GT Bike Size Chart
Size chart and fit guide for 2026
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GT's iconic Triple Triangle frame design isn't just visual-it provides additional rear-end stiffness and compliance that influences how each size rides, giving their bikes a distinct feel under power. With roots in BMX and decades of gravity racing heritage, GT sizes their bikes to encourage an active, centered riding position that rewards riders who like to push their limits on varied terrain. Note: GT paused new product releases in late 2024 and has been selling through existing inventory since, so the models below are the last released generation rather than a refreshed annual line-up. Warranty and service are handled by Cycling Sports Group.
GT Size Charts by Category
GT Mountain Bike Size Chart
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 4'12" - 5'4"(152 - 162 cm) | 26.4" - 28.7"(67 - 73 cm) |
S | 5'3" - 5'7"(160 - 170 cm) | 28.3" - 30.7"(72 - 78 cm) |
M | 5'6" - 5'10"(168 - 178 cm) | 30.3" - 32.7"(77 - 83 cm) |
L | 5'9" - 6'2"(176 - 188 cm) | 32.3" - 35.0"(82 - 89 cm) |
XL | 6'1" - 6'6"(186 - 198 cm) | 34.6" - 37.4"(88 - 95 cm) |
GT Gravel Bike Size Chart
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 5'1" - 5'5"(155 - 164 cm) | 27.2" - 29.5"(69 - 75 cm) |
S | 5'4" - 5'8"(162 - 172 cm) | 29.1" - 31.1"(74 - 79 cm) |
M | 5'7" - 5'11"(170 - 180 cm) | 30.7" - 33.1"(78 - 84 cm) |
L | 5'10" - 6'2"(178 - 189 cm) | 32.7" - 35.0"(83 - 89 cm) |
XL | 6'2" - 6'6"(187 - 198 cm) | 34.6" - 37.4"(88 - 95 cm) |
GT Hybrid Bike Size Chart
| Size | Height Range | Inseam Range |
|---|---|---|
XS | 5'0" - 5'4"(153 - 163 cm) | 26.8" - 29.1"(68 - 74 cm) |
S | 5'3" - 5'8"(161 - 172 cm) | 28.7" - 31.1"(73 - 79 cm) |
M | 5'7" - 5'11"(170 - 181 cm) | 30.7" - 33.1"(78 - 84 cm) |
L | 5'10" - 6'3"(179 - 190 cm) | 32.7" - 35.4"(83 - 90 cm) |
XL | 6'2" - 6'7"(188 - 200 cm) | 35.0" - 37.8"(89 - 96 cm) |
Popular GT Models & Sizing Notes
Specific sizing recommendations for GT's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).
GT Sensor
🚵 Mountain Bike • 2025Trail bike with 130mm of rear travel and the Triple Triangle frame. Balanced geometry works well for all-around trail riding-the seatstay design adds compliance, so most riders fit comfortably at their recommended size.
GT Force
🚵 Mountain Bike • 2025Enduro bike with 160mm front and 150mm rear travel. Aggressive geometry with a slack 63.5-degree head angle-riders who split time between bike parks and natural trails should size based on reach for descending control.
GT Zaskar
🚵 Mountain Bike • 2025Legendary XC hardtail with Triple Triangle heritage dating back to 1991. Modern geometry updates bring longer reach and slacker head angles while maintaining the efficient climbing DNA-size for your preferred reach to the bars.
GT Aggressor
🚵 Mountain Bike • 2025Entry-level hardtail designed for riders new to mountain biking. Relaxed geometry and moderate reach make it forgiving for beginners-sizing is straightforward based on height, with no need to account for aggressive riding position.
GT Grade
🏔️ Gravel Bike • 2025Gravel bike featuring GT's Triple Triangle design adapted for drop-bar use. The unique seatstay junction adds vertical compliance for rough surfaces-riders transitioning from road bikes should note the slightly longer reach compared to typical endurance road geometry.
GT Sizing Tips
How to Measure
- • Height: Stand barefoot against a wall and measure from floor to top of head
- • Inseam: Stand barefoot with feet 6 inches apart, press a level book firmly upward, and measure from the floor to its top edge
- • 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
GT Sizing FAQ
Accessories for GT bikes
Helmets, saddles, lights and locks that fit any GT build.
Bell
Bell Nomad 2 MIPS
This ASIN is Small/Medium 52-57 cm. Check the selected Amazon size/color before checkout.
Avasta
AVASTA Kids Bicycle Saddle
Standard saddle rail spacing fits most kids' seatpost clamps. Designed primarily for 12-20" wheel kids' bikes; larger riders may prefer a wider adult saddle.
Bell
Bell Lumina 300 Headlight
Tool-free handlebar mount; check bar space around computers, bells, and baskets.
Abus
ABUS Granit X-Plus 540
Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.
Bivo
Bivo Duo 25 oz Stainless Bottle
Fits most major cages, but the 77 mm maximum diameter is a touch larger than a standard plastic bottle. Check tight side-load cages on very small frames.
Giro
Giro Register MIPS
S 51-55 cm, M 55-59 cm, L 59-63 cm
GT Comparisons & Guides
Find Your GT Size
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