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Ridley Invenio Grifn A geometryRoad · 2026 · 6 sizes, from XXS to XL

The Ridley Invenio Grifn A is a road bike available in 6 sizes, from XXS to XL. Stack ranges from 515 to 622 mm and reach from 372 to 414 mm. Its position sits between racing and endurance. All sizes share 420 mm chainstays.

Stack515–622mm
Reach372–414mm
Head angle71.5–72.0°
Chainstay length420mm
Stable rear

What size Invenio Grifn A 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 →
XXSS 515 · R 372
XSS 530 · R 379
SS 553 · R 386
MS 577 · R 394
LS 603 · R 406
XLS 622 · R 414

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.

SizeXXSXSSMLXL
Stack515530553577603622
Reach372379386394406414
Effective top tube515525545565585605
Head tube length90105130155182205
Head angle71.5°71.5°72.0°72.0°72.0°72.0°
Chainstay length420420420420420420
Wheelbase9829931,0051,0211,0431,057
BB drop757573737171
Standover760775800824852871
Seat tube (method not stated)450480505530555580
Seat angle (method not stated)74.5°74.5°74.0°74.0°74.0°73.5°

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

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Ridley Invenio Grifn A 2026

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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.

350360370380390400410420430440480500520540560580600620640660reach (mm) →↑ stack (mm)XXSXSSMLXL

Character of each size

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

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

Bikes with similar geometry (size S)

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

ModelΔ stackΔ reach
Ridley Grifn A Road · S2024±0 mm±0 mmCompare →
Orbea Orca · 532027−1 mm−1 mmCompare →
Pinarello Dogma F12 · 5402019−2 mm−1 mmCompare →
Pinarello DOGMA F 1 OF A KIND · 5102026−2 mm−1 mmCompare →
Pinarello DOGMA F EDIZIONE SPECIALE · 5102026−2 mm−1 mmCompare →
Pinarello Dogma F · 5102026−2 mm−1 mmCompare →
Invenio Grifn A or Grifn A Road? In size S they have exactly the same stack and reach (553 / 386 mm): the difference is in the frame and build, not the position.

Frequently asked questions

What size Invenio Grifn A 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 515/372 mm in size XXS to 622/414 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 Invenio Grifn A in size S?

Stack of 553 mm and reach of 386 mm, with an effective top tube of 545 mm and a head angle of 72.0°.

Is the Invenio Grifn A a racing or an endurance bike?

In between. In size S its stack-to-reach ratio is at percentile 45 of road bikes: neither very low nor very tall.

Does it have the same geometry as the Grifn A Road?

In size S, yes: same stack and reach. If one already fits you, the same size of the other will put you in the same position.