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Specialized S-Works Stumpjumper geometryMTB · 2026 · 6 sizes, from S1 to S6

The Specialized S-Works Stumpjumper is a mtb bike available in 6 sizes, from S1 to S6. Stack ranges from 611 to 671 mm and reach from 400 to 525 mm. Its position sits between racing and endurance.

Stack611–671mm
Reach400–525mm
Head angle64.0–64.0°
Chainstay length430–445mm
Calm steeringPlantedSteep seat angleHigh BB

What size S-Works Stumpjumper 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 →
S1S 611 · R 400
S2S 621 · R 420
S3S 630 · R 445
S4S 644 · R 470
S5S 658 · R 495
S6S 671 · R 525

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

Geometry chart by size

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

SizeS1S2S3S4S5S6
Stack611621630644658671
Reach400420445470495525
Effective top tube542574596625649678
Head tube length95100110125140155
Head angle64.0°64.0°64.0°64.0°64.0°64.0°
Chainstay length430432435435445445
Wheelbase1,1531,1861,2171,2491,2901,327
Front centre724755785816848884
BB drop383535353535
BB height337340340340340340
Fork length561573573573573573
Fork offset444444444444
Trail133134134134134134
Standover738751745745745751
Seat tube (method not stated)385385405425445465
Seat angle (method not stated)77.7°76.5°76.5°76.0°76.0°76.0°

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

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Specialized S-Works Stumpjumper 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.

380400420440460480500520540580600620640660680700720reach (mm) →↑ stack (mm)S1S2S3S4S5S6

Character of each size

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

S1
S2
S3
S4
S5
S6
Positionracing → relaxed
Steeringcalm → quick
Pedallingrearward → forward
Bottom brackethigh → low
Wheelbaselively → planted
Rear endstable → agile

Bikes with similar geometry (size S3)

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

ModelΔ stackΔ reach
Specialized Stumpjumper · S32026±0 mm±0 mmCompare →
Cannondale Scalpel HT 110 · LG2023−1 mm−1 mmCompare →
Specialized Demo Race · S32026+2 mm+1 mmCompare →
Cannondale Trail · LG2025+2 mm+2 mmCompare →
Cube FRITZZ C:62 Super · M2026±0 mm+3 mmCompare →
Cube FRITZZ C:62 · M2026±0 mm+3 mmCompare →
S-Works Stumpjumper or Stumpjumper? In size S3 they have exactly the same stack and reach (630 / 445 mm): the difference is in the frame and build, not the position.

Frequently asked questions

What size S-Works Stumpjumper 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 611/400 mm in size S1 to 671/525 mm in size S6). 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 S-Works Stumpjumper in size S3?

Stack of 630 mm and reach of 445 mm, with an effective top tube of 596 mm and a head angle of 64.0°.

Is the S-Works Stumpjumper a racing or an endurance bike?

In between. In size S3 its stack-to-reach ratio is at percentile 65 of mtb bikes: neither very low nor very tall.

Does it have the same geometry as the Stumpjumper?

In size S3, yes: same stack and reach. If one already fits you, the same size of the other will put you in the same position.