The Fit Bike Co STR 20 Inch Bike is shown in side view against a white background, featuring thick tires, a straight top tube, and no visible gears—ideal for modern street BMX riding.

The Fit Bike Co STR 20 Inch Bike features a green frame with black tires, pedals, and handlebars, displayed from the side against a white background—ideal for contemporary street BMX riding.

The Fit Bike Co STR 20 Inch Bike is a black street BMX with thick tires, straight handlebars, and a compact frame for modern street riding, shown against a white background.

Side view of a green Fit Bike Co STR 20 Inch Bike with black wheels, handlebars, and seat on a white background—built for modern street BMX riding.

A side view of the Fit Bike Co STR 20 Inch Bike—a black BMX with thick tires, straight handlebars, and a compact frame, designed for modern street riding.

Description

Every part of the 2026 STR is built for the street: frame, fork, components and even the paint. The geometry runs a short 12.6" rear end, a taller standover and a steeper head angle, and the fork has a tight 25mm offset with peg clearance cuts. Removable brake mounts and cable guides let you keep the lines clean.

It rolls on FIT's 2.4" F/U tyres with a double wall rear wheel, so you can drop the pressures for more grip and softer landings. Four-piece bars, flangeless CrossFIT grips and four metal pegs come fitted, and it is available in two top tube sizes and straightforward colourways.

Features

Built street first, front to back. Frame, fork, parts and paint on the 2026 STR are all put together with street riding in mind.
Short 12.6" rear end, steeper head angle. Tighter street geometry with a taller standover, dialled so the bike turns and spins where you want it.
Four metal pegs come stock. Four 100mm pegs and a fork cut for peg clearance mean you can grind straight out of the box.
2.4" tyres on a double wall rim. Run lower pressures for better grip and smoother landings without worrying about the rear wheel.
Removable brake mounts and cable guides. Strip it back for clean lines, or leave the U-brake and two finger lever on and keep the stopping power.

Specifications

Size: 20"
Frame: Cro-Mo front triangle, thread-on removable brake mounts
Chainstay: 12.6"
Fork: Cro-Mo steerer, tapered legs with peg cuts, 25mm offset, welded insert
Headset: Integrated with gyro holes
Stem: FIT top load
Bars: 4-piece, 9" x 29"
Grips: Flangeless CrossFIT
Brakes: Cable U-brake with low tension springs, linear cable
Brake lever: Two finger
Cranks: Tubular Cro-Mo 165mm
Bottom bracket: Sealed mid
Sprocket: FIT alloy Key 25T
Pedals: FIT PC
Front hub: Sealed
Rear hub: Sealed 9T cassette
Rims: FIT S1W front, double wall rear
Tyres: FIT F/U 2.4"
Seat: FIT Pivotal
Seat post: 200mm
Pegs: 4 x 100mm metal pegs
Note: Available in two top tube sizes

Assembly information

Your bike ships mostly assembled in the box. Finishing it takes most people 10 to 20 minutes with basic tools, and the video above walks through every step.

Fit the handlebars and line them up with the front wheel
Fit the front wheel, pedals and seat post
Check the brakes and tyre pressure before the first ride

Tools: Allen key set and a 15mm, 17mm or 19mm spanner for the pedals and axle nuts (bikes can vary between these three sizes). A socket is needed if installing pegs.

Rather have it done? Ask us about extra assembly before you order, or any local bike shop can finish the build for a small fee.

Fit Bike Co STR 20 Inch Bike

Name: Fit Bike Co STR 20 Inch Bike
Brand: Fit Bike Co
SKU: FTBK116-26-GRN
Price: 1099.99 AUD
Availability: InStock

Brand: Fit Bike Co SKU: Click to copy the SKU and show the pick location

$1,099.99 AUD

Or 4 payments of $274.99 AUD with

Colour - Army Green

Top Tube Length - 20.5

A 20 inch bike is the standard adult BMX and suits riders from about 147cm up. At this wheel size the top tube is what changes the fit, so pick that by height.

Rider height	Wheel size	Top tube
60 to 91cm	12"	12 to 12.5"
81 to 106cm	14"	14 to 14.5"
96 to 122cm	16"	16 to 16.5"
122 to 147cm	18"	18 to 18.5"
147 to 157cm	20"	19.75 to 20.25"
157 to 168cm	20"	20 to 20.5"
168 to 175cm	20"	20.25 to 20.75"
175 to 183cm	20"	20.5 to 21"
183 to 190cm and up	20"	20.75 to 21.5"
160cm and up	22"	21 to 22.25"
160cm and up	24"	21.75 to 22"
160cm and up	26"	22 to 23"

Sizes overlap on purpose, so personal preference comes into it. If you land in two bands, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park.

How to measure

Stand your rider against a wall in the shoes they ride in, heels flat, and mark the top of their head. Measure from the floor to the mark.

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the same as the length of the tube you can see.

A 20 inch bike is the standard adult BMX and most riders end up there, so do not size a tall child down to a smaller wheel.
22, 24 and 26 inch bikes are adult bikes with a bigger wheel, not bigger frames for taller riders.
Size up for stability through trails and transitions. Size down if you want the bike quick and twitchy for spins and grinds.
Top tube is fixed, but stem length, fork offset and bar position all shift how roomy the bike feels once you are on it.

Not sure? Send us their height and we will tell you what we would put them on.

Read the full buying guide