Official sizing guide for 2026
Firmstrong sizes its beach cruisers by wheel diameter rather than seat-tube length. Each adult model uses one 26" frame size with 3-4 inches of seatpost adjustment to fit riders 5'2" to 6'2"; tall riders or those wanting a more stretched-out chopper feel size up to the Urban Deluxe or Chief forward-pedal frames. Kids' Bruiser and Urban models step down to 16" and 20" wheels and are picked by the child's height, not their age.
| Size | Height Range | Inseam Range |
|---|---|---|
| 26" wheel | 5'2" - 6'2"(157 - 188 cm) | 28.7" - 34.6"(73 - 88 cm) |
| 26" wheel (Chief / Urban Deluxe - taller riders) | 5'5" - 6'4"(165 - 193 cm) | 29.9" - 35.4"(76 - 90 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| 16" wheel (Bruiser Boy) | 3'5" - 4'1"(105 - 125 cm) | 18.5" - 22.4"(47 - 57 cm) |
| 20" wheel (Urban Boy) | 4'0" - 5'2"(122 - 157 cm) | 22.0" - 28.3"(56 - 72 cm) |
Specific sizing recommendations for Firmstrong's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).

Firmstrong's flagship 26" beach cruiser with a 7-speed Shimano drivetrain for hills and headwinds the single-speed version can't handle. Steel cruiser frame, swept-back handlebars, oversized cushioned saddle. One frame size fits 5'5" to 6'2" via seatpost adjustment.

The single-speed version of the Bruiser - coaster brake, no shifters, nothing to maintain. Best for flat boardwalks, neighborhoods, and beach paths. Same 26" steel cruiser frame and upright geometry as the 7-speed; fits 5'5"-6'3" via seatpost.

Forward-pedal cruiser geometry: the bottom bracket is shifted forward of the seat tube so a tall rider can run a low saddle and still get full leg extension. Lets riders 5'5"-6'4" put both feet flat on the ground at stops while keeping a comfortable knee bend. Coaster brake, single-speed.

Aluminum-alloy version of the Urban cruiser - significantly lighter than the steel Bruiser, easier to lift onto a car rack or carry up apartment steps. 26" wheels, swept-back bars, single-speed with coaster brake. Fits 5'2"-5'11".

Chopper-style stretched cruiser - extended top tube and pulled-back bars give a laid-back, low-saddle riding position. Steel frame, single-speed, coaster brake. The longer wheelbase fits riders 5'2" to 6'4" and is forgiving for long-legged riders who feel cramped on standard cruisers.

Step-through women's cruiser - low standover lets riders in dresses or with limited mobility mount and dismount easily. 26" wheels, single-speed (3-speed available on some color SKUs), coaster brake, sprung saddle. Fits 5'2"-6'0".

Cruiser-styled kids bike scaled down to 20" wheels. Steel frame, single-speed, coaster brake - same upright geometry as the adult Urban so kids learn the same comfortable, feet-near-the-ground riding posture. Fits children 4'0" to 5'2" (roughly ages 6-9).

Smallest bike in Firmstrong's lineup - 16" steel cruiser with included training wheels for the transition from balance bike to pedal bike. Coaster brake, single-speed, swept-back bars at child height. Fits riders 3'5" to 4'1" (roughly ages 4-7).
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Helmets, saddles, lights and locks that fit any Firmstrong build.

Bell
S 52–56 cm, M 56–60 cm, L 60–64 cm

Avasta
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.

Cateye
2200 lm: highest output in CatEye lineup; for serious trail/night riding.

Abus
Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.

Camelbak
Standard 73mm bottle diameter. Optimized cage fit for most bike bottle cages.

Giro
S 51–55 cm, M 55–59 cm, L 59–63 cm
See why Firmstrong is a great fit for 5 Year Olds
6 Year Olds Sizing GuideSee why Firmstrong is a great fit for 6 Year Olds
7 Year Olds Sizing GuideSee why Firmstrong is a great fit for 7 Year Olds
Riders with Back Pain Sizing GuideSee why Firmstrong is a great fit for Riders with Back Pain
Senior Riders Sizing GuideSee why Firmstrong is a great fit for Senior Riders
Tall Riders Sizing GuideSee why Firmstrong is a great fit for Tall Riders
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