Forgotten Thrasher 20 Inch Bike / Smoke Grey / 19.8TT
Forgotten Thrasher 20 Inch Bike / Gloss Neon Green / 19.8TT
Forgotten Thrasher 20 Inch Bike / Gloss Neon Orange / 19.8TT
Forgotten Thrasher 20 Inch Bike / Gloss Neon Pink / 19.8TT

Description

The Thrasher model bike is Forgotten's entry level model BMX bike. A perfect bike for any beginner. The Forgotten Thrasher is a dream ride for a great price.

Features
  • Beginner spec, done properly. The Thrasher is the entry level bike in the Forgotten range, put together for a youngster starting out.
  • Shorter 19.8" top tube. A 19.8" top tube and 8.75" bars keep the bike small enough for a younger rider to throw around.
  • Gussets for extra frame strength. Top and down tube gussets add strength up front, for the knocks that come with learning.
  • Sealed bearings where it counts. A fully sealed 19mm mid bottom bracket, fully sealed front hub and sealed bearing rear cassette hub keep the grit out.
  • 3-piece cranks, 25T to 9T. Three piece cranks with a KMC 510H chain, 36 hole alloy rims and 2.30" Innova tyres front and rear.

Specifications
  • Size: 20" wheels
  • Frame: Top and down tube gussets for extra strength
  • Top tube: 19.8"
  • Chainstay: 13.25"
  • Head tube angle: 75.5°
  • Seat tube angle: 71°
  • Standover: 8.75"
  • Bottom bracket height: 11.5"
  • Fork: Tapered pro style
  • Stem: Alloy top load
  • Bars: 8.75" rise, 28.5" wide, 12° back sweep, 1.5° up sweep
  • Grips: Tempered Goods Zephyr, flangeless
  • Brakes: Clear brake pads for superior braking power
  • Cranks: 3-piece
  • Bottom bracket: Fully sealed mid, 19mm axle
  • Chain: KMC 510H
  • Pedals: PC
  • Front hub: Fully sealed
  • Rear hub: Sealed bearing cassette
  • Rims: Alloy, 36 hole
  • Tyres: Innova, 2.30", front and rear
  • Seat: Custom pro style seat and post combo
  • Gearing: 25T to 9T
  • Note: Samples shown: the final product may vary.

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.

Forgotten Thrasher 20 Inch Bike

Brand: Forgotten SKU:

$598.99 AUD

Or 4 payments of $149.74 AUD with

Recommended Rider Height:

147-157cm

Colour - Smoke Grey

Top Tube Length - 19.8

20 inch BMX sizing

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 heightWheel sizeTop tube
60 to 91cm12"12 to 12.5"
81 to 106cm14"14 to 14.5"
96 to 122cm16"16 to 16.5"
122 to 147cm18"18 to 18.5"
147 to 157cm20"19.75 to 20.25"
157 to 168cm20"20 to 20.5"
168 to 175cm20"20.25 to 20.75"
175 to 183cm20"20.5 to 21"
183 to 190cm and up20"20.75 to 21.5"
160cm and up22"21 to 22.25"
160cm and up24"21.75 to 22"
160cm and up26"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

20 inch BMX sizing

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 heightWheel sizeTop tube
60 to 91cm12"12 to 12.5"
81 to 106cm14"14 to 14.5"
96 to 122cm16"16 to 16.5"
122 to 147cm18"18 to 18.5"
147 to 157cm20"19.75 to 20.25"
157 to 168cm20"20 to 20.5"
168 to 175cm20"20.25 to 20.75"
175 to 183cm20"20.5 to 21"
183 to 190cm and up20"20.75 to 21.5"
160cm and up22"21 to 22.25"
160cm and up24"21.75 to 22"
160cm and up26"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
$598.99 AUD

Price match request

Forgotten Thrasher 20 Inch Bike - Smoke Grey / 19.8

Metro bike shipping from $59.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

Availability

19.8
Smoke Grey
Gloss Neon Green
Gloss Neon Orange
Gloss Neon Pink

● In stock at LUXBMX ● With supplier ● Preorder ○ Sold out

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  • Australia's largest BMX range
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