Chase RSP 5.0 Frame

Product Overview

The Chase RSP 5.0 is a competition-level BMX race frame developed through five generations of refinement with input from pro riders including Connor Fields and Joris Daudet. Constructed from 7005-T6 aluminum with hydro-formed and muscle-formed tubes, this frame features internal cable routing, enclosed dropouts, and disc brake-only compatibility. Available in both standard 20" wheel sizes (Mini through Pro XXXL) and OS20 configurations for larger riders, with tapered headtubes and press-fit bottom brackets on Expert XL and larger sizes.

Key Features

• 7005-T6 Premium Ultralight Aluminum – High-strength alloy tubing with double and triple butting reduces weight while maintaining stiffness and durability for racing
• Hydro-Formed and Muscle-Formed Tubing – Advanced forming techniques shape tubes for optimized strength-to-weight ratio and aerodynamic profiles
• Internal Cable Routing – Brake housing routes through headtube, down tube, bottom bracket, and exits at chainstay (Expert XL+) or bottom of down tube (Mini–Expert) for clean appearance and protected cables
• Enclosed CNC-Machined Dropouts – Closed 3/8" (10mm) dropouts with integrated chain tensioners provide precise wheel alignment and chain tension adjustment
• Disc Brake Only Design – Dropouts engineered for improved disc caliper clearance and compatibility with both post-mount and flat-mount disc brake systems (adapter required, sold separately)
• Tapered Headtube (Expert XL+) – 1-1/8" to 1.5" taper increases front-end stiffness with tapered steerer forks; integrated 1-1/8" straight headtube on Mini/Junior/Expert sizes
• Press-Fit BB86 (Expert XL+) – Press-fit bottom bracket on larger sizes reduces weight and increases stiffness; Euro BSA 68 threaded BB on Mini/Junior/Expert
• OS20 Size Options – Dedicated geometry for oversize 20" wheels, forks, and tires to provide larger riders improved comfort and OS20 system benefits

Technical Specifications

• Material: 7005-T6 aluminum alloy (premium ultralight)
• Top Tube: Double-butted hydro-formed
• Down Tube: Triple-butted hydro-formed
• Rear Stays: Muscle-formed
• Headtube: Integrated 1-1/8" (Mini, Junior, Expert) | Integrated tapered 1-1/8" to 1.5" (Expert XL and larger)
• Bottom Bracket: Euro BSA 68mm threaded (Mini, Junior, Expert) | Press-Fit BB86 (Expert XL and larger)
• Dropout Type: Enclosed CNC-machined with integrated chain tensioners
• Axle Size: 3/8" (10mm) standard BMX (requires bolt-in axle installation through closed dropouts)
• Brake Compatibility: Disc brake only (post-mount or flat-mount with adapter)
• Cable Routing: Full internal brake housing
• Seat Post: Aero seat post compatible (not included)
• Available Sizes (20"): Mini, Junior, Expert, Expert XL, Pro, Pro+, Pro XL, Pro XL+, Pro XXL, Pro XXL+, Pro XXXL, OS Pro XXL, OS Pro XXXL
• Available Sizes (24"): Cruiser Pro, Cruiser Pro+
• Color: Black / White

Compatibility and Ideal Use Cases

Compatibility Requirements:

• Requires disc brake system with appropriate adapter (post-mount or flat-mount, sold separately)
• Rear wheel must use 3/8" (10mm) bolt-in axle that can be removed from hub for installation through closed dropouts
• OS20 frame sizes require OS20-specific fork for correct geometry and tire clearance
• Aero seat post and seat post clamp sold separately
• Not compatible with rim brakes

Included: Chain tensioner and bolts, housing damper foam

Not Included (sold separately): Aero seat post clamp, aero seat post, disc brake adapter, brake housing

Designed for competitive BMX racing at all levels from beginner to elite. The range of sizes accommodates riders from young beginners (Mini) through adult professionals (Pro XXXL), with geometry refined through professional race feedback. OS20 models suit larger or heavier riders who benefit from the increased tire volume and wheel strength of the oversize 20" system. Disc brake-only design provides consistent stopping power in all conditions, while internal cable routing protects brake lines and maintains clean aesthetics for race presentation.

The RSP 5.0 Rear Dropouts use a standard 3/8 (10MM) bolt in axle. This is not a smaller sized thru axle, but the standard BMX Rear hub size 3/8 but the bolts need to remove from the hub, so you can insert them into the closed dropouts and then tread into the hubs. .
RSP 5.0 Frames are made exclusively for Disc Brakes and Require an adapter to do so. Both (Post and Flat mount) Elevn Disc Brake adapter was designed to work correctly with the frames, but other brands may work.
OS20 Frames require a OS20 fork for correct frame geometry and front tire clearance

SIZES:
20" : Mini, Junior, Expert, Expert XL, Pro, Pro+, Pro XL, Pro XL+, Pro XXL, Pro XXL+, Pro XXXL, OS Pro XXL, OS Pro XXXL
24" : Cruiser Pro, Cruiser Pro+

Included with RSP 5.0 Frame:

• Chain Tensioner & Bolts.
• Housing Damper Foam

Not included with Frame and Sold Separately:

• Aero Seat Post Clamp
• Aero Seat Post
• Disc Brake Adapter
• Brake Housing

Integrated Tapered Head Tube
For stiffer tapered steer tube fork

NEW Integrated Cable Routing
Routed from head tube to chain stays

NEW Restructured Enclosed Dropouts
To offer better clearance for a wide array of disc braking with internal built-in tensioners

Aero System shape
To improved aerodynamics and a slightly stiffer feel.

