CHASE RSP 5.0 FRAME

Product Overview

The Chase RSP 5.0 is a race-focused aluminum frame built with hydroformed and butted 7005 T6 tubing for strength and weight reduction. It features internal cable routing, enclosed dropouts with integrated chain tensioners, and disc brake-only compatibility with clearance for post and flat mount systems. Available in 20" and 24" cruiser sizes with tapered or standard integrated headtubes depending on frame size, it's designed for competitive racing with size-specific bottom bracket standards.

Key Features

• 7005 T6 hydroformed and butted tubing – Double-butted top tube and triple-butted down tube reduce weight in non-critical areas while maintaining strength where needed; muscle-formed rear stays increase durability under power transfer
• Tapered headtube (Expert XL and larger) – 1-1/8" to 1.5" taper increases front-end stiffness and steering precision; smaller sizes use standard 1-1/8" integrated headtube
• Internal cable routing – Brake housing runs through the headtube, down tube, bottom bracket, and exits at the chainstay (Expert XL+) or bottom of down tube (Mini–Expert), protecting cables from damage and reducing drag
• Enclosed dropouts with integrated tensioners – CNC-machined 3/8" (10mm) closed dropouts accept standard BMX hubs (axle bolts thread into hub after insertion); built-in tensioners eliminate separate hardware
• Disc brake-only design – Rear triangle clearance accommodates both post and flat mount disc brake calipers; requires separate adapter (not included)
• Press Fit BB86 (Expert XL and larger) – Larger bearing surface improves stiffness and reduces creak; smaller sizes use Euro BSA 68mm threaded bottom bracket
• OS20 frame option available – Geometry optimized for oversized 20" wheels, forks, and tires; provides larger riders with improved comfort and rollover; requires OS20-specific fork
• Aero seatpost tube – Reduces drag and allows for lighter seatpost designs (seatpost and clamp sold separately)

Technical Specifications

• Material: 7005 T6 aluminum alloy
• Top Tube: Double-butted, hydroformed
• Down Tube: Triple-butted, hydroformed
• 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 (Mini, Junior, Expert) / Press Fit BB86 (Expert XL and larger)
• Dropouts: CNC-machined, enclosed 3/8" (10mm) with integrated chain tensioners
• Brake Compatibility: Disc brake only (post and flat mount; adapter required, sold separately)
• Cable Routing: Fully internal brake housing
• 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
• Sizes (24" Cruiser): Cruiser Pro, Cruiser Pro+

Included:

• Chain tensioners and mounting bolts
• Housing damper foam

Not Included (sold separately):

• Aero seatpost clamp
• Aero seatpost
• Disc brake adapter
• Brake housing

Compatibility and Ideal Use Cases

This frame is designed for competitive racing and requires disc brakes—rim brake setups are not compatible. Works with standard 3/8" (10mm) BMX hubs; axle bolts must be removed and threaded into the hub after inserting through the enclosed dropouts. Expert XL and larger sizes require tapered forks and Press Fit BB86 bottom brackets. Smaller sizes (Mini, Junior, Expert) use standard 1-1/8" forks and threaded bottom brackets. OS20 frames require OS20-specific forks for proper geometry and tire clearance. Riders must purchase a disc brake adapter (post or flat mount), seatpost, seatpost clamp, and brake housing separately. Ideal for racers seeking a stiff, lightweight aluminum frame with modern internal routing and disc brake performance.

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.