Official sizing guide for 2026
Trek uses a combination of traditional frame sizing with their Alpha Fit system, focusing on stack and reach measurements to help riders find the optimal position. They offer a wide range of frame sizes and geometries to accommodate different body types and riding styles.
| Size | Height Range | Inseam Range |
|---|---|---|
| 47 | 4'12" - 5'3"(152 - 160 cm) | 27.2" - 28.7"(69 - 73 cm) |
| 50 | 5'2" - 5'5"(158 - 165 cm) | 28.3" - 29.9"(72 - 76 cm) |
| 52 | 5'4" - 5'7"(163 - 170 cm) | 29.5" - 31.1"(75 - 79 cm) |
| 54 | 5'6" - 5'9"(168 - 175 cm) | 30.7" - 32.3"(78 - 82 cm) |
| 56 | 5'8" - 5'11"(173 - 180 cm) | 31.9" - 33.5"(81 - 85 cm) |
| 58 | 5'10" - 6'1"(178 - 185 cm) | 33.1" - 34.6"(84 - 88 cm) |
| 60 | 6'0" - 6'3"(183 - 191 cm) | 34.3" - 36.2"(87 - 92 cm) |
| 62 | 6'2" - 6'6"(188 - 198 cm) | 35.4" - 37.4"(90 - 95 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 4'10" - 5'1"(147 - 155 cm) | 26.0" - 28.0"(66 - 71 cm) |
| S | 5'0" - 5'5"(153 - 165 cm) | 27.2" - 29.9"(69 - 76 cm) |
| M | 5'4" - 5'9"(163 - 175 cm) | 29.5" - 31.9"(75 - 81 cm) |
| M/L | 5'8" - 6'0"(173 - 183 cm) | 31.1" - 33.1"(79 - 84 cm) |
| L | 5'10" - 6'2"(178 - 188 cm) | 32.3" - 34.3"(82 - 87 cm) |
| XL | 6'1" - 6'5"(185 - 196 cm) | 33.9" - 36.2"(86 - 92 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 4'10" - 5'1"(147 - 155 cm) | 26.0" - 28.0"(66 - 71 cm) |
| S | 5'0" - 5'5"(153 - 165 cm) | 27.2" - 29.9"(69 - 76 cm) |
| M | 5'4" - 5'9"(163 - 175 cm) | 29.5" - 31.9"(75 - 81 cm) |
| L | 5'8" - 6'1"(173 - 185 cm) | 31.1" - 33.9"(79 - 86 cm) |
| XL | 6'0" - 6'5"(183 - 196 cm) | 33.5" - 36.2"(85 - 92 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| 49 | 5'1" - 5'4"(155 - 163 cm) | 28.0" - 29.5"(71 - 75 cm) |
| 52 | 5'3" - 5'6"(160 - 168 cm) | 29.1" - 30.7"(74 - 78 cm) |
| 54 | 5'5" - 5'8"(165 - 173 cm) | 30.3" - 31.9"(77 - 81 cm) |
| 56 | 5'7" - 5'11"(170 - 180 cm) | 31.5" - 33.1"(80 - 84 cm) |
| 58 | 5'10" - 6'1"(178 - 186 cm) | 32.7" - 34.3"(83 - 87 cm) |
| 61 | 6'0" - 6'5"(183 - 196 cm) | 33.9" - 36.2"(86 - 92 cm) |
Specific sizing recommendations for Trek's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).
Endurance geometry with taller stack height. Riders seeking comfort may prefer sizing up if between sizes.
Lightweight climbing bike with more aggressive fit. Consider sizing down for a racier position.
Trail bike with 140mm travel. Modern long-low-slack geometry means many riders size down from previous Trek MTBs.
Versatile gravel bike with stable geometry. IsoSpeed decoupler adds comfort without affecting fit.
Flat-bar fitness bike with upright position. Most riders fit true to size based on height charts.
Use our free calculators to determine your ideal Trek frame size based on your measurements.
See why Trek is great for riders with back pain
Beginners Sizing GuideSee why Trek is great for beginners
Commuters Sizing GuideSee why Trek is great for commuters
Heavy Riders Sizing GuideSee why Trek is great for heavy riders
Long Torso Riders Sizing GuideSee why Trek is great for long torso riders
Competitive Cyclists Sizing GuideSee why Trek is great for competitive cyclists
Senior Riders Sizing GuideSee why Trek is great for senior riders
Short Riders Sizing GuideSee why Trek is great for short riders
Tall Riders Sizing GuideSee why Trek is great for tall riders
Women Cyclists Sizing GuideSee why Trek is great for women cyclists
Compare sizing across different bike manufacturers to find your perfect fit.