Press Fit Integrated BB86 Bottom Bracket
Simple and easy way to install

Born from some of the best alloys for building BMX race bikes, our special 7005-T6 SpeedLite alloy is the perfect blend for our Hydroforming process, giving the RSP frames the core strength needed to produce unmatched speed on the track, while keeping the overall weight of the frame down to a minimum.

Chase utilizes the triple butting on our line of RSP 5.0 frames. A triple-butted tube means it has three different wall thicknesses along its length. Chase uses this technology to reduce the amount of material used when building the RSP 5.0 frame, decreasing its weight by 15% compared to last years frame tubes used to construct the frame. Lighter where it can be and stiffer where it needs to be means no excess weight on the bike that gives you an advantage with the RSP 5.0 frame and against the completion.

Chase utilizes tapered tubing to offer you the most durable, yet light weight products, to help you achieve optimum results on the BMX race track. Our tapered items, use multiple thicknesses in the same tube, so the tube can be reinforced where needed with precision to help reduce stress areas where needed and lighten up the areas that don’t require extra materials. In aluminum the result are tube walls that eliminate stress points, boosting strength, reducing weight and improving fatigue life. The advantage is clear : Tapered tubes enhances strength and durability, at less weight.

Hydroformed tubes have two main advantages. First, the narrow axis is a flatter surface, which means more surface area to carry the load, so it is stiffer & stronger across the minor axis. Secondly, the deeper axis is stiffer since the stiffness varies to the cube of the diameter, stronger to the square. When using an oval shaped tube on a typical BMX frame it helps reduce flex but only in one direction, but on the Chase frames, the tubes are oval in both directions in the main flex areas and these tubes help reduce flex in both main directions.

Chase RSP 5.0 Frames feature the Aero seat post tube, seat post, and seat post clamp into BMX racing. This is to not only to help gain fractions of a second on the track with improved aerodynamics, but the Aero tubes also offers a slightly stiffer feel. We know BMX bikes don’t need to go fully aero testing into a wind tunnel, but when races are won or lost by fractions of a second, every advantage will help.

All Chase Frames feature Muscle Forming for Chain and Seat Stays, a technique to give the back end of the ACT & RSP frames the stiffness and design shape we wanted and needed for optional design a special mold and process were needed to let us build the ultimate frame. Used with Carbon Fiber or Alloy to do just that, while letting us design the exact shape, design, and thickness to offer the optional designed back end on the Chase frames.

For the Chase RSP 5.0 frames, we have restructured the dropouts to offer better clearance for a wide array of disc brake calibers, improving the overall braking performance. Like the RSP 4.0, we have designed them to be able to take the extra force created by using a disc brake and disc brake mount, now compatible for both post mount & flat mount disc brake system.

While each rider is unique, Chase has developed Bio Fit sizing for our frames to offer riders the ultimate size options for BMX racing. The sizing used for the Chase line has been carefully designed to give riders the optimum power output in the size range offered. Our commitment to details and offering many size options, gives you a custom fit BMX frame, that you can buy right at your local Chase BMX Dealer..

Chase RSP 5.0 Frames use a Integrated Tapered Headtube. Tapered head tubes offer a combination for the bearing sizes. Our tapered head tubes have a 1-1/8” upper diameter to 1.5” lower diameter. this allows you to run a tapered steer tube fork, or use a full 1-1/8” fork steer tube, with the offered 1.5” lower bearing, when the headset has an optional 1-1/8” to 1.5” fork race option.

Chase RSP 5.0 Frames use a Press Fit style Bottom Bracket tube. Press Fit BB are a simple and easy way to install a Bottom Bracket, where the Bottom Bracket you supply for your frame has the Bearings in cups and simply press into the frame, eliminating the chance of damaging BB threads, with the traditional Euro BB. The BB is usually lighter and easier to install and remove as well.

Chase RSP 5.0 Frames feature an Fully enclosed, Extra long (2.3″ or 60mm) axle area slot, 10mm drop outs. The Enclosed system also houses an Internal system with built-in alloy tensioner, allowing you to use the full length of the dropout.

Chase RSP 5.0 Frames feature new Internal Cable Routing from the Head Tube, through the Down Tube & Bottom Bracket, and exits out of the Chain Stay (exits out of the bottom of the down tube for small sizes), giving you the factory look, as well as providing protection for the brake cable and graphics, since the cable does not rub against the frame.

GEOMETRIES :

NOTE: RSP 5.0 frame weights listed are weighed exactly how the frames arrives to you, with paint, decals, & clear coating.