What size Marin bike should I get for 5'10" (178 cm)?

At 5'10" (178 cm) most riders fit a Medium Marin mountain bike (height range 168-180 cm, inseam 77-83 cm) like the Rift Zone 29 3 or Alpine Trail 8. On the Gestalt gravel bike, 5'10" lands on the 56 (178-186 cm). The Fairfax hybrid fits Medium (168-178 cm) or Large (176-188 cm) depending on torso length, and the Marin road range at 56 cm covers 176-185 cm. With a typical 82-84 cm inseam the Medium MTB and 56 road/gravel are the all-rounder picks; longer-legged riders can size up.

What size Marin Rift Zone 29 for 5'8" (173 cm)?

A 5'8" (173 cm) rider with a 77-79 cm inseam fits a Medium Marin Rift Zone 29 3 (height range 168-180 cm, stack 615 mm, reach 458 mm). The Rift Zone's progressive geometry with modern reach numbers means riders coming from older trail bikes often prefer the smaller of two adjacent sizes - the Medium is the right call at 5'8". The Alpine Trail 8 enduro equivalent at Medium has 13 mm more stack (628 mm) and 17 mm more reach (475 mm), so riders wanting more descending stability at the same height should consider the Alpine Trail rather than sizing up the Rift Zone.

Is Marin sizing the same as Kona or Trek mountain bikes?

Close, with small reach differences. A Marin Rift Zone Medium (stack 615 mm, reach 458 mm) is within 5 mm of a Kona Process Medium (~620/460) and a Trek Fuel EX Medium (618/460). The Alpine Trail Large (628/475) sits between the Trek Slash and the Santa Cruz Bronson on reach. Marin's MultiTrac suspension and progressive geometry deliver a similar ride feel to Kona's all-mountain bikes, so cross-shopping between the two brands is straightforward - use stack and reach in millimeters as the tiebreaker rather than the letter label.

Are Marin bikes true to size?

Yes. Marin's progressive geometry scales proportionally across XS to XL, so the published height ranges fit reliably. The Rift Zone trail bike between sizes leans toward the smaller frame for snappier handling; the Alpine Trail enduro bike leans larger for descending confidence and reach. The Gestalt gravel bike fits true to its 50-58 numeric chart and should be sized the same as your road bike. The Fairfax hybrid fits true to height alone - most recreational riders don't need to deviate from the chart recommendation.

Why does Marin use numeric sizing on gravel and road but letters on mountain bikes?

Marin's gravel (Gestalt) and road bikes use 49-58 numeric labels because drop-bar fit is driven by saddle-to-bar reach in millimeters, where finer increments help. Mountain bikes (Rift Zone, Alpine Trail) use S/M/L/XL because trail riders prioritize standover and reach - dropper posts handle saddle height. Kids bikes use wheel size (12", 16", 20", 24"). The three systems aren't interchangeable: a 56 Gestalt and a Medium Rift Zone don't share geometry. Use the height/inseam chart for the specific category you're shopping in.

Marin Bike Size Chart

Size chart and fit guide for 2026

United StatesFounded 1986Official Website

Born in the birthplace of mountain biking, Marin designs bikes with a focus on versatile trail performance and rider confidence. Their MultiTrac suspension and progressive geometry ensure consistent handling across all frame sizes, with reach and stack numbers that scale proportionally to deliver the same ride feel from XS to XL.

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Marin Size Charts by Category

Marin Mountain Bike Size Chart

Size	Height Range	Inseam Range
S	5'2" - 5'7"(157 - 170 cm)	28.3" - 30.7"(72 - 78 cm)
M	5'6" - 5'11"(168 - 180 cm)	30.3" - 32.7"(77 - 83 cm)
L	5'10" - 6'3"(178 - 190 cm)	32.3" - 34.6"(82 - 88 cm)
XL	6'2" - 6'7"(188 - 200 cm)	34.3" - 37.0"(87 - 94 cm)

Height: 5'2" – 5'7" (157–170 cm)

Inseam: 28.3" – 30.7" (72–78 cm)

Height: 5'6" – 5'11" (168–180 cm)

Inseam: 30.3" – 32.7" (77–83 cm)

Height: 5'10" – 6'3" (178–190 cm)

Inseam: 32.3" – 34.6" (82–88 cm)

Height: 6'2" – 6'7" (188–200 cm)

Inseam: 34.3" – 37.0" (87–94 cm)

Marin Gravel Bike Size Chart

Size	Height Range	Inseam Range
50	5'3" - 5'6"(160 - 168 cm)	29.1" - 30.7"(74 - 78 cm)
52	5'5" - 5'8"(166 - 173 cm)	30.3" - 31.9"(77 - 81 cm)
54	5'7" - 5'11"(171 - 180 cm)	31.5" - 33.1"(80 - 84 cm)
56	5'10" - 6'1"(178 - 186 cm)	32.7" - 34.3"(83 - 87 cm)
58	6'0" - 6'5"(184 - 196 cm)	33.9" - 36.2"(86 - 92 cm)

Height: 5'3" – 5'6" (160–168 cm)

Inseam: 29.1" – 30.7" (74–78 cm)

Height: 5'5" – 5'8" (166–173 cm)

Inseam: 30.3" – 31.9" (77–81 cm)

Height: 5'7" – 5'11" (171–180 cm)

Inseam: 31.5" – 33.1" (80–84 cm)

Height: 5'10" – 6'1" (178–186 cm)

Inseam: 32.7" – 34.3" (83–87 cm)

Height: 6'0" – 6'5" (184–196 cm)

Inseam: 33.9" – 36.2" (86–92 cm)

