The Fit AM 18 Inch Frame is a lightweight kids BMX frame with a pink rear half, purple front half, and "Fiend" in white on the lower tube—designed for park and freestyle geometry.

Highlights

Park and freestyle geometry
Half a pound lighter
18.5" top tube, 12.4" rear end
14mm 4Q Baked dropouts

Description

Fit build the AM 18 for the young riders who are already changing what a small bike can do. It runs park and freestyle oriented geometry, lighter tubing and an engraved head tube.

At 4 lbs (2.06 kg) it is half a pound lighter than Fit's last USA made 18 inch frame. If you are after a smaller trail rig instead, look at the Squib.

Features

Park and freestyle geometry. A 75° head tube angle, 71° seat tube angle and 10.5" bottom bracket height, built around park and freestyle riding.
Half a pound lighter. At 4 lbs (2.06 kg) the AM 18 is half a pound lighter than Fit's last USA made 18 inch frame.
18.5" top tube, 12.4" rear end. Sized for the little shredders, with an 8" standover height to match.
14mm 4Q Baked dropouts. Fit's own 4Q Baked dropouts, cut for a 14mm rear axle and paired with a mid bottom bracket.
Removable seat stay brake mounts. Run a brake or take the mounts off for a clean back end, with the M6 brake kit sold separately and no gyro tabs.

Specifications

Top tube: 18.5"
Chainstay: 12.4"
Head tube angle: 75°
Seat tube angle: 71°
Standover: 8"
Bottom bracket height: 10.5"
Bottom bracket: Mid
Dropouts: 14mm, 4Q Baked
Brake mounts: Removable seat stay, M6 brake kit sold separately. No gyro tabs
Head tube: Integrated
Seat clamp: Integrated
Wheel size: 18"
Weight: 4 lbs (2.06 kg)

Fit AM 18 Inch Frame

Name: Fit AM 18 Inch Frame
Brand: Fit Bike Co
SKU: FTFR018-02-PUP
Price: 1299.99 AUD
Availability: InStock

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

$1,299.99 AUD

Or 4 payments of $324.99 AUD with

Colour - Pink/Purple

Top Tube Length - 18.5

An 18 inch bike suits a rider of about 122 to 147cm, usually 7 to 11 years old, on an 18 to 18.5 inch top tube. It is the last step before a full size 20 inch.

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 your rider is near 147cm and still growing, look at a 20 inch instead: it is the size they will keep riding.

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.

Between an 18 and a 20? Take the 20. It is the size they will keep riding, and an 18 gets outgrown quickly.
They should be able to stand over the top tube with both feet flat on the ground.

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

Read the full buying guide