Frame - Cˣ - Cross Carbon | Frame fit - Road Race | Tyre clearance - 35mm | Real Weight Including All Parts - Approx 1.85kg
IKUISTA Fit Recommendation
Bike:
—
· —
Important:
This tool provides a guideline recommendation based on the measurements you enter.
We cannot guarantee the recommendation is perfect —
flexibility, riding style, saddle setup, and personal preference matter.
Your final configuration and component choices
(size, stem, bar, cranks, spacers) are always your responsibility.
How to measure:
Stand barefoot against a wall. Look forward. Measure to the top of your head.
How to measure:
Barefoot. Place a book firmly into your crotch (like a saddle)
and measure from floor to the top edge. Most people are 65–95 cm —
if yours is far from this, check you measured in cm, not inches.
How to measure:
Measure bone-to-bone across shoulders
(acromion to acromion), not shirt seam to seam.
Bar width is measured center-to-center (c-c).
Riding positioni
What this affects:
This slider affects frame size, stem and spacers.
In a size-overlap zone a more comfortable position picks
a bigger frame + shorter stem (higher front end);
an aggressive position picks a smaller frame + longer stem
(lower front end).
Endurance
ComfortEnduranceRace
i
What this affects:
With clip-on aero bars your forearms rest on pads and your grip moves forward.
We then recommend a shorter stem and, between two sizes, the bigger frame —
a higher and more stable front end is easier to hold in the aero position.
The saddle often moves slightly forward and up in aero use.
Extra measurement (optional)
How to measure:
Measure suprasternal notch (base of throat) → crotch
(same point as inseam). Tape runs along the front of your body.
This refines frame size and cockpit/stem.
Most people are 45–65 cm — if yours is far from this,
check you measured in cm, not inches.
How to test:
Stand with straight legs and reach toward your toes.
Can't get near = stiff.
Reach your toes = average.
Palms flat on the floor = supple.
This tells us how low a riding position you can hold comfortably.
Your recommendation
Recommended size:
—
This is the bike frame size. Choose this when you order.
Saddle height:
—
Set your saddle to this height.
Measure from the top of the saddle down to the pedal,
with the pedal at its lowest point. Fine-tune to comfort.
Handlebar width:
—
Order a handlebar of this width.
Stem:
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The short part that connects the handlebar to the frame.
Order this length.
Spacers:
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Small rings under the stem that set the handlebar height.
Start with this amount.
Configurator link missing:
add configurator_url to the bike_model entry.
Tip: take a screenshot before going to the configurator.
Expected availability–
Missing components
Pay in parts – up to 36 months at 0% interest with Zaver financing.
Show financing calculation
With 36-month term–/mo
12 mo24 mo36 mo
Estimated monthly payment–
Estimated total cost–
Product price–
Setup fee–
Monthly fee–/mo
Interest estimate–
This calculation is an estimate. Currency conversion is indicative. Final monthly payment and terms are shown at checkout before confirmation.
Read financing terms.
Choose your preferred shipping partner at checkout. IKUISTA offers flexible delivery options through Vapaus and GoByBike, both trusted carriers. Select the option that works best for your location and timeline. Each carrier provides reliable tracking and professional handling of your bike or components, ensuring your order arrives in perfect condition.
If your bike doesn’t feel right within 30 days of delivery, we’ll help you dial it in. How the Fit Guarantee works
Ride with confidence. If your frame is damaged, we’ll replace it up to 20% of the frame price. How it works
Purchase Here - Add resale value and peace of mind. The frame warranty transfers to the next owner. How it works
Trade your Ikuista back toward a new one, at a value we set by inspection. We take back any Ikuista, whatever its age. How it works
Every bike is assembled to order in and individually quality-checked before leaving our facility. Estimated dispatch time is approximately 2 weeks from the date of purchase.