Marin Hybrid Bike Size Chart

Size	Height Range	Inseam Range
XS	4'12" - 5'4"(152 - 163 cm)	27.2" - 29.5"(69 - 75 cm)
S	5'3" - 5'7"(161 - 170 cm)	29.1" - 31.1"(74 - 79 cm)
M	5'6" - 5'10"(168 - 178 cm)	30.7" - 32.7"(78 - 83 cm)
L	5'9" - 6'2"(176 - 188 cm)	32.3" - 34.6"(82 - 88 cm)
XL	6'1" - 6'6"(186 - 198 cm)	34.3" - 36.6"(87 - 93 cm)

Height: 4'12" – 5'4" (152–163 cm)

Inseam: 27.2" – 29.5" (69–75 cm)

Height: 5'3" – 5'7" (161–170 cm)

Inseam: 29.1" – 31.1" (74–79 cm)

Height: 5'6" – 5'10" (168–178 cm)

Inseam: 30.7" – 32.7" (78–83 cm)

Height: 5'9" – 6'2" (176–188 cm)

Inseam: 32.3" – 34.6" (82–88 cm)

Height: 6'1" – 6'6" (186–198 cm)

Inseam: 34.3" – 36.6" (87–93 cm)

Marin Road Bike Size Chart

Size	Height Range	Inseam Range
49	5'1" - 5'5"(155 - 165 cm)	27.6" - 29.9"(70 - 76 cm)
52	5'4" - 5'8"(163 - 173 cm)	29.5" - 31.5"(75 - 80 cm)
54	5'7" - 5'10"(170 - 178 cm)	31.1" - 32.7"(79 - 83 cm)
56	5'9" - 6'1"(176 - 185 cm)	32.3" - 34.3"(82 - 87 cm)
58	6'0" - 6'4"(183 - 193 cm)	33.9" - 36.2"(86 - 92 cm)

Height: 5'1" – 5'5" (155–165 cm)

Inseam: 27.6" – 29.9" (70–76 cm)

Height: 5'4" – 5'8" (163–173 cm)

Inseam: 29.5" – 31.5" (75–80 cm)

Height: 5'7" – 5'10" (170–178 cm)

Inseam: 31.1" – 32.7" (79–83 cm)

Height: 5'9" – 6'1" (176–185 cm)

Inseam: 32.3" – 34.3" (82–87 cm)

Height: 6'0" – 6'4" (183–193 cm)

Inseam: 33.9" – 36.2" (86–92 cm)

Marin Kids Bike Size Chart

Size	Height Range	Inseam Range
12"	2'8" - 3'3"(82 - 100 cm)	11.8" - 15.7"(30 - 40 cm)
16"	3'1" - 3'9"(95 - 115 cm)	14.6" - 18.1"(37 - 46 cm)
20"	3'7" - 4'3"(110 - 130 cm)	17.7" - 21.7"(45 - 55 cm)
24"	3'11" - 4'9"(120 - 145 cm)	19.7" - 24.8"(50 - 63 cm)

12"

Height: 2'8" – 3'3" (82–100 cm)

Inseam: 11.8" – 15.7" (30–40 cm)

16"

Height: 3'1" – 3'9" (95–115 cm)

Inseam: 14.6" – 18.1" (37–46 cm)

20"

Height: 3'7" – 4'3" (110–130 cm)

Inseam: 17.7" – 21.7" (45–55 cm)

24"

Height: 3'11" – 4'9" (120–145 cm)

Inseam: 19.7" – 24.8" (50–63 cm)

Popular Marin Models & Sizing Notes

Specific sizing recommendations for Marin's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).

Marin Rift Zone 29 3

🚵 Mountain Bike • 2025

$3,200 - $4,500

Trail bike with 130mm MultiTrac suspension and 29-inch wheels. Progressive geometry with modern reach numbers-riders transitioning from older bikes may find they prefer a smaller size in the Rift Zone.

Stack: 615mmReach: 458mm

Marin Alpine Trail 8

🚵 Mountain Bike • 2025

$4,000 - $5,500

Long-travel enduro bike with 160mm rear and 170mm front travel. Aggressive geometry built for descending-riders should consider reach over standover height when selecting frame size.

Stack: 628mmReach: 475mm

Marin Gestalt X11

🏔️ Gravel Bike • 2025

$2,500 - $3,500

Adventure gravel bike with clearance for 45mm tires and multiple mount points for bikepacking. Endurance-oriented geometry with comfortable reach-size as you would for a road bike.

Stack: 578mmReach: 380mm

Marin Fairfax 2

🚲 Hybrid Bike • 2025

$700 - $900

Urban fitness hybrid with flat bars and lightweight aluminum frame. Upright position ideal for commuting and fitness riding-most riders fit true to the height chart.

Stack: 600mmReach: 390mm

Marin Sizing Tips

How to Measure

• Height: Stand barefoot against a wall and measure from floor to top of head
• Inseam: Stand with feet 6 inches apart, measure from floor to crotch
• Arm Reach: For road bikes, measure from shoulder to fingertips

When Between Sizes

• Comfort priority: Choose the larger size
• Performance priority: Choose the smaller size
• Long torso: Size up for better reach
• Long legs: Size down for better standover

Marin Sizing FAQ

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Solve discomfort with proper saddle selection and positioning

Where to go from your Marin sizing

Turn your measurements into a confident buy.

Calculate your frame sizePunch in your height and inseam to get a size estimate in under a minute.Compare two bikesPut geometry and fit side by side before you commit to one.Find gear for your MarinBrowse helmets, saddles, lights, and locks sized for your setup.

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