Overview Verdict The Dyno Room LIVE AI Engine Full Specs Media & Gallery

Compare Bikes Compare Accessories

Side-by-Side Bike Comparison · September 2026

Roadmaster Rex vs Runner Bullet 100 V2

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

Add Bike to Comparison

💎 Best Value

Roadmaster

Roadmaster Rex

Engine 80 cc

Power 6 bhp

Mileage 60 kmpl

Brakes / ABS N/A

Price in BD ৳70,900

Details

⚡ Power Leader

RUNNER

Runner Bullet 100 V2

Engine 100 cc

Power 6.3 bhp

Mileage 45 kmpl

Brakes / ABS No

Switch Variant

Price in BD ৳109,000

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

VALUE CHAMPION #1

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.

POWER & HARDWARE #2

Runner Bullet 100 V2 (Runner Bullet 100 V2)

The Performance Benchmark

Delivers class-leading punch with 6.3 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.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 6.3 Bhp

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

Runner Bullet 100 V2 (Runner Bullet 100 V2) 6.3 bhp @ 7500 rpm

Peak Torque Delivery (Nm) Top: 7 Nm

Roadmaster Rex (Roadmaster Rex) 0 Nm

Runner Bullet 100 V2 (Runner Bullet 100 V2) 7 Nm @ 5500 rpm

Claimed Top Speeds

80 km/h

Roadmaster Rex (Roadmaster Rex)

80 km/h

Runner Bullet 100 V2 (Runner Bullet 100 V2)

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.

Roadmaster

Roadmaster Rex (Roadmaster Rex)

8.6 / 10

Performance 9.3

Comfort 8.5

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.8

RUNNER

Runner Bullet 100 V2 (Runner Bullet 100 V2)

8 / 10

Performance 9.5

Comfort 7.3

Tech & Features 6.8

Fuel Economy 8.6

Value for Money 7.8

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Roadmaster Rex	Runner Bullet 100 V2
Brand	Roadmaster	Runner
CC	80	100
Regular Price	70900	109000
Bike Type	Commuter	Commuter
Distributor/Seller	Roadmaster Motors LTD	Runner Automobiles Limited
Model Year	N/A	N/A
Brand Origin	N/A	Bangladesh
Made In	N/A	Bangladesh
Assemble In	N/A	Bangladesh
Launched Date	N/A	2025-10-10

Engine 15

Engine Type	4 – Stroke Single Cylinder	Single Cylinder 4 Stroke Air Cooled
Displacement	79	97.35
Maximum Power	6 Bhp @ 8000 RPM	6.3 Bhp @ 7500 RPM
Maximum Torque	0 NM @ 0 RPM	7 NM @ 5500 RPM
Bore	N/A	49.46 mm
Stroke	N/A	50.7 mm
Compression Ratio	N/A	8.8 : 1
Valves	N/A	2
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	20W40
Engine Oil Capacity	N/A	900 ml (Without Filter)
Best Lube For	N/A	Mobil Super Moto 20W40 4T

Transmission 4

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

Mileage & Top Speed 2

Mileage	60 Kmpl (Approx)	45 Kmpl (Approx)
Top Speed	80 Kmph (Approx)	80 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	Double Cradle
Front Suspension	Telescopic	Telescopic fork
Rear Suspension	Twin-Spring loaded	Dual Shock Absorber

Brakes 6

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

Wheels & Tyres 4

Front Tyre Size	2.50-17	2.75-18
Rear Tyre Size	2.75-17	3.25-18
Tyre Type	Tubetyre	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	1940 mm	2060 mm
Overall Width	800 mm	785 mm
Height	1300 mm	1268 mm
Ground Clearance	N/A	182 mm
Weight	88.8 Kg	120 Kg
Fuel Tank Capacity	9.5L	14 Liters
Wheelbase	1200 mm	1290 mm
Seat Height	N/A	790 mm

Electricals 5

Battery Type	MF	MF
Battery Voltage	12v	12V
Head Light	Halogen	12V 35/35W (Halogen)
Tail Light	Halogen	LED
Indicators	Halogen	LED

Features 8

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