Redline Proline Expert XL (2023) / Black / 20TT

Black and white Redline Proline Expert XL racing bike isolated on a white background.

Close-up view of a white Redline Proline Expert XL Bike's rear dropout with a chain threading through the gears, focusing on the derailleur's mechanism and the wheel spokes.

Redline Proline Expert XL bike viewed from the side, showcasing handlebars, frame, and front wheel.

Close-up view of a black bicycle tire labeled "vee tire co speed booster" mounted on a wheel with reflective sidewall, attached to a Redline Proline Expert XL Bike frame.

Description

Redline is back with their venerable Proline range of complete race bikes. Seen on race tracks across Australia since the birth of BMX racing here, the Proline name is synonymous with riders looking to step up their race game and for this model year, Redline has added performance focused components like Avid disc brakes, along with the Alloy Formed and Butted Tubed frame.

Tried and tested CrMo is used in the forks and Redline knows its geometry for the expert frame with the Expert XL frame's top tube fitting right in at 20 inches.

Guess who was there at the beginning of BMX? Redline! They've been winning since the 70s with riders like the legendary Stompin Stu Thompson and later on, Aussie Sam "I Am" Willoughby. It's a company that sure knows its riders and how to beat the competition.

Features

Alloy formed and butted tubing. The Proline XL frame is built from proprietary formed and butted alloy tubes, with a 20" top tube for taller expert riders.
Full chromoly fork, tapered legs. Tried and tested chromoly out front, on geometry Redline has been refining since BMX racing started in Australia.
Fully sealed cassette rear hub. Redline aluminium hubs run fully sealed front and rear, geared 39x15 for a 51.32 rollout.
Two piece 165mm alloy cranks. Aluminium two piece cranks in a sealed Euro bottom bracket, turning a 39T alloy 104 BCD sprocket.
Race wheels, chain tensioners included. A-M6 alloy race 32H rims on stainless 14g black spokes with Vee Speed Booster tyres, and tensioners in the box.

Specifications

Size: 20" wheels, 20" top tube
Frame: Proprietary alloy, formed and butted tubing
Top tube: 20"
Chainstay: 13.25"
Head tube angle: 73.0°
Seat tube angle: 69.0°
Bottom bracket height: 11.2"
Fork: Full chromoly with tapered legs
Headset: Sealed integrated 1 1/8, aluminium top cap
Stem: RL aluminium hollow point
Bars: Chromoly, 6.5" rise / 12° back / 1° up
Grips: RL Pro Hex
Brakes: Tektro 930AL linear
Brake lever: Tektro 316A linear
Cranks: Aluminium 2 piece, 165mm
Bottom bracket: Sealed Euro
Sprocket: 39T, alloy, 104 BCD
Chain: KMC Z6
Pedals: Aluminium 9/16" platform
Front hub: Redline aluminium, fully sealed
Rear hub: Redline aluminium cassette, fully sealed
Rear cog: 15T
Spokes: Stainless 14g, black
Rims: A-M6 alloy Race, 20 x 1.5, 32H
Tyres: Vee Speed Booster, 20 x 1.95" front / 20 x 1.75" rear
Seat: Pivotal, no padding
Seat post: Aluminium Pivotal 26.8mm
Gearing: 39x15 / 51.32
Note: Chain tensioners included.

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.

Redline Proline Expert XL Bike

Name: Redline Proline Expert XL Bike
Brand: Redline
SKU: RLBK010-23-BLK
Price: 1099.99 AUD
Availability: InStock

Brand: Redline SKU: Click to copy the SKU and show the pick location

$1,099.99 AUD

Or 4 payments of $274.99 AUD with

Recommended Rider Height:

145-170cm

Colour - Black

Top Tube Length - 20

Race frames are sized by class, and the class you ride is set by rider height rather than age.

Size	Rider height	Top tube
Micro (18" wheels)	Under 120cm	16.25"
Mini (20" wheels)	110 to 140cm	17 to 18"
Junior	120 to 150cm	18.25 to 18.75"
Expert	130 to 170cm	19.5 to 19.75"
Expert XL	145 to 170cm	20 to 20.75"
Pro	150 to 175cm	20.25 to 20.75"
Pro XL	165 to 180cm	21 to 21.25"
Pro XXL	170 to 185cm and up	21.5 to 21.85"
Pro XXXL	175cm and up	22"
Pro XXXXL	180cm and up	22.5"
Cruiser (24" wheels)	175cm and up	21.5" and up

Heights overlap between classes on purpose. Where you land in two, a growing rider is usually better on the larger, and a rider who wants the bike to turn faster on the smaller. Some brands label the Pro size Pro L, with the same fit.

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 two sizes and still growing? Take the larger size.
Racing gates and wanting the bike to turn faster? Take the smaller size.
Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

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

Read the full buying guide