A black Staystrong V5.1 Pro XXL Disc BMX race frame with yellow accents and “Stay Strong” written on the frame is shown from the side on a white background, featuring race geometry.

Staystrong V5.1 Junior Disc Frame in orange and white, displaying “STAY STRONG” branding on the lower tube, features a BB86 TTL bottom bracket and race geometry, shown from the side against a white background.

White and orange Staystrong V5.1 Junior Disc Frame BMX race frame, featuring race geometry and "STAY STRONG" prominently displayed in bold letters, shown against a plain background.

A yellow Staystrong V5.1 Pro XXL Disc Frame BMX bike with black handlebars, wheels, and seat is displayed on a plain white background. Featuring a BMX race frame with advanced race geometry for optimal performance, the frame displays "STAY STRONG" printed in black letters, highlighting the Staystrong V5.1 Pro XXL Disc model.

Chart showing the Staystrong V5.1 Pro XXL Disc Frame size guide with race geometry measurements, recommended rider heights, seat post sizes, weights, and frame type details for various age and skill categories.

Highlights

Proven race geometry, unchanged
BB86 TTL bottom bracket
Race DVSN 5-point dropout system
Triple and double butted tubing

Description

The Stay Strong V5.1 BMX Race Frame represents the evolution of Stay Strong’s most successful race platform, refined, re-engineered, and pushed further than ever before. Building on the stiffness, proven race geometry, and unmistakable Stay Strong look of the previous generation, the V5.1 delivers even greater performance, strength, and usability.

At the core of the frame is the BB86 TTL (To The Line) bottom bracket, combined with an oversized seat tube, down tube, and bottom bracket junction to maximize stiffness and power transfer. The winning race geometry remains unchanged ensuring explosive starts, predictable handling, and high-speed stability.

The biggest upgrade comes in the form of the bespoke Race DVSN dropout and 5-point dropout system. This innovative design permanently fixes the inserts and disc hanger to the frame, improving stiffness while making wheel and brake adjustments faster and easier. The custom dropout also allows for a taller seat stay, resulting in a stiffer and wider rear end, while rear-access chain tensioners make wheel alignment quick and hassle-free.

Stay Strong dropouts are supplied with 10mm inserts as standard, with an optional 15mm thru-axle kit available for riders running a 15mm rear hub. The V5.1 is the most technically advanced and extensively tested race frame Stay Strong has ever produced, featuring triple and double butted tubing, a tapered head tube, smooth welds, and race-proven construction throughout.

Visually, the V5.1 stands out with exclusive dual-color schemes, upgraded water decals, and hidden details from the “STY STRG CODE” with every frame featuring a clean and fresh look, race-ready finish.

Note: Frames are supplied with a disc hanger suitable for 140mm disc rotors.

Features

Proven race geometry, unchanged. Explosive starts, predictable handling and high speed stability carried straight over from the previous generation, here in the Junior size.
BB86 TTL bottom bracket. An oversized seat tube, down tube and bottom bracket junction back it up, so your effort out of the gate goes into power transfer, not flex.
Race DVSN 5-point dropout system. Inserts and the disc hanger are fixed permanently to the frame for a stiffer, wider rear end, with rear-access chain tensioners for quick wheel alignment.
Triple and double butted tubing. A tapered head tube and smooth welds finish the most extensively tested race frame Stay Strong has produced.
Disc ready out of the box. Supplied with a disc hanger suitable for 140mm rotors, plus 10mm dropout inserts as standard and an optional 15mm thru-axle kit.

Specifications

Sizes: Junior
Bottom bracket: BB86 TTL (To The Line)
Butting: Triple and double butted tubing
Dropouts: Race DVSN 5-point, permanently fixed inserts and disc hanger, rear-access chain tensioners
Brake mounts: Disc, supplied with a hanger suitable for 140mm rotors
Head tube: Tapered
Axle: 10mm inserts as standard, optional 15mm thru-axle kit for a 15mm rear hub

Staystrong V5.1 Junior Disc Frame

Name: Staystrong V5.1 Junior Disc Frame
Brand: Stay Strong
SKU: KAB9822
Price: 1149.99 AUD
Availability: InStock

Brand: Stay Strong SKU: Click to copy the SKU and show the pick location

$1,149.99 AUD

Or 4 payments of $287.49 AUD with

Colour - Black/Yellow

Top Tube Length - 18.5

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 110cm	16.25"
Mini (20" wheels)	110 to 125cm	17 to 18"
Junior	120 to 140cm	18.25 to 18.75"
Expert	135 to 155cm	19.5 to 19.75"
Expert XL	150 to 165cm	20 to 20.75"
Pro	160 to 170cm	20.25 to 20.75"
Pro XL	165 to 175cm	21 to 21.25"
Pro XXL	170 to 185cm and up	21.5 to 21.85"
Pro XXXL	175 to 185cm and up	22"
Pro XXXXL	185cm and up	22.5"
Cruiser (24" wheels)	175cm and up	21.5" and up

Heights overlap between bike sizes on purpose. If you fall in two size categories, a growing rider new to racing is usually better suited to the larger bike, a experienced rider who wants the bike to more responsive should err on the smaller size. 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. Just don't guess their height either, you know how fast they can grow!

Here are some tips

Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Still not sure? We're the experts and size bikes for riders every day of the week. Our team has decades of experience between them and will help you decide which bike is the right fit based on rider height and racing experience.

Read the full buying guide

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 110cm	16.25"
Mini (20" wheels)	110 to 125cm	17 to 18"
Junior	120 to 140cm	18.25 to 18.75"
Expert	135 to 155cm	19.5 to 19.75"
Expert XL	150 to 165cm	20 to 20.75"
Pro	160 to 170cm	20.25 to 20.75"
Pro XL	165 to 175cm	21 to 21.25"
Pro XXL	170 to 185cm and up	21.5 to 21.85"
Pro XXXL	175 to 185cm and up	22"
Pro XXXXL	185cm and up	22.5"
Cruiser (24" wheels)	175cm and up	21.5" and up

How to measure

Here are some tips

Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Read the full buying guide

Staystrong V5.1 Junior Disc Frame - Black/Yellow / 18.5