Open the comparison tool

Specialized Allez geometryRoad · 2026 · 7 sizes, from 44 to 61

The Specialized Allez is a road bike available in 7 sizes, from 44 to 61. Stack ranges from 519 to 643 mm and reach from 356 to 392 mm. Its geometry is tall and short, built for comfort.

Stack519–643mm
Reach356–392mm
Head angle69.5–73.0°
Chainstay length420–425mm
Stable rearLow BBPlantedRelaxed

What size Allez 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 →
44S 519 · R 356
49S 536 · R 359
52S 552 · R 364
54S 569 · R 370
56S 590 · R 378
58S 610 · R 386
61S 643 · R 392

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.

Size44495254565861
Stack519536552569590610643
Reach356359364370378386392
Effective top tube493500530541556569586
Head tube length110125140155175195230
Head angle69.5°70.5°71.0°72.0°72.5°73.0°73.0°
Chainstay length420420425425425425425
Wheelbase9849849959981,0081,0171,033
Front centre576577583585594603619
BB drop77777776767575
BB height273273273274274276276
Fork length378378378378378378378
Fork offset47474747474747
Trail74716461585881
Standover715739761781801821852
Seat tube (method not stated)430460490510530550580
Seat angle (method not stated)75.3°75.3°73.3°73.3°73.3°73.3°73.3°

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

Spot a mistake in this data?

Thanks for letting us know. We’ll check it and fix it in the next update.

Specialized Allez 2026

It is sent from your own email. We don’t store any data.

Stack and reach of every size

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

330340350360370380390400410420480500520540560580600620640660680reach (mm) →↑ stack (mm)44495254565861

Character of each size

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

44
49
52
54
56
58
61
Positionracing → relaxed
Steeringcalm → quick
Pedallingrearward → forward
Bottom brackethigh → low
Wheelbaselively → planted
Rear endstable → agile

Bikes with similar geometry (size 54)

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

ModelΔ stackΔ reach
Specialized Roubaix SL8 · 522026−3 mm±0 mmCompare →
Specialized S-Works Roubaix SL8 · 522026−3 mm±0 mmCompare →
Bianchi Infinito · 5302026−3 mm+3 mmCompare →
Pinarello NEW PINARELLO X1 · 4952026−5 mm−1 mmCompare →
Pinarello NEW PINARELLO X3 · 4802026−5 mm−1 mmCompare →
Pinarello NEW PINARELLO X5 · 4802026−5 mm−1 mmCompare →

Frequently asked questions

What size Allez 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 519/356 mm in size 44 to 643/392 mm in size 61). 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 Allez in size 54?

Stack of 569 mm and reach of 370 mm, with an effective top tube of 541 mm and a head angle of 72.0°.

Is the Allez a racing or an endurance bike?

Endurance. In size 54 its stack-to-reach ratio is at percentile 87 of road bikes: a tall, short position.