Mille GT, GTS or GTO?

All three are Assos’s S11 endurance bibs with rollBar bracing and a zeroPressure waist; the insert and fabric step up. Mille GT (list €160): 12 mm single-layer insert, QUARTZ fabric, ride intensity 3/5. Mille GTS (€250): twin-layer 13 mm (9 + 4) insert, Volkano fabric and what Assos calls its most streamlined Mille fit, 4/5. Mille GTO (€350): twin-layer 21 mm (11 + 10) insert that Assos calls the most comfortable endurance insert in the world, OSSIDIA fabric, cranKio Tec and an INject gripper, 4/5. Assos makes GTS and GTO in standard and long (+3 cm) legs; ours are Standard.

Standard or long leg — which version is this?

Assos makes the Mille GTS S11, Mille GTO S11 and Equipe RS Schtradivari S11 in two leg lengths: Standard and Long, which Assos makes 3 cm longer. Our Mille GTS and Mille GTO (“ST” in the title) are the Standard versions. For the Schtradivari we list both, Standard and Long, as separate products. The waist-based size chart is the same for both lengths.

What is Assos’s Endurance Series (Mille and Uma)?

Mille | Endurance (men) and Uma | Endurance (women) are what Assos describes as its complete series for long-distance riding: streamlined regularFit cuts, ultra-plush inserts and muscle-hugging, temperature-regulating fabrics. Our Mille GT, GTS, GTO and GTS Spring Fall, and the Uma GT, GTV and GT Half Shorts, are in it. Assos rates these bibs 4/5 or 5/5 for endurance; for racing, look at Equipe | Racing (men) and Dyora | Racing (women).

racingFit or regularFit — what’s the difference?

They’re Assos’s two main cuts. racingFit (Equipe and Dyora) is, in Assos’s fit guide, a close, performance-oriented fit with compressive fabrics for high-intensity riding — compared with regularFit it feels noticeably tighter by design. regularFit (Mille and Uma) is a balanced technical fit with moderately compressive fabrics: supportive without the tight feel of the Racing models. Assos uses the same size chart for both, so the difference is the feel, not the size.

Which Assos insert (chamois) is right, and how long a ride is it for?

Assos doesn’t give ride durations; it publishes each insert’s thickness and a 1–5 “ride intensity” rating. Race inserts are thin and firm: Equipe R / Dyora R S11 and Equipe RS S11 use a single 9 mm layer (intensity 4/5 and 5/5). Endurance inserts add cushioning: Mille GT / Uma GT S11 12 mm (3/5), Mille GTS S11 twin 9 + 4 mm (4/5), Mille GTO S11 twin 11 + 10 mm (4/5). Dyora RSV and Uma GTV use 9 mm with 4 mm ultraDistance pads under the sit bones. Thicker isn’t automatically better for long days: Assos builds the 9 + 4 mm RSV for ultra-endurance racing, for riders in an aggressive position.

How do Assos bib shorts fit, and which size should I pick?

Measure around the narrowest part of your waist, then factor in your height, with the fullest part of your hips as a third reference, and check Assos’s chart in the size guide. Assos cuts its bibs to mirror your body on the bike: it’s normal to feel the straps and fabric pull while standing, and the shorts “click” into place once you’re in the riding position.

ASSOS Mille GTS Bib Shorts S11 ST

Black Series

€250,00

~~€250,00~~ €250,00

Tax Included
EU Destination Selected (Spain)

+3 units in stock

The essentials

Best for

Long rides
Gran fondos
Hot weather

ASSOS Mille GTS Bib Shorts S11 ST - Black Series

Technologies

Rated by ASSOS

Endurance
Racing
Ride intensity
Breathability
Quick drying
Insulation

Specifications

Insert	GTS S11 · 9+4 mm
Series	Mille \| Endurance
Fit	GTS regularFit
Fabric	Volkano
Temperature	> +21 °C
Leg length	Standard (Assos also makes a Long, +3 cm)
Sizes	XS–XL

GTS S11 · 9+4 mm

Assos’s GTS S11 chamois (twin layer, 9 + 4 mm), with Shock-Absorb Damping System Twin, 3D Waffle, kraterCooler and whirlKrater.

Volkano

A proprietary fabric that is silky and compressive on the inside and abrasion-resistant on the outside, with UPF 50+ and a rich matte black. Mineral Tec in the yarns gives permanent odorControl.

GTS regularFit

Between a pure endurance fit and a second-skin racingFit: Assos calls it its most streamlined Mille silhouette, aerodynamic with long-distance comfort. Butterfly-wrap panels give micro-adjusted compression. Standard and long (+3 cm) legs. In Assos’s fit guide, regularFit is a balanced technical fit with moderately compressive fabrics: supportive without the tight feel of the Racing models.

rollBar

A patented bib-strap bracing adapted from Assos’s Racing Series. It stabilises the insert and locks it in place as your weight shifts when sprinting, climbing and cornering.

