All images are for reference only. Actual product color & size may vary.
BRG Store
Best for
Pro XL riders
Race class
Mini / Junior / Expert XL / Expert / Pro XXL / Pro XL / Pro / Cruiser
Fit checked before shipping · Mechanic support via WhatsApp · Authorized dealer sourcing
100% Secure Transaction
Live Stock
Inventory updated daily. Items in stock ship the next business day.
Fast Delivery
We use trusted couriers to make sure your order arrives safely and on time.
Secure Payments
100% secure transaction. We never share your information with third parties.
Satisfaction Guarantee
Every item is checked before shipment. Return within 10 business days if unsatisfied.
Preorder terms
Clear timing before you commit.
09 Sep 2026 target
Full payment or WhatsApp-assisted
Cancelable before supplier confirmation
~14 business days after order
Fit & geometry
Race class
Mini / Junior / Expert XL / Expert / Pro XXL / Pro XL / Pro / Cruiser
Rider height
Top tube
Check geometry/spec table before ordering
Wheel size
20×1
Material
Alloy
Skill level
intermediate to national-level racers
Setup context
Crank length
Gear ratio
Confirm chainring and cog setup
Brake type
Confirm brake standard
Pedal setup
Confirm included pedal/clipless preference
Track recommendation
Best for gate starts, technical straights, and national race pace.
Next step
Recommended upgrades
Gearing
Confirm chainring/cog ratio for your local track before checkout.
Contact points
Review pedals, grips, and saddle setup for gate-start confidence.
Protection
Pair the build with race helmet, gloves, and body protection.
Product info
Chase OS20 Frames must use a OS20 Fork and OS20 wheels/Tires for the bike to ride as designed for proper geometry. OS20 Frames will not work with non OS20 Forks or Wheels. Chase BMX started with the RSP 1.0 frame that Connor Fields rode from Day 1. Each time we updated the frame, we took the feedback from Connor, then Joris, and other Pro riders we sponsored. The RSP 5.0 is the culmination of the refinements and upgrades to make it our best Alloy frame ever. The Chase RSP 5.0 Frames feature Tapered Headtube (Expert XL and Larger sizes), an Aero Seat Post tube, Enclosed Rear dropouts, Press Fit Bottom Brackets (Expert XL and Above), Triple and Double Butted tubes, Hydro and Muscle formed 7005 T6 Premium Ultralight tubing. RSP 5.0 Frames now feature a new, internal cable routing from the Head Tube, through the Down Tube & Bottom Bracket, and exits out of the Chain Stay (Expert XL and Larger), and for the Mini – Expert, the cable exits out of the bottom of the down tube. All Chase RSP 5.0 frames are Disc Brake only designed frames. The dropouts were restructured to offer better clearance for a wide array of disc brake calibers, improving the overall braking performance, and now compatible for both post and flat mount disc brake system. (Disc Adapter kit sold separately) The Chase RSP 5.0 Frame is now offered in a OS20 frame size option with refined geometry for riders wanting to use OS20 wheels, forks, and tires. OS20 uses the oversizes rims, tires, and forks to give larger riders a more comfortable ride as well as experience all the benefits of OS20. SPECS : Alumium 7075 T6 frame (Premium Ultralight). Double butted hydroformed top tube. hydroformed triple butted Down tube. Muscle forming rear stays New CNC machined dropouts Internal Brake Housing routing - All new for all frame sizes - Click here for more info Integrated Headtube 1-1/8" (Mini, Junior and Expert Only) Integrated Tapered Headtube 1-1/8" - 1.5" (Expert XL and Above sizes) Euro BSA 68 (Mini, Junior and Expert Only) Press Fit BB 86 (Expert XL and Above sizes)) 3/8" (10mm) closed dropouts with integrated tensioners 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 & wheels for correct frame geometry and front tire clearance - Click here for view OS20 forks 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 DOWNLOAD RSP 5.0 FRAME BRAKE SETUP NOTICE Please note : Brake fluid on paint that is not silicone-based can act like a paint thinner and eat away at the coating of your paint, causing it to peel. Due to different types of paints/decals/materials used for BMX parts, do not let the Brake Fluid touch any part of the bike, as there can be significant self infliced damage due to this. 