The Evolution of Alloy BMX racing frames

Chase RSP 4.0 Limited Edition Colorway – Sand with Red/Grey Graphics

Chase BMX is the leader of introducing new technologIES to BMX and with the RSP 4.0, the level of BMX frames has been RAISED once again!

the level of BMX frames has been raised once again!

The CHASE RSP 4.0 starts off with the Olympic and World Championship geometry that Chase Pro Riders Connor Fields and Joris Daudet have been winning on for years. The triple butted tubing keeps the weight down and the strength at an Elite level. The Aero Seat Post/Clamp system and the internal brake cable give the RSP 4.0 a clean, factory look, to match the all new graphics and colors!

But here is where the RSP 4.0 gets really exciting – with the addition of new technical advancements on the Expert XL and larger size frames. These include a new enclosed dropouts with integrated 10mm (3/8″) chain tensioner system*, a integrated 1-1/8″-1.5″ tapered head tube, a press Fit BB86 Bottom Bracket, and the RSP 4.0 has been specifically designed to work with 120mm Disc brakes or traditional V brakes, with the optional ELEVN Disc Brake adaptor and 120mm Disc. For the RSP 4.0, we are excited to offer 2 new frames sizes – XXXL and Expert Cruiser. Also, the RSP 4.0 Frames are delivered to you with the 27.2 Aero Seat Post and Seat Post clamp and no additional cost!

The Mini, Junior, and Expert sized frames are 200 grams lighter than the RSP 3.0 and also include the 25.4 Aero Seat Post and Seat Clamp. These frames also feature a traditional Euro BB, Open Drop out design, and a standard 1-1/8″ intergrated headtube.

Put this all together and you get the best Alloy BMX frame ever created.

* For Chase RSP 4.0 frames sizes Expert XL and above, please not the Enclosed drop out on the frame will only work with hubs where the 3/8″ (10mm) axle bolts remove from the hub.

Chase RSP 4.0 frames are offered in 14 different sizes with 2 new sizes

11 options in 20″ frames :
Mini, Junior, Expert, Expert XL, Pro, Pro+, Pro XL, Pro XL+, Pro XXL, Pro XXL+, and Pro XXXL

3 options in 24″ frames:
Expert Cruiser and Pro or Pro+ Cruiser

INCLUDED ON EACH FRAME

Mini, Junior, Expert frames :
– Aero 25.4 Seat clamp and seat post
Expert XL and above frames:
– Aero 27.2 Seat clamp and seat post
– Chain tensioner system

INNOVATIVE Frame features

Integrated Tapered Head Tube
1-1/8” top to 1.5” bottom

Integrated Cable Routing
Brake cable is routed through top tube

Semi Integrated Brakes Studs
Lower position make for a cleaner look when using disc brakes

Optimized Aero System
Chase Aero system seat post and clamp NOW INCLUDED

Press Fit Integrated BB86 Bottom Bracket

Extra Length Reinforced Enclosed Dropout with built-in tensioner for 10mm (3/8″) axle

available in 8 colorways

Black with Neon Yellow/Grey graphics
Black with Red/Grey graphics
Black with Blue/Grey graphics
Black with White/Grey graphics
Polished with Neon Yellow/Grey graphics
Polished with Red/Grey graphics
Polished with Blue/Grey graphics
Sand with Red/Grey graphics

ALSO AVAILABLE separately

CHASE RSP 4.0 Frame was designed to use Disc brake and we approved it to be used with the ELEVN RSP 4.0 Disc Brake Adaptor Kit. (only for the expert XL and above sizes)
ELEVN RSP 4.0 Disc Kit includes :
• ELEVN 120mm Disc Brake Rotor, with 6 Torque bolt fastening system
• ELEVN Full CNC Alloy Adaptor for 120mm Disc Brake Mount only
• ELEVN Full CNC Chain Tensioner to work with adaptor (opposite side to the disc)
• Pin bolt security, 6 Disc screws and washers included
• 2 pair of brake pivot covers bolts to replace the standard brake mounts. (Black and Polished pair)
For 10mm (3/8″) rear axle set up only

How to install DISC BRAKE MOUNT video

ELEVN also offers a Aero Seat Post extension for both post sizes for the RSP 3.0, RSP 4.0, and ACT 1.0 frames
Mini – Expert : 25.4 / Expert XL and Above :  27.2
495mm in length with an extension of 325mm
Requires an additional aero seat post clamp for use

TECHNOLOGIES

Chase Bicycles utilizes the Aero seat post tube, seat post, and seat post clamp into BMX racing with our RSP 4.0 frames. 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.

Chase Bicycles utilizes the triple butting on our line of RSP 4.0 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 4.0 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 4.0 frame and against the completion.

Chase Bicycles utilizes the CNC machining process to produce out 3D Modulus Dropout and small parts of the entire line of RSP 4.0 frames. Using the CNC process allows us to design parts that are specifically built to work the best with our proprietary frame tubes, giving us another way to control the overall weight and strength – flex factor on the frames, to give you, the best ride and feel from our frames. Precision machining enhances the beauty and craftsmanship ship of all frames offered from Chase.

Chase Bicycles 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.

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.

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.

The Chase RSP 4.0 & ACT 1.0 Frames both 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.

The Chase RSP 4.0 & ACT 1.0 Frames both use a Integrated 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.

GEOMETRIES

Frame Size TT CS min LR AF SA HT HT Type SPL SP BBH BB Type Dropout Type Weight Rider Area
20″
Mini 18″
457.2 mm
12.75″
324 mm
1.5″
38.1 mm
73° 70° 4.5″
115 mm
Integrated
1-1/8″
8.3″
210.8 mm
aero
25.4 mm
10.6″
269.2 mm
Euro BSA
68×73 mm
Opened
3/8″ / 10 mm
1136 Grs
2 lbs 8.07 oz
18.32″
465.33 mm
Junior 19″
482.6 mm
13″
330.2 mm
1.5″
38.1 mm
73° 70° 4.5″
115 mm
Integrated
1-1/8″
8.8″
223.5 mm
aero
25.4 mm
10.6″
269.2 mm
Euro BSA
68×73 mm
Opened
3/8″ / 10 mm
1169 Grs
2 lb 9.24 oz
19.27″
489.49 mm
Expert 19.50″
495.3 mm
13″
330.2 mm
1.5″
38.1 mm
73° 70° 4.7″
120 mm
Integrated
1-1/8″
8.8″
223.5 mm
aero
25.4 mm
11″
279.4 mm
Euro BSA
68×73 mm
Opened
3/8″ / 10 mm
1179 Grs
2 lb 9.59 oz
19.69″
500.10 mm
Expert XL 20″
508 mm
13.5″
342.9 mm
1.5″
38.1 mm
73° 70° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
8.8″
223.5 mm
aero
27.2 mm
11″
279.4 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1530 Grs
3 lb 5.97 oz
20.31″
516.02 mm
Pro 20.50″
520.70 mm
14.25″
362.0 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1572 Grs
3 lb 7.45 oz
20.76″
527.51 mm
Pro + 20.75″
527.05 mm
14.25″
362.0 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1577 Grs
3 lb 7.63 oz
21.05″
534.77 mm
Pro XL 21″
533.4 mm
14.3″
363.3 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1590 Grs
3 lb 8.09 oz
21.28″
540.63 mm
Pro XL+ 21.25″
539.75 mm
14.5″
368.3 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1610 Grs
3 lb 8.79 oz
21.51″
546.50 mm
Pro XXL 21.50″
546.1 mm
14.5″
368.3 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1614 Grs
3 lb 8.93 oz
21.74″
552.37 mm
Pro XXL + 21.75″
552.45 mm
14.75″
374.65 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1618 Grs
3 lb 9.07 oz
21.97″
558.27 mm
Pro XXXL 22″
558.8 mm
14.75″
374.65 mm
1.5″
38.1 mm
74° 72.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
9.3″
236.2 mm
aero
27.2 mm
11.5″
292.1 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1634 Grs
3 lb 9.64 oz
22,19″
563.58 mm
24″
Expert Cruiser
20.50″
520.70 mm
14.5″
368.3 mm
1.5″
38.1 mm
73° 70° 4.5″
115 mm
Integrated
1-1/8″
10″
254 mm
aero
25.4 mm
12″
304.8 mm
Euro BSA
68×73 mm
Opened
3/8″ / 10 mm
1225 Grs
2 lb 11.2 oz
21,06″
535.46 mm
Pro Cruiser 21.25″
539.75 mm
15.25″
387.4 mm
1.5″
38.1 mm
73° 69.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
10.6″
269.2 mm
aero
27.2 mm
12″
304.8 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1634 Grs
3 lb 9.64 oz
22.00″
558.93 mm
Pro + Cruiser 21.75″
552.45 mm
15.25″
387.4 mm
1.5″
38.1 mm
73° 69.5° 4.7″
120 mm
Integrated Tapered
1-1/8″ -1.5″
10.6″
269.2 mm
aero
27.2 mm
12″
304.8 mm
Press Fit
86×92 mm
Enclosed Plated
3/8″ / 10 mm
1652 Grs
3 lb 10.27 oz
22.44″
569.95 mm

Frames Weights listed are without brake cable, seat post, seat clamp and chain tensioners

SIZING CHART

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Chase retailer.

1m00
|
1m05
|
1m10
|
1m15
|
1m20
|
1m25
|
1m30
|
1m35
|
1m40
|
1m45
|
1m50
|
1m55
|
1m60
|
1m65
|
1m70
|
1m75
|
1m80
|
1m85
|
1m90
|
1m95
|
Mini
.
Junior
.
Expert
.
Expert XL
.
Pro
.
Pro +
.
Pro XL
.
Pro XL +
.
Pro XXL
.
Pro XXL+
.
Pro XXXL
.
Expert Cruiser
.
Pro Cruiser
.
Pro + Cruiser
.

how to install Disc Brake Mount for CHASE RSP 4.0 and ACT 1.0