Hand over the whole bike at the end of its life. No dismantling, no sorting. Our partner Kuusakoski recycles it all, metal and carbon alike, back into raw material. Read more
Components
Components
FRAMESET
Frame: IKUISTA Fluxi Cˣ Carbon Monocoque
Sizes: XS, S, M, L, XL
Colours: Glacier Teal / Nordic Alloy
Fork, front and rear axles: included
Headset bearings and UDH hanger: included
Seatpost: IKUISTA Fluxi Cˣ Carbon, 0 mm offset, included
Seatpost clamp and frame accessories: included
Maximum tyre clearance: 35 mm
Bottom bracket interface: threaded
Cable routing: internal
Maximum chainring size: 55T single; 55–42T double
Frameset only. Wheels, tyres, drivetrain, brakes, saddle and cockpit are not included. Check component compatibility before building.
Geometry chart
Bike Geometry & Sizes
Measurement
XS
S
M
L
XL
A — Seat tube length
440 mm
470 mm
500 mm
520 mm
540 mm
B — Seat tube angle
74.5°
74.5°
74°
73.6°
73.3°
C — Head tube length
102 mm
108 mm
121 mm
141 mm
161 mm
D — Head tube angle
70.5°
71°
72°
72.5°
73°
E — Top tube length
515 mm
530 mm
540 mm
550 mm
565 mm
G — B.B. drop
70 mm
70 mm
70 mm
70 mm
70 mm
H — Chainstay length
412 mm
412 mm
412 mm
412 mm
412 mm
I — Fork offset
45 mm
45 mm
45 mm
45 mm
45 mm
J — Wheelbase
982 mm
993 mm
991 mm
992 mm
999 mm
K — Reach
375 mm
388 mm
389 mm
389 mm
394 mm
L — Stack
504 mm
511 mm
527 mm
548 mm
568 mm
Inseam
73–78 cm
76–82 cm
79–84 cm
82–87 cm
85–90 cm
Rider height
162–168 cm
167–173 cm
172–178 cm
177–185 cm
184–192 cm
Components geometry
Component Geometry
Measurement
XS
S
M
L
XL
Spacers (mm)
30mm
30mm
30mm
30mm
30mm
Stem length (mm)
80mm
90mm
100mm
110mm
110mm
Handlebar width (mm)
380mm
380mm
400mm
400mm
420mm
Crank length (mm)
165mm
170mm
170mm
172.5mm
172.5mm
Front chainring
–
–
–
–
–
Saddle height min (mm)
630mm
660mm
690mm
720mm
750mm
Saddle height max (mm)
690mm
720mm
750mm
780mm
810mm
Seatpost length (mm)
350mm
350mm
350mm
400mm
400mm
Product manuals
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I have to say, compared to my own old beater bike, this is a completely different ride.
— AamulehtiTomi Pyy, journalist, Aamulehti, First ride impression, July 2026
Fluxi Cˣ Frameset
Fluxi is IKUISTA’s all-round aero road platform, designed to balance speed, control and versatility. Aerodynamic tube shaping and balanced performance geometry suit fast training rides, racing and longer road days without the extremes of a dedicated aero race position.
The Cˣ – Cross carbon monocoque frame provides a responsive foundation for your own build. Internal routing, a threaded bottom bracket, UDH hanger and 35 mm tyre clearance support compatible component choices. The included IKUISTA Fluxi Cˣ carbon seatpost has 0 mm offset.
The frameset includes the frame, fork, front and rear axles, headset bearings, UDH hanger, seatpost, seatpost clamp and frame accessories. Wheels, tyres, drivetrain, brakes, saddle and cockpit are not included. Choose XS, S, M, L or XL in Glacier Teal or Nordic Alloy. Check geometry and component compatibility before choosing your build.
Fluxi Cˣ Frameset is IKUISTA's all-round road platform for fast road rides, racing and long days in the saddle. Build it with your own drivetrain, wheels and cockpit to match how you ride.
The Fluxi Cˣ carbon frame combines aerodynamic shaping with balanced road race geometry and full internal routing. The included carbon fork and Fluxi seatpost are matched to the frame, and the threaded bottom bracket and UDH hanger keep it compatible with standard parts.
Includes the Fluxi Cˣ carbon frame and fork, Fluxi carbon seatpost (0 mm offset) with clamp, front and rear axles, headset bearings, UDH hanger and frame accessories. Up to 35 mm tyres, threaded bottom bracket, internal routing, 55T single or 55–42T double chainrings. Sizes XS–XL. Wheels, tyres, drivetrain, brakes, saddle and cockpit are not included.
