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Ridley Falcn geometryRoad · 2027 · 5 sizes, from XS to XL

The Ridley Falcn is a road bike available in 5 sizes, from XS to XL. Stack ranges from 513 to 599 mm and reach from 378 to 411 mm. Its geometry is low and long, with a racing fit. All sizes share 407 mm chainstays. Data from 2027; geometry from 2026, 2024 is also available.

Stack513–599mm
Reach378–411mm
Head angle72.0–74.0°
Chainstay length407mm
Quick steeringLivelyAgile rearSlack seat angle

What size Falcn do I need?

Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.

Compare on Fitbikefy →
XSS 513 · R 378
SS 530 · R 388
MS 551 · R 397
LS 573 · R 404
XLS 599 · R 411

Enter your stack and reach to see which size fits you best.

Geometry chart by size

Measurements in mm and degrees, as published by Ridley. The ones that matter most for choosing a size are in bold.

SizeXSSMLXL
Stack513530551573599
Reach378388397404411
Effective top tube525545565585600
Head tube length115130150175200
Head angle72.0°73.0°73.5°73.5°74.0°
Chainstay length407407407407407
Wheelbase9749779871,0021,012
BB drop7570706868
Seat tube (method not stated)455480499530555
Seat angle (method not stated)74.0°73.5°73.0°72.5°72.5°

Source: Ridley official website · data from 11 Nov 2026.

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Ridley Falcn 2027

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Stack and reach of every size

Higher means a taller front end; further right means a longer reach. The blue dot is your search.

350360370380390400410420430440480500520540560580600620640reach (mm) →↑ stack (mm)XSSMLXL

Character of each size

Compared with other road bikes. Further right means more of that quality.

XS
S
M
L
XL
Positionracing → relaxed
Steeringcalm → quick
Pedallingrearward → forward
Bottom brackethigh → low
Wheelbaselively → planted
Rear endstable → agile

Bikes with similar geometry (size M)

The closest size of other road models, by stack and reach.

ModelΔ stackΔ reach
Bianchi Specialissima · 5702027+1 mm±0 mmCompare →
Megamo Raise · L2027−1 mm−1 mmCompare →
Ridley Noah 3.0 · S2027−2 mm+6 mmCompare →
Wilier Triestina Wilier 0 SLR · L2024+3 mm−6 mmCompare →
Wilier Triestina Wilier 0 SL · L2024+3 mm−6 mmCompare →
Wilier Triestina Cento10 SL · L2024+3 mm−6 mmCompare →

Frequently asked questions

What size Falcn do I need?

It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 513/378 mm in size XS to 599/411 mm in size XL). The size finder on this page shows the closest size and the stem and spacers you would need.

What are the stack and reach of the Falcn in size M?

Stack of 551 mm and reach of 397 mm, with an effective top tube of 565 mm and a head angle of 73.5°.

Is the Falcn a racing or an endurance bike?

Racing. In size M its stack-to-reach ratio is at percentile 22 of road bikes: a low, stretched position.