PILtec Plug-In

A light, very breathable textile band at the leg opening. The microdot silicone is invisible from outside but holds the leg in place, wet or dry.

zeroPressure Waist

A soft, very elastic waist construction for comfort and hold at the waist without pressure or pinching.

Shock-Absorb Damping System Twin (13 mm)

A dual-layer, 13 mm construction of fast-drying, high-density foams — 4 mm of targeted support on a 9 mm base. One layer absorbs shocks, the other damps micro-vibrations.

3D Waffle

A patented, three-layer perforated foam that adds breathability and removes excess weight (Assos).

kraterCooler

Perforations at the insert’s leading edge draw in cooling air to keep the microclimate dry and cool.

whirlKrater

Perforations spread across the insert create a swirl of cooling airflow instead of a one-way breeze.

ASSOS Mille GTS Bib Shorts S11 ST - Black Series

Compare with

	ASSOS Mille GTS Bib Shorts S11 ST - Black SeriesAssos’s long-distance endurance bib with an aero edge: the most streamlined Mille fit, sitting between a pure endurance cut and second-skin racingFit, for fast long rides and gran fondos in the heat.	ASSOS MILLE GT Bib Shorts S11 - Black Choose it for Assos’s everyday endurance bib: regularFit, QUARTZ fabric, rollBar and a 12 mm insert.	ASSOS Mille GTO Bib Shorts S11 ST - Black Series Choose it for the longest rides: twin-layer 11+10 mm GTO S11 insert and 5/5 breathability (Assos).	ASSOS Equipe R Bib Shorts S11 - Edge Green Choose it to race: second-skin racingFit and a 9 mm Equipe R S11 insert.
Regular price	€250,00	€160,00	€350,00	€200,00
Safety rating	—	—	—	—
Insert	GTS S11 · 9+4 mm	GT S11 · 12 mm	GTO S11 · 11+10 mm	Equipe R S11 · 9 mm
Series	Mille \| Endurance	Mille \| Endurance	Mille \| Endurance	Equipe \| Racing
Fit	GTS regularFit	regularFit	regularFit	racingFit
Fabric	Volkano	QUARTZ	OSSIDIA + LOSANGA	Type.911
Temperature	> +21 °C	> +21 °C	> +21 °C	> +21 °C
Endurance	5/5	4/5	5/5	3/5
Racing	3/5	2/5	3/5	4/5
Ride intensity	4/5	3/5	4/5	4/5
Breathability	5/5	4/5	5/5	5/5
Quick drying	5/5	5/5	5/5	5/5
Insulation	1/5	1/5	1/5	1/5
Leg length	Standard (Assos also makes a Long, +3 cm)	—	Standard (Assos also makes a Long, +3 cm)	—
Sizes	XS–XL	XS–3XL (range varies by colour)	XS–3XL	XS–XXL (range varies by colour)

ASSOS Mille GTS Bib Shorts S11 ST - Black Series

Size guide

Size	Waist (cm)	Waist (in)	Height (cm)	Height (in)	Hip (cm)	Hip (in)
XS	70–74	27.5–29.1	155–170	61.2–66.9	89–95	35–37.4
S	75–80	29.2–31.5	165–178	65–70	94–100	37.5–39.4
M	81–86	31.6–33.8	173–188	68.1–74	99–106	39–41.7
L	87–92	33.9–36.2	178–190	70–74.8	105–110	41.3–43.3
XL	93–99	36.3–39	181–195	71.3–76.7	109–116	42.9–45.6
2XL (XLG)	100–106	39.1–41.7	185+	72.8+	115–121	45.3–47.6
3XL (TIR)	107+	41.8+	185+	72.8+	120+	47.2+

Assos: measure the narrowest part of your waist, then factor in your height; use the fullest part of your hips as a third reference. Assos apparel is cut to mirror your body on the bike — it’s normal to feel bib straps and fabric pull while standing; in the riding position the garment clicks into place.

How to measure

Chest: around the fullest part, under the arms. Waist: around your natural waistline. Hips: around the fullest part. Keep the tape snug but not tight.

SIZESelect your size X-SMALL SMALL MEDIUM LARGE X-LARGE

Description

Assos’s long-distance endurance bib with an aero edge: the most streamlined Mille fit, sitting between a pure endurance cut and second-skin racingFit, for fast long rides and gran fondos in the heat. The S11 adds rollBar bracing, a less restrictive waist and a twin-layer 13 mm insert with far more cooling airflow, according to Assos. If you prefer a softer, more relaxed short, the Mille GT costs less; for maximum cushioning, the Mille GTO.