Specialized Tarmac SL8 Expert Shimano Ultegra Di2

Name: Specialized Tarmac SL8 Expert Shimano Ultegra Di2
Brand: Specialized

2026 RoadRace Manufacturer page

Specialized Tarmac SL8 Expert Shimano Ultegra Di2, color Gloss Obsidian Metallic / 25% Cqv Reflex Super Red Pearl over White

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–30t
Gear range: 394%
Weight: 7.18 kg 15.8 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

44cm
49cm
52cm
54cm
56cm
58cm
61cm

The manufacturer did not publish rider heights for these sizes.

Components

13 of 17 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc Not identified

Suspension

1 part

Fork

FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc Not identified

Drivetrain

7 parts

Brakes

1 part

Brakes
- Shimano Ultegra

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- Specialized
Headset
- Roval
Saddle

Body Geometry Power Expert Not identified
Seatpost
- S-Works
Stem

Tarmac integrated stem, 6-degree Not identified

Sizes and geometry

7 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 54cm

Table

Reach 384mm

Stack 544mm

Wheelbase 978mm

Head angle 73.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 7 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	366	375	380	384	395	402	408
Stackmm	501	514	527	544	565	591	612
Top tube lengthmm	496	509	531	541	563	577	595
Seat tube lengthmm	433	445	456	473	494	515	545
Head tube lengthmm	99	109	120	137	157	184	204
Head tube angle	70.5°	71.75°	72.5°	73°	73.5°	73.5°	74°
Seat tube angle	75.5°	75.5°	74°	74°	73.5°	73.5°	73°
Chainstay lengthmm	410	410	410	410	410	410	410
Wheelbasemm	970	973	975	978	991	1006	1013
Front centermm	572	574	577	579	592	606	613
Bottom bracket dropmm	74	74	74	72	72	72	72
Bottom bracket heightmm	266	266	266	268	268	268	268
Standover heightmm	723	735	746	768	786	808	834
Fork rakemm	47	47	47	44	44	44	44
Trailmm	71	63	58	58	55	55	52
Stack/reach ratio	1.37	1.37	1.39	1.42	1.43	1.47	1.50
Suspension and parts
Crank lengthmm	165	165	170	172.5	172.5	175	175
Handlebar widthmm	360	380	400	420	420	440	440
Stem lengthmm	70	80	90	100	100	110	110
Seatpost lengthmm	300	300	300	380	380	380	380

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon
Bicycle weight: 7.18 kg

15.8 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 30
Lowest gear: 34.8 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 32c
Tire width: 26c
Wheel material: Carbon
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

34.8 gear inches

This value is above the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 719 bicycles with this information
Coverage: 78.6% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 719 bicycles with this information
Coverage: 78.6% of the class

Shifting

Electronic

631 of 912 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2026
Sample: 912 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 13.3 km/h
Highest gear: 52.5 km/h

Total gear range 394%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 34.8–137.1 gear inches
Class reference (p10–p90): 27.4–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2026
Lowest gear: 719 bicycles with this information, 78.6% of the class
Highest gear: 719 bicycles with this information, 78.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Specialized Tarmac SL8 Expert Shimano Ultegra Di2	Specialized S-Works Tarmac SL8 LTD – Demi Dreaming	Specialized S-Works Tarmac SL8 LTD - Bull TdF Red	Specialized S-Works Tarmac SL8 Shimano Dura-Ace Di2	Specialized S-Works Tarmac SL8 SRAM Red AXS	Specialized Tarmac SL7 Sport Shimano 105
Frame
Bicycle weight	7.18 kg	Not informed	6.6 kg	6.67 kg	6.62 kg	8.27 kg
Frame weight	Not informed	0.69 kg	Not informed	Not informed	Not informed	Not informed
Drivetrain
Front chainrings	2	Not informed	2	2	2	2
Smallest chainring	36	Not informed	35	36	35	34
Largest chainring	52	Not informed	48	52	48	50
Rear sprockets	12	Not informed	12	12	12	12
Smallest sprocket	11	Not informed	10	11	10	11
Largest sprocket	30	Not informed	33	30	33	34
Lowest gear	34.8 in	Not informed	30.8 in	34.8 in	30.8 in	29.0 in
Highest gear	137.1 in	Not informed	139.2 in	137.1 in	139.2 in	131.8 in
Cockpit
Shifting	Electronic	Mechanical	Electronic	Electronic	Electronic	Mechanical
Other specifications
Tire clearance	Maximum tire width: 32c	Not informed	Not informed	Maximum tire width: 32c	Maximum tire width: 32c	Not informed
Tire width	26c	Not informed	28c	28c	28c	26c
Wheel material	Carbon	Not informed	Carbon	Carbon	Carbon	Aluminum
Power meter	Not informed	Not informed	SRAM RED AXS Power Meter, 48/35tAdditional specification: Model display: Red AXSAdditional specification: Model id: red-axs	Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter, 52/36tAdditional specification: Model display: Precision ProAdditional specification: Model id: precision-pro	SRAM RED E1 with Quarq Power Meter 48/35tAdditional specification: Model display: Red AXSAdditional specification: Model id: red-axs	Not informed