allowed is 90 kg, but on demand a custom seatpost for heavier bikers could be produced (consider about +15 grams added for a 400 mm length seatpost).
We recommend to install Darimo Carbon T1 Aero Factor Ostro Straight seatpost with the help of a good quality torque wrench following user manual specs (6 Nm max for seatclamp and 4 Nm max for seatpost yokes bolts). It's also very important to verify correct frame preparation to avoid any sharp edges (please follow user manual instructions, you can find the user manual inside the seatpost package and also inside the "download" section).
Seatpost tube can be produced with carbon fiber 3k twill or UD unidirectional fibers final layer with matte or glossy finishing, the cradle is always 3k twill (matte or glossy, matching the tube finishing), seatpost yokes and bolts are black anodized.
Decals are sticker type, 3k twill seatposts usually comes with white "Darimo" written and red Darimo logo, UD finishing seatposts usually comes with all black Darimo written and logo for a "stealth" look. Custom color decals are possible on demand. Please use the order notes to let us know your choice or write us by e-mail.
Darimo Carbon T1 Aero Factor Ostro Straight seatpost comes with a package which contains also user manual (English language) and installation pack with sand paper and carbon fiber mounting compound. There's also a label to certify product real weight.
Darimo Carbon products are handmade and custom made with many sizes, finishing and lamination. The number of possible combination is very high so usually Darimo Carbon do not stock them and produce on demand.
Products that are available in our warehouse has got "IN STOCK" indication. All other products combinations has to be ordered from Darimo and this will takes about 8-10 weeks.
These products has to be considered ordered on demand so the right of withdrawal can't be applied to. This kind of order require advance payment for total amount.
All Darimo Carbon products are 100% Made in Spain.
- Weight :
- 115 gr. (350 mm) +/- 3% - UD finishing +4 gr.
- Offset :
- 0 mm
- Length :
- 250-300-350-400 mm
- Tube Material :
- PrePreg Hi-module Carbon Fibre
- Hardware Material :
- Carbon fiber cradle, 7075T6 Aluminum yokes, gr.5 titanium bolts
- Finish :
- 3K or UD, matte or glossy
- Graphics :
- Bolts :
- Special CNC Grd5 Titanium
- Use :
- Road racing, Gravel
- Fitting :
- With Factor Ostro frames and with 7x7 or 7x9 saddle rails both
- Max rider weight :
- 90 kg
- Max tightening torque :
- 6 Nm (clamp) - 4 Nm (saddle)