BMX FRAME INSPYRE ALU CONCORDE V4 – BMX RACING

The arrival of the ERA CF didn't put the Concorde on hold. Quite the opposite. While a new chapter opened with carbon fiber, Inspyre continued to develop its aluminum frame with the same exacting standards, in order to meet the expectations of riders. BMX Racing and to the requirements of BMX Race competition.

For over a year, Inspyre worked with its factory riders to develop, test, and refine the Concorde V4. Mathis Ragot Richard notably tested the first V4 prototypes during the Australian winter, while Zian Lemee and Théo Thouin accumulated many hours on the new frame throughout its development. Clément Rocherieux went even further, winning his first Elite race on the prototype.

The Concorde V4 marks the culmination of several years of development. An evolution meticulously designed down to the smallest detail to offer a rigid, precise, stable, and perfectly adapted competition aluminum frame for the demands of... Modern BMX Race. The Concorde V4 is designed to offer maximum performance during grid starts, accelerations, restarts, technical sections, banked turns, jumps and landings, while maintaining precision and control on the BMX track.

A redesigned rear structure

The Concorde V4 benefits from a fully optimized rear triangle, combining a 3D forged and CNC machined construction, a male/female interface at the dropouts and a platform that is 12.5% wider. This architecture improves rigidity, stability, strength and control, while offering more clearance around the drivetrain.

The CNC-machined reinforcement provides lateral support and torsional rigidity while optimizing material usage. For Pro and Cruiser sizes, the new BB386 Ø46 mm / 86.5 mm platform reinforces the junction between the downtube, chainstays, and bottom bracket. This improves power transfer and acceleration precision, while also offering greater flexibility in crankset and bottom bracket configurations.

This design allows the rider to better utilize their power on the track, particularly during BMX Racing starts, restarts after turns and acceleration phases where every watt and every movement can make a difference.

Internal hose passage

The new fully internal brake hose routing offers a clean and discreet integration, with a path through the top tube and a direct exit at the seat stays, bypassing the bottom bracket area. This design choice simplifies hose installation, maintenance, and replacement. Pre-installed anti-vibration foam ensures the hose stays securely in place within the frame while effectively reducing unwanted noise.

This integration also helps to maintain a clean and uncluttered BMX Racing cockpit, while limiting elements that could hinder the rider during movements on the bike and on the track.

Apex Carbon Fork

Its design and geometry have been optimized to maximize structural rigidity and power transmission from the frame kit, while minimizing drag. Its internal construction combines different types of carbon fibers to effectively manage lateral stresses, torsion, and impacts. The 7075-T6 aluminum steerer ensures excellent strength and durability, while the CNC-machined aluminum dropouts guarantee high precision. They are designed to accommodate a 20mm thru-axle (not included).

Combined with the Concorde V4, the Apex Carbon fork forms a package dedicated to BMX Race and BMX Racing performance, with a clear objective: to optimize rigidity, steering precision, power transmission and control in all phases of a race, from the grid start to the final sprint.

FEATURES

• AL66 aluminum frame
• Apex Carbon Fork
• Hydroformed tubes with multiple thicknesses
• Internal brake hose routing with anti-vibration foam
• Bottom bracket BSA 68mm or BB386 depending on the sizes - see the table below
• Rear brake interface Post Mount and 120mm disc
• Supplied with 15mm disc bracket and 15mm/10mm adapters
• 15mm axle not included - sold separately (reference: CAIN5028)
• Integrated chain tensioning system with Allen key adjustment

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GEOMETRIES

FRAME SIZE	RIDER AREA	DOWNTUBE	TOP TUBE		AR BASES		CORNER DIRECTION	CORNER SADDLE TUBE	BB HEIGHT	HEIGHT DIRECTION SOCKET	HEIGHT FORK	DEPORT FORK	WHEELBASE
	HAS	B	C		D		E	F	G	H	I	J	K
	mm	mm	Inches	mm	Inches (min / max)	mm (min / max)	°	°	mm	°	mm	mm	mm (min / max)
Junior	526	480	18.45	469	13.3 / 14.3	337 / 362	73rd	70°	3.7	110	309	30	845 / 870
Expert	544	505	19.50	495	13.3 / 14.3	337 / 362	73rd	71°	16.4	110	309	30	883 / 908
Expert XL	559	520	20.20	513	13.3 / 14.3	337 / 362	73rd	71°	16.4	110	309	30	901 / 926
Pro	563	528	20.65	525	14.2 / 15.2	360 / 385	74°	72°	45.4	115	309	30	940 / 965
Pro XL	575	542	21.25	540	14.4 / 15.4	365 / 390	74°	72°	45.4	115	309	30	961 / 986
Pro 2XL	585	553	21.75	552	14.7 / 15.7	373 / 398	74°	72°	45.4	115	309	30	981 / 1006
Pro 3XL	596	566	22.25	565	15.3 / 16.3	389 / 414	74°	72°	45.4	115	309	30	1012 / 1037
Pro 4XL	611	584	23.00	584	15.3 / 16.3	390 / 415	74°	72°	45.4	115	309	30	1033 / 1058
PRO XL Cruiser	617	572	21.85	555	15/16	380 / 405	73.5°	70°	5	115	359	30	971 / 996
PRO XXL Cruiser	639	593	22.85	580	15.3 / 16.3	390 / 415	73.5°	70°	5	115	359	30	971 / 996

The head tube angles and bottom bracket height are influenced by the choice of fork and tires. We meticulously calibrated our angles to ensure accuracy when paired with a Pride carbon fork and when using tires TIOGA Fastr or PowerBlock. This configuration guarantees precise angles and measurements. However, the use of alternative forks and tires may introduce a deviation, either positive or negative, in both heights and angles.

TECHNICAL SPECIFICATIONS

FRAME SIZE	SADDLE TUBE DIAMETER	SADDLE COLLAR DIAMETER	BOTTOM BRACKET TYPE	HEADSET BUSHING - SHIS	TABLETOP SIZE (MAX)	TIRE SIZE (MAX)	TYPE OF BRAKES	FORK AXLE	REAR AXLE	POIDS FRAME (-/+ 5%)
Junior	22.2mm	25.4mm	Euro BSA - 1.375’’ BC 24T - 68MM	Integrated 1-1/8" 110mm IS42 | IS42 - 45°	44T	20 x 1-3/8" 451-35	Disc only Post Mount 120mm	10mm	15mm (supplied with 10mm reducers / 15mm shaft sold separately)	-
Expert										-
Expert XL										-
Pro	31.6mm	34.9mm	PRESS FIT BB386	Integrated Tapered 115mm IS42 | IS52 - 45°	50T	20 x 1.85" 406-50		20mm		1500g
Pro XL					52T					1520g
Pro 2XL										1575g
Pro 3XL										1595g
Pro 4XL										1625g
PRO XL Cruiser					44T	24 x 1.75" 507-44				-
PRO XXL Cruiser