Specialized Allez Sprint geometryRoad · 2026 · 6 sizes, from 49 to 61

The Specialized Allez Sprint is a road bike available in 6 sizes, from 49 to 61. Stack ranges from 508 to 605 mm and reach from 378 to 411 mm. Its geometry is low and long, with a racing fit. All sizes share 410 mm chainstays.

Stack508–605mm

Reach378–411mm

Head angle71.8–74.0°

Chainstay length410mm

Lively

What size Allez Sprint 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.

Stack in mm Reach in mm Compare on Fitbikefy →

49S 508 · R 378

52S 520 · R 383

54S 537 · R 387

56S 558 · R 398

58S 584 · R 405

61S 605 · 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 Specialized. The ones that matter most for choosing a size are in bold.

Size	49	52	54	56	58	61
Stack	508	520	537	558	584	605
Reach	378	383	387	398	405	411
Effective top tube	509	532	541	563	578	596
Head tube length	105	115	133	153	180	200
Head angle	71.8°	72.5°	73.0°	73.5°	73.5°	74.0°
Chainstay length	410	410	410	410	410	410
Wheelbase	974	976	979	992	1,006	1,013
Front centre	575	578	580	592	607	614
BB drop	74	74	72	72	72	72
BB height	266	266	268	268	268	268
Fork length	366	366	366	366	366	366
Fork offset	47	47	44	44	44	44
Trail	63	58	58	55	55	52
Standover	735	755	765	795	815	835
Seat tube (method not stated)	470	495	510	530	550	570
Seat angle (method not stated)	75.5°	74.0°	74.0°	73.5°	73.5°	73.0°

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

Stack and reach of every size

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

Character of each size

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

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

Wilier Triestina Cento10 SL · M2024−1 mm±0 mmCompare →

Wilier Triestina Filante SLR · M2027+1 mm+1 mmCompare →

Wilier Triestina Wilier 0 SLR · M2024−1 mm−1 mmCompare →

Wilier Triestina Wilier 0 SL · M2024−1 mm−1 mmCompare →

Wilier Triestina Filante SL · M2026+1 mm+1 mmCompare →

Colnago Y1Rs · M2026+3 mm−1 mmCompare →

Frequently asked questions

What size Allez Sprint 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 508/378 mm in size 49 to 605/411 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 Sprint in size 54?

Stack of 537 mm and reach of 387 mm, with an effective top tube of 541 mm and a head angle of 73.0°.

Is the Allez Sprint a racing or an endurance bike?

Racing. In size 54 its stack-to-reach ratio is at percentile 22 of road bikes: a low, stretched position.