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Side-by-Side Bike Comparison · September 2026

Roadmaster Rex vs TVS Max Semi Trail 125

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

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💎 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

TVS

TVS Max Semi Trail 125

Engine 125 cc

Power 10.8 bhp

Mileage 50 kmpl

Brakes / ABS No

Price in BD ৳127,990

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

TVS Max Semi Trail 125 ( TVS Max Semi Trail 125)

The Performance Benchmark

Delivers class-leading punch with 10.8 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: 10.8 Bhp

Roadmaster Rex (Roadmaster Rex) 6 bhp @ 8000 rpm

TVS Max Semi Trail 125 ( TVS Max Semi Trail 125) 10.8 bhp @ 8000 rpm

Peak Torque Delivery (Nm) Top: 10.8 Nm

Roadmaster Rex (Roadmaster Rex) 0 Nm

TVS Max Semi Trail 125 ( TVS Max Semi Trail 125) 10.8 Nm @ 5500 rpm

Claimed Top Speeds

80 km/h

Roadmaster Rex (Roadmaster Rex)

100 km/h

TVS Max Semi Trail 125 ( TVS Max Semi Trail 125)

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)

8.3 / 10

Performance 7.9

Comfort 8.5

Tech & Features 6.8

Fuel Economy 9.5

Value for Money 8.8

TVS

TVS Max Semi Trail 125 ( TVS Max Semi Trail 125)

7.9 / 10

Performance 9.5

Comfort 6.9

Tech & Features 6.8

Fuel Economy 8.9

Value for Money 7.4

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Roadmaster Rex	TVS Max Semi Trail 125
Brand	Roadmaster	TVS
CC	80	125
Regular Price	70900	127990
Bike Type	Commuter	Dual Purpose bike
Distributor/Seller	Roadmaster Motors LTD	TVS Auto Bangladesh Limited
Model Year	N/A	2024
Brand Origin	N/A	India
Made In	N/A	India
Assemble In	N/A	Bangladesh
Launched Date	N/A	N.A

Engine 15

Engine Type	4 – Stroke Single Cylinder	Air cooled, 4 stroke, SI engine
Displacement	79	124.53
Maximum Power	6 Bhp @ 8000 RPM	10.8 Bhp @ 8000 RPM
Maximum Torque	0 NM @ 0 RPM	10.8 NM @ 5500 RPM
Bore	N/A	57.0 mm
Stroke	N/A	48.8 mm
Compression Ratio	N/A	9.4:1
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	10W30
Engine Oil Capacity	N/A	1 L (Without Filter)
Best Lube For	N/A	Mobil Super Moto 10W30

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)	50 Kmpl (Approx)
Top Speed	80 Kmph (Approx)	100 Kmph (Approx)

Chassis & Suspension 3

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

Brakes 6

Front Brake Type	Single Disc	Single Disc
Rear Brake Type	Drum Brake	Drum Brake
Front Brake Diameter	N/A	240 mm
Rear Brake Diameter	N/A	130 mm
Anti-Lock Braking System (ABS)	N/A	No
Braking System	N/A	Single Disc

Wheels & Tyres 4

Front Tyre Size	2.50-17	70/90-19
Rear Tyre Size	2.75-17	90/100-16
Tyre Type	Tubetyre	N/A
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	1940 mm	2000 mm
Overall Width	800 mm	700 mm
Height	1300 mm	1070 mm
Ground Clearance	N/A	N/A
Weight	88.8 Kg	120 Kg
Fuel Tank Capacity	9.5L	14.5 L
Wheelbase	1200 mm	1265 mm
Seat Height	N/A	800 mm

Electricals 5

Battery Type	MF	MF
Battery Voltage	12v	12v
Head Light	Halogen	Halogen
Tail Light	Halogen	LED
Indicators	Halogen	Halogen

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	Yes
Additional Feature	N/A	N/A