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 : Frame Size TT CS min LR FH Tires AF SA BBH BB type HT HT type SPL Seat Post Dropout type Max Tires Clearance Brake type Weight 20" Mini 18" 457.2mm 12.76" 324mm 1.5" 38.1mm 12.1" 307mm Front: 20×1-1/8" Rear: 20×1-1/8" 73° 70° 10.6" 269.4mm Euro BSA 68mm 4.5" 115mm Integrated IS 42/42 8.5" 215.9mm Aero 25.4mm Enclosed 3/8" – 10mm 20×1-1/8" Post or Flat mount 120/140mm 1.24 Kg Junior 19" 482.6mm 13" 330.2 mm 1.5" 38.1mm 12.1" 307mm Front: 20×1-1/8" Rear: 20×1-1/8" 73° 70° 10.6" 269.4mm Euro BSA 68mm 4.5" 115mm Integrated IS 42/42 8.8" 223.52mm Aero 25.4mm Enclosed 3/8" – 10mm 20×1-1/8" Post or Flat mount 120/140mm 1.29 Kg Expert 19.5" 495.3mm 13.25" 336.55mm 1.5" 38.1mm 12.1" 307m Front: 20×1-3/8" Rear: 20×1-3/8" 73.4° 70.4° 11" 279.4mm Euro BSA 68mm 4.7" 120mm Integrated IS 42/42 8.8" 223.52mm Aero 25.4mm Enclosed 3/8" – 10mm 20×1-3/8" Post or Flat mount 120/140mm 1.31 Kg Expert XL 20" 508mm 13.5" 342.9mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.60" Rear: 20×1.40" Rear: 20×1.60" – 73° 75.5° – 70° 72.5° – 11" / 279.4mm 11.95" / 303.77mm Press Fit BB86 4.5" 115mm Integrated IS 42/52 8.8" 223.52mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.62 Kg Pro 20.5" 520.7mm 14.25" 361.95mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.67 Kg Pro + 20.75" 527.05mm 14.3" 361.95mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.67 Kg Pro XL 21" 533.4mm 14.25" 361.95mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.68 Kg Pro XL + 21.25" 539.75mm 14.5" 368.3mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.70 Kg Pro XXL 21.5" 546.1mm 14.5" 368.3 mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.71 Kg Pro XXL + 21.75" 552.45mm 14.8" 374.65mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.72 Kg Pro XXXL 22" 558.8mm 15" 381mm 1.5" 38.1mm 12.1" 307mm Front: 20×1.75" Rear: 20×1.60" Rear: 20×1.75" – 74° 74.6° – 72.5° 73.1° – 11.5" / 292.1mm 11.74" / 298.3mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 9.3" 236.2mm Aero 27.2mm Enclosed 3/8" – 10mm 20×2.10" Post or Flat mount 120/140mm 1.72 Kg Frame Size TT CS min LR FH Tires AF SA BBH BB type HT HT type SPL Seat Post Dropout type Max Tires Clearance Brake type Weight OS 20" OS Pro XXL 21.5" 546.1mm 14.5" 368.3mm 1.5" 38.1mm 13.2" 334.5mm Front: OS20x1.85" Rear: OS20x1.60" Rear: OS20x1.85" – 74° 74.4° – 72.5° 72.9° – 11.5" / 292.1mm 11.67" / 296.4mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 10" 252.73mm Aero 27.2mm Enclosed 3/8" – 10mm OS20x1.85" Post or Flat mount 120/140mm 1.72 Kg OS Pro XXXL 22" 558.8mm 15" 381mm 1.5" 38.1mm 13.2" 334.5mm Front: OS20x1.85" Rear: OS20x1.60" Rear: OS20x1.85" – 74° 74.4° – 72.5° 72.9° – 11.5" / 292.1mm 11.67" / 296.4mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 10" 252.73mm Aero 27.2mm Enclosed 3/8" – 10mm OS20x1.85" Post or Flat mount 120/140mm 1.75 Kg Frame Size TT CS min LR FH Tires AF SA BBH BB type HT HT type SPL Seat Post Dropout type Max Tires Clearance Brake type Weight 24" Pro Cruiser 21.5" 546.1mm 14.7" 374.58mm 1.5" 38.1mm 14" 355mm Front: 24×1.75" Rear: 24×1.60" Rear: 24×1.75" – 74° 74.3° – 71° 71.3° – 11.8" / 299.72mm 11.92" / 302.76mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 10.6" 269.24mm Aero 27.2mm Enclosed 3/8" – 10mm 24×2.10" Post or Flat mount 120/140mm 1.74 Kg Pro + Cruiser 22" 558.8mm 14.7" 374.58mm 1.5" 38.1mm 14" 355mm Front: 24×1.75" Rear: 24×1.60" Rear: 24×1.75" – 74° 74.3° – 71° 71.3° – 11.8" / 299.72mm 11.92" / 302.76mm Press Fit BB86 4.7" 120mm Integrated IS 42/52 10.6" 269.24mm Aero 27.2mm Enclosed 3/8" – 10mm 24×2.10" Post or Flat mount 120/140mm 1.76 Kg NOTE : RSP 5.0 frame weights listed are weighed exactly how the frames arrives to you, with paint, decals, & clear coating. Chase RSP 5.0 Hydraulic Brake Housing Routing Visual Guide - Standard Housing A visual guide on how to insert and route the Hydraulic Brake Housing into the RSP 5.0 frame. While there are specialty tools to do this, we wanted to show it can be done as easy as just with an old Brake cable and housing, as well as some lube! Chase RSP 5.0 Hydraulic Brake Housing Routing Visual Guide - Housing with Banjo A visual guide on how to insert and route the Hydraulic Brake Housing with a Banjo into the RSP 5.0 frame. While there are specialty tools to do this, we wanted to show it can be done as easy as just with an old Brake cable and housing, as well as some lube!
Specifications
Frame Reference

