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Side-by-Side Bike Comparison · September 2026

Keeway RKS 150 CBS Edition vs Roadmaster Rex

Technical comparison of performance curves, real-world dyno numbers, verified ratings, and full dynamic spec sheets.

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⚡ Power Leader

Keeway

Keeway RKS 150 CBS Edition

Engine 150 cc

Power 13.6 bhp

Mileage 40 kmpl

Brakes / ABS No

Price in BD ৳149,900

Details

💎 Best Value

Roadmaster

Roadmaster Rex

Engine 80 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS N/A

Price in BD ৳70,900

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

POWER & HARDWARE #1

Keeway RKS 150 CBS Edition (Keeway RKS 150 CBS Edition)

The Performance Benchmark

Delivers class-leading punch with 13.6 bhp and sharp throttle response. Backed by No for riders demanding confidence in high-speed and emergency scenarios.

Best for: Highway tours, enthusiast riding, emergency brake safety.

VALUE CHAMPION #2

Roadmaster Rex (Roadmaster Rex)

The Value Argument

Maximizes features per taka spent at ৳70,900. Ideal balance of equipment and accessible dealer pricing without sacrificing daily road manners.

Best for: Budget-conscious riders looking for modern styling.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 13.6 Bhp

Keeway RKS 150 CBS Edition (Keeway RKS 150 CBS Edition) 13.6 bhp @ 8000 rpm

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

Peak Torque Delivery (Nm) Top: 13 Nm

Keeway RKS 150 CBS Edition (Keeway RKS 150 CBS Edition) 13 Nm @ 6500 rpm

Roadmaster Rex (Roadmaster Rex) 0 Nm

Claimed Top Speeds

120 km/h

Keeway RKS 150 CBS Edition (Keeway RKS 150 CBS Edition)

80 km/h

Roadmaster Rex (Roadmaster Rex)

Dyno takeaway: Engine cooling hardware (liquid vs oil vs air) and gear ratios determine how long peak power can be sustained on open highway runs.

03 / Multi-Vector Scorecard

AI Analysis Engine

Rule-Based Specs Synthesizer

AI Engine Recommendation

Comparing power-to-weight, braking safety gear, real mileage data, and dealer price points across this matchup. Use the 5-point radar breakdown below to balance your budget against your daily riding style.

Keeway

Keeway RKS 150 CBS Edition (Keeway RKS 150 CBS Edition)

7.7 / 10

Performance 9.5

Comfort 6.5

Tech & Features 7.4

Fuel Economy 8.3

Value for Money 6.8

Roadmaster

Roadmaster Rex (Roadmaster Rex)

8.2 / 10

Performance 7.5

Comfort 8.5

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.8

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Keeway RKS 150 CBS Edition	Roadmaster Rex
Brand	Keeway	Roadmaster
CC	150	80
Regular Price	149900	70900
Bike Type	Standard	Commuter
Distributor/Seller	Aftab Automobile ltd	Roadmaster Motors LTD
Model Year	N/A	N/A
Brand Origin	China	N/A
Made In	China	N/A
Assemble In	Bangladesh	N/A
Launched Date	N/A	N/A

Engine 15

Engine Type	4 – Stroke Single Cylinder	4 – Stroke Single Cylinder
Displacement	178	79
Maximum Power	13.6 Bhp @ 8000 RPM	6 Bhp @ 8000 RPM
Maximum Torque	13 NM @ 6500 RPM	0 NM @ 0 RPM
Bore	57 mm	N/A
Stroke	58 mm	N/A
Compression Ratio	9.27:1	N/A
Valves	N/A	N/A
Fuel Supply	Carburetor	Carburetor
No of Cylinders	1	1
Engine Cooling	Air Cooled	Air Cooled
Starting Method	Kick & Electric	Kick & Electric
Engine Oil Grade	N/A	N/A
Engine Oil Capacity	N/A	N/A
Best Lube For	N/A	N/A

Transmission 4

Transmission Type	Manual	Manual
No of Gears	5	4
Clutch Type	Wet-multiplate	Wet multi-disc clutc
Drive Type	N/A	N/A

Mileage & Top Speed 2

Mileage	40 Kmpl (Approx)	60 Kmpl (Approx)
Top Speed	120 Kmph (Approx)	80 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	N/A
Front Suspension	Telescopic	Telescopic
Rear Suspension	Monoshock	Twin-Spring loaded

Brakes 6

Front Brake Type	Single Disc	Single Disc
Rear Brake Type	Disc Brake	Drum Brake
Front Brake Diameter	240 mm	N/A
Rear Brake Diameter	190 mm	N/A
Anti-Lock Braking System (ABS)	No	N/A
Braking System	CBS Braking	N/A

Wheels & Tyres 4

Front Tyre Size	90/90-17	2.50-17
Rear Tyre Size	120/80-17	2.75-17
Tyre Type	Tubeless	Tubetyre
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	2090 mm	1940 mm
Overall Width	790 mm	800 mm
Height	N/A	1300 mm
Ground Clearance	N/A	N/A
Weight	135 KG	88.8 Kg
Fuel Tank Capacity	N/A	9.5L
Wheelbase	N/A	1200 mm
Seat Height	N/A	N/A

Electricals 5

Battery Type	MF	MF
Battery Voltage	12V/7Ah	12v
Head Light	Halogen	Halogen
Tail Light	LED	Halogen
Indicators	LED	Halogen

Features 8

Speedometer	Digital	Analog
Odometer	Digital	Analog
RPM Meter	Analog	Digital
Handle Type	Pipe handle bar	Pipe handle bar
Seat Type	Split-Seat	Single-Seat
Passenger Grab Rail	Yes	Yes
Engine Kill Switch	Yes	No
Additional Feature	N/a	N/A