| Frame Size | TT | CS min | LR | AF | SA | HT | SPL | BBH | WB | Wheels |
|---|---|---|---|---|---|---|---|---|---|---|
| Mini | 18"457.2 mm | 12.76"324 mm | 1.5"38.1 mm | 73° | 70° | 4.5"115 mm | 8.5"215.9 mm | 10.6"269.4 mm | — | 20" |
| Junior | 19"482.6 mm | 13"330.2 mm | 1.5"38.1 mm | 73° | 70° | 4.5"115 mm | 8.8"223.5 mm | 10.6"269.4 mm | — | 20" |
| Expert | 19.5"495.3 mm | 13.25"336.6 mm | 1.5"38.1 mm | 73.4° | 70.4° | 4.7"120 mm | 8.8"223.5 mm | 11"279.4 mm | — | 20" |
| Expert XL | 20"508 mm | 13.5"342.9 mm | 1.5"38.1 mm | 73° / 75.5° | 70° / 72.5° | 4.5"115 mm | 8.8"223.5 mm | 11"279.4 mm | — | 20" |
| Pro | 20.5"520.7 mm | 14.25"362 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro+ | 20.75"527.1 mm | 14.3"363.2 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro XL | 21"533.4 mm | 14.25"362 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro XL+ | 21.25"539.8 mm | 14.5"368.3 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro XXL | 21.5"546.1 mm | 14.5"368.3 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro XXL+ | 21.75"552.5 mm | 14.8"375.9 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
| Pro XXXL | 22"558.8 mm | 15"381 mm | 1.5"38.1 mm | 74° / 74.6° | 72.5° / 73.1° | 4.7"120 mm | 9.3"236.2 mm | 11.5"292.1 mm | — | 20" |
✓ Official geometry — chasebicycles.com · WB varies by fork

THIS ITEM
CHASE RSP 5.0 OS20 FRAME DUST
COMBINED TOTAL
Rp 22.644.625
Preorder each separately via WhatsApp for bundle deals

MEYBO

MEYBO

MEYBO

MEYBO
CHASE RSP 5.0 OS20 FRAME DUST
Rp 